Garmin Forerunner 35, with optical pulse sensor : Full analysis


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The new Garmin Forerunner 35 is the entry-level model in the Forerunner range, which this time comes bundled with the Garmin Elevate optical pulse sensor. Forerunner 25 that Garmin introduced last year, but the sensor isn't the only new thing it has.

The FR35 is still a simple to use watch, but it is now complemented by functions that were not previously present in Garmin's most basic range. Would you like to know what these new features are?

The watch for this test has been temporarily loaned by Garmin. Once completed I will send it back to you. It is important that you understand this, because the tests I perform and my opinions of the products are totally independent, as there is no remuneration of any kind from the brands.

Remember that if you want to show your gratitude for the tests I perform and want to help support the site, you can buy the watch through the links I provideThat way I get a small commission for each watch, which allows this website to continue and covers some of the work I do on it.

Now that that's all clear, let's get on with the test. Everything you'll find in the Garmin Forerunner 35, detailed with hairs and signs.


You can find the Garmin Forerunner 35 in different strap colours, but the size (and contents) of the case will always be the same. As the watch has an optical pulse sensor, there are no versions with or without a sensor as there might be with earlier versions.

Garmin Forerunner 35

When you open the box and throw away the leftovers, what you see is the only thing you're going to keep. Clock, instruction manual and sync and charge cable; which is the same one used by their Forerunner range brothers (230, 235, 630 and 735XT). I save having one more cable running around the desk.

Since the clock is most likely to be paired with your smartphone, you will end up using the cable exclusively to charge the clock.

Garmin Forerunner 35


The watch follows the same design pattern as previous models. It retains the four buttons (with only one scroll button) for easy operation. The display, in black and white, has a high level of contrast. Although it would not hurt a little more resolution, because with 128×128 pixels aesthetics is somewhat "old".

Garmin Forerunner 35

At the rear you will find the main new feature of this model, which is none other than the Garmin Elevate optical pulse sensor, in this case it is the renewed version that has already been seen in other Garmin models, such as the 735XT or the Fenix 3 Chronos.

Garmin Forerunner 35

And once it's unpacked, let's talk about the different sports modes.

Configuration of the different modes

The Garmin Forerunner 35 remains the most basic model in the Forerunner range, and its main feature is simplicity. Everything has been designed to be easy to use, and the absence of features is not because it is a low-end watch, but because we want to make it as simple as possible.

So don't expect complicated menus and lots of on-screen data - in fact, you can only set up two data screens. Here are the first changes from Forerunner 25, where last year's model allowed two data screens, now it allows three.

Garmin FR35 - Data Display

So, six in total. The size of the information is good. Maybe not as good as in the previous version because the numbers are bigger, but the readability is still very good.


The way to configure it varies slightly from the previous model, as we now have more modes of use than before. There is no configuration menu, but you must press the activity button (top right) and choose one of these modes. The screen for pulse and satellite signal search will appear (provided you have not chosen indoor racing), where if you press the scroll button you can access the different configuration menus.

Garmin Forerunner 35 - Satellite Search

There is also more data that can be added to these screens, increasing the possibilities of configuration of the model that precedes it:





Heart rate

Heart Rate Zone

Return time

Return distance

Rhythm of return

Average pace


Therefore, it is now possible to put the keystrokes on any data screen, instead of having one reserved exclusively for this purpose.

There are other settings you can make in each sports profile, such as alerts, which you can set for time, distance, calories or heart rate, and receive a warning when you exceed 30 minutes of running time or when you leave a certain heart rate zone.

Garmin Forerunner 35 - Alerts

Along with these alerts are the classic laps manually - when pressing the button - or automatically - every kilometer, it is not possible to define another distance -, and the possibility of stopping the activity automatically when stopping.

Garmin Forerunner 35 - Autolap

There is another option that allows you to choose between pace or speed. It allows you to see your speed in km/h (e.g. 12 km/h) or in minutes per kilometer (e.g. 5 min/km).

Garmin Forerunner 35 - Pace/Speed

But perhaps the most important option it offers is the ability to choose different modes of use, with even a basic interval mode not present on Forerunner 25:

  • Free: Running without any objective, recording the activity in a normal way.
  • Running/walking: Allows to program a running time and a walking time, warning in each one of the intervals. Specially indicated for the beginners who are starting to run.
  • Virtual Pacer: You enter a target pace against which to compete, and you can see on screen whether you are above or below that pace.
  • Intervals: A new mode in Forerunner's basic range, similar to what big brothers offer (in terms of clock settings, not workouts that can be set up from Garmin Connect).
    You can set the work and rest time, the number of repetitions you will do and the warm-up and cool-down times. The targets are open; that is, you cannot define that the interval has to be done at a certain pace or in a specific heart rate zone.

For cycling or cardio, you can only select the interval mode.

As you can see, the configuration is extremely simple. In a matter of two minutes you will have the clock ready to run. To do this, you simply have to wait on the screen before the configuration for the clock to obtain a GPS and pulse signal. You must wait for the bars to complete and the pulse icon to stop blinking before pressing the start button.

Garmin Forerunner 35 - GPS readyAnd at this point, we can start running.

Running with the Forerunner 35

Because Forerunner 35 supports satellite caching, the initial signal search is very fast. With each watch synchronization (either via cable or Bluetooth) the satellite location database will be updated, finding a signal within seconds. This cache is valid for seven days.

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When you start the activity you will have access to the different data screens that you have configured, simply by pressing the scroll button. If you have selected to show instantaneous pace, you should know that you will see it in multiples of five seconds, although if you select the average pace or the lap pace you will have the data to the second.

The watch is also capable of displaying (and recording) cadence data. Although it does not have a metronome for the exercises, it is quite useful when training a certain running cadence. In addition, in competition, it will also serve to see if your technique is getting worse due to accumulated fatigue. And once the activity is synchronized you will be able to see the cadence graph.

Garmin - Cadence chart

The GPS data recording is of variable interval, storing a GPS point in a period of time that the watch estimates as correct. This is called "smart recording".

A few years ago it made more sense because of the limited memory that the devices had, but that limit is not found today. Despite that, it is still used in the most basic watches, partly to differentiate performance from the higher models, but also to display a more stable instantaneous rhythm on the screen.

Is it better recording per second? At the level of accuracy in the tracks (the map of the route that you can consult after synchronizing the activity) undoubtedly, since recording points every second instead of every 3-5 seconds is more accurate.

For a user who is just starting out I think the variable mode is more reasonable as he will have a greater continuity of pace, especially in places with more complicated coverage. And the pace graphs will be more stable, helping to understand the data more easily. Look for example at the difference in pace recorded on the FR35 and a Fenix 3 in the same activity.

Garmin Forerunner 35 - Rhythm Comparison

The downside is that those who do short series and want to do them at a certain pace by looking at the clock screen will have a slower pace variation.

In any case, for normal use either of the two recording formats is perfectly valid, always taking into account the points indicated above.

Therefore you should note that FR35 does not support per second recording, and only records data in the smart mode. And this is only for GPS location data; both cadence and pulse data will be recorded every second during the activity.

Other sports modes

Another major new feature is that Forerunner 35 now has more sport modes, such as cycling.


Previously, the watches in the basic range only contemplated running outdoors or indoors. You could use it for any other activity, but if you used it with your bike, for example, you had to change the type of activity after synchronizing your training.

In addition to the outdoor running profile, you also have a profile for indoor running, cycling and cardio.

Each one can have its own configuration of screens, alerts and the other options we have seen before.

You no longer have to switch between pace and speed depending on whether you're running or cycling, and another big advantage is that you won't break your racing record every time you take a bike out.

Personal records

In both Forerunner 35 and the Garmin Connect web application, you can keep track of your personal records - the best records for specific distances, or the longest distances - and this is nothing new, as you've already found it in FR25.

What is new is that, as we now have several usage profiles, the watch will also store personal cycling records (in addition to the running records).

Garmin Forerunner 35 - Records

Here you can have your best times recorded for different distances (1 km, 1 mile, 5 km, 10 km, half marathon and marathon) as well as longer distance traveled.

Garmin Forerunner 35 - Records

But since we also have a cycling mode, we also have the fastest 40 kilometres or the longest distance cycled.

Garmin Forerunner 35 - Cycling record

And of course, those records can also be viewed directly in Garmin Connect on their corresponding tab. And if you come from another Garmin device, you can synchronize the previous records with your new clock and keep them up to date.

Activity monitor

The activity monitor has the same features that you can find in the rest of the range today, so you can count steps, estimate calories and distance or track the quality of your sleep, and thanks to the optical pulse sensor you also have pulse data throughout the day.

What has changed is that the FR35 adopts the "widget" system of the big brothers. They are not widgets as such (as this model does not have Connect IQ support), but they are presented in the same way.

All these screens can be accessed by pressing the scroll button from the main screen. Below is a gallery of all these screens, because a picture is worth a thousand words.

When you scroll, the first thing that appears is the heart rate screen. When you open it, you will know your pulse at that precise moment (it takes a few seconds to register it, you must wait until the icon stops blinking), along with the average of your resting pulse. This resting pulse, instead of being the lowest register during the day, is the average of your pulse at the times when you are not moving.

Garmin Forerunner 35 - Widget FC

If you press the radio button you will access a graph of the last 4 hours, along with the lowest and highest record for that time period.

Garmin Forerunner 35 - 4-hour chart

This data will be recorded throughout the day, and since your clock is connected to the mobile application, it will be synchronized throughout the day and can be found both in the app and on the web.

Garmin FR35 - FC in app

The logging rate is variable to help save battery power. When there is movement, the clock will log data every few minutes. If there is no movement (e.g. at night), it can take more than an hour between logs. But on a day-to-day basis the logging is much more constant.

Garmin FR35 - FC on Connect

But perhaps the most important part is the ability to keep track of your daily averages. By monitoring this data you can tell if you are overtraining or about to get sick, in which case the trend will increase.

Garmin FR35 - Resting FC stocking

Nevertheless, if you want to know more details about the resting heart rate, you can click on this link.

The step and activity data will also be synchronised to Garmin Connect and accessible on the web, not just from the clock, and can be viewed as a daily activity or a report.

Garmin FR35 - Step Report

Garmin FR35 - Step Report

As for the sleep analysis, it is quite basic: simply a summary of periods of light and deep sleep, which you identify depending on your movements while you are asleep.

Garmin Forerunner 35 - Sleep Analysis

In short, all the features you'll find on any activity monitor in the Garmin range, with the exception of the raised floors (as it doesn't have a barometric altimeter), which is an important addition to a watch in this range.

Notifications and connectivity options

The Garmin Forerunner 35 displays notifications on your mobile phone, like the vast majority of watches today, provided the manufacturer is up to the task (Fitbit) or they manage to solve all the problems present with some operating systems (Suunto with Android).

FR35 continues the same path as Forerunner 25, displaying the phone's notifications on the clock screen as soon as it is received.

Garmin Forerunner 35 - Notification

But as with the above, the new Forerunner inherits the menu structure from its big brothers. So now you no longer have to go to a notifications sub-menu to access the previous notifications, but there's a dedicated widget for that purpose. Simply press the scroll button twice and you'll be able to see all the pending notifications.

Garmin Forerunner 35 - Notifications

The notifications you want to see on the clock can be configured from the phone's application. In Garmin Connect, you can select which ones will be shown on the clock screen. So if there are applications you don't want to receive notifications from (WhatsApp or Twitter, for example), simply unchecking it in the menu will be enough.

Garmin Connect - Notifications

And it all works because the watch is permanently connected via Bluetooth Smart to your mobile phone (compatible with Android, iOS and even Windows Mobile). This connection not only displays notifications, but also allows you to automatically synchronize all your activities, both workouts and activity monitor.

It even allows LiveTrack, allowing you to send your training data to family or friends.

Optical heart rate sensor

Garmin Forerunner 35 - Optical Sensor

The main new feature of the Forerunner 35 is the inclusion of the Garmin Elevate optical pulse sensor - the same sensor that Garmin has been adding to its devices since it was first introduced on the wrist a year ago. Vivosmart HRIt is a less voluminous version, which was first seen in the 735XT.

Garmin Forerunner 35 - Garmin Elevate

You have already seen in the activity monitor section that this sensor will provide you with heart rate data throughout the day. In addition, you can also use Forerunner 35 as an external pulse sensor for another device, via ANT+. For example, it will allow you to send heart rate data to a cycling unit (such as a Edge 520This option is activated from the pulse data widget, and when it is running you will not be able to access the clock menu or record an activity.

The display will only show the pulses together with the time of day and the indication that it is transmitting the pulse data.

Garmin Forerunner 35 - Send FC

But the important thing is the behaviour of the sensor. During these weeks of testing I have been able to confirm that there are not many differences from the last time I tested the sensor on the 735XT, and that it has certainly improved over time since it was first introduced. But it is still not perfect,

Here are a few examples comparing their performance with other sensors, both optical and traditional chest sensors.

I'll start with a short activity, but with three strong intervals. As you can see the start is always complicated, for all the sensors. Even for the sensor in the chest.

But once the body has warmed up and I'm in a cruising rhythm, all three sensors line up perfectly. Here Forerunner 35 works perfectly throughout the entire activity, including the interval work periods, which is where the Garmin Elevate sensor has always performed the worst.

In this case it is the Scosche sensor (traditionally one of the best on the market) that suffers in the first interval, nailing the rest of the training along with the other two.

Garmin Forerunner 35 - Sensor Comparison

But it's easy to lose the recording when you do short intervals of high intensity. In this case you can see how both the HRM-Run and the Scosche record all eight intervals perfectly, but the FR35 only manages to measure two at the end of the training.

However, periods of running at a constant pace are not a problem.

Garmin Forerunner 35 - Sensor Comparison

Let's go to another example of continuous running at a constant pace. The chest sensor starts off badly because of the colder temperatures and the dry environment (until sweat starts to wet the band). From there, three perfectly aligned graphs during the whole training.

Polar M600 - Garmin FR35 - FC Comparison

One last example combining both aspects. Again I repeat with the same three sensors, with the difference that the Garmin HRM-Run decided to go out at 7:30 in the morning was too early, and it didn't start recording until the final intervals (sprints at full 150m with walking lap) when I manually paired it from the menu.

But anyway, it was not necessary, as you can see we repeated the same tone as before. Both graphs are perfectly aligned throughout the progressive training. The two straight lines correspond to the stop of the watches between the progressive training and the interval section, it is not an error.

As for the final intervals, in the first one it behaves well, but in the two following ones neither the Forerunner 35 nor the M600 are able to keep up and record the interval with a delay, without reaching the reading of the sensor pulse in the chest. In the fourth one the rise is correct, but it gets lost in the recovery.

Polar M600 - Garmin FR35 - FC Comparison

All this in terms of racing activities. What about cycling? Well, it's always more complicated to register.

I start with an indoor activity done on a roller, so it's a little easier than outdoors, as there is less hand movement, no bumps and no sunlight to make the sensor difficult to read.

There are four tabata intervals, with 4 soft and 4 interval minutes (20s work, 10s rest) and stretching in the central part.

The results are moderately good, except in the part of the stretching, which has some punctual absent-mindedness. During the rest of the activity, almost everything has a good result.

Garmin Forerunner 35 - Polar M600 - Sensor Comparison

But let's go out there. The start is good and promising, but later it gets lost slightly. Although it is able to recover and, in fact, the final work part (10 minutes at over 300W) it does it correctly. Overall much better performance than the Polar M600, which after getting lost in the middle of the activity starts to wander around and does not get back on track.

Polar M600 - Garmin FR35 - FC Comparison

If there's another critical point for this type of sensor, it's in lower intensity gym activities. And not just for the Garmin Elevate, but for any other sensor. If we take the data from Suunto's chest sensor as valid (which also doesn't have to be correct), it's possible to see that neither the Scosche nor the Forerunner 35 match it. Yes, the trend is similar in some cases, but there's no accuracy of any kind.

But I repeat, the values of the pulse sensor in the chest do not have to be correct either, because this type of activity is always more difficult to register due to its particularity in terms of movements.

Garmin Forerunner 35 - Sensor Comparison

Regardless of the quality of the sensor, it is always important to wear it correctly. The watch should be worn firmly on the wrist and always above the wrist bone. Therefore, placing the sensor in contact with the skin in a more "fleshy" area and without it being able to move.

This point is not nonsense. An incorrectly worn pulse sensor means incorrect readings. If you have trouble getting a good pulse log, check how you wear your watch on your wrist.

But you don't have to cut off your circulation either, if you see your hand getting purple you should loosen the strap a couple of stitches. Or opt for amputation, whichever you prefer.


The Forerunner 35 retains the same calling card as the rest of the basic Garmin range - simplicity of use over anything else. But in its annual update it improves on other features - most notably the new sport modes, which make the FR35 more versatile.

The Garmin Elevate is gradually invading the entire Garmin range, and it's already rare to see a model that doesn't include it. In fact, all of the watches that Garmin has introduced this year, 2016, feature this sensor, which is already reaching an acceptable level of maturity, providing accurate pulse data in almost any situation (at least on the run, the main function for this Forerunner).

Of course, there is always a "but". In this case the price. Not because its competition is much cheaper, since among the models with optical sensor only the Polar M200 is slightly cheaper. The main problem is at home, and it is that for a little while longer you can buy a Garmin Vivoactive HR that surpasses it in many ways: barometric altimeter, swimming profile, colour touch screen, ConnectIQ... And the truth is that it's not much more complicated to use.

That's the problem Garmin is having lately, too many models on the market that end up stepping on each other. But the tactic seems to be working for them, so the general trend of presentations will continue.

Maybe they are waiting for the effective arrival of the Polar M200 to the market to lower its price slightly. Anyway, ignoring the price, it is a good device that offers the necessary features that the most novice users need.

Buy Garmin Forerunner 35

I hope that this complete analysis has helped you to decide if it is a valid device for you or not. All the work I do you can consult it without any cost, but if you want to support the web and with it the work I do, the best way to do it is to buy your new device through the links I provide below.

Through these links not only will you get a very competitive price and the best customer service, but I will also receive a small percentage without costing you any additional outlay.

And if you have any questions, remember that you have the comments section at the bottom, where I will try to answer all your questions.

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Thank you for reading, and especially for supporting the page!


Operation - 8.5
Connectivity - 8.5
Design, finish and comfort - 8
Autonomy - 9
Applications - 9
Price - 7.5



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Eduardo Mateos

I've been surrounded by electronic devices of all kinds for more than 25 years. Using them, testing them, taking them apart and dissecting them. Long distance triathlete: I swim, run and cycle for a long time. Maybe too much.

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    1. More than just the number of kilometres covered, you should evaluate the type of training you do. If your outings are for running at a continuous pace and you don't need to prepare guided training sessions or do series, with the FR35 you will be more than satisfied.

  1. Hi Eduardo! One offtopic question (which I know you are very Garmin like me...) about creating custom training sessions in Garmin Connect. We are going to prepare the Seville marathon and a friend has already created the complete plan on his account... is there a possibility to share it with me, export, etc?

    Thanks in advance and a hug!

    1. Can't export/import. The only way I can think of is that you sync your watch with their user account. What I can't confirm is that when you sync again with yours, if the workouts will still be there (my first guess is no).

      1. Thank you! That's what I expected... it would be a very valuable feature for users, although I'm afraid Garmin is not about to open up the system in this way having, as it has, paid training plans...

  2. Hi Eduardo, I've been looking at this full Forerunner35 analysis and I haven't seen anywhere you talk about clock autonomy...
    It was to see if you could inform me about it, what is the duration of its battery, with the gps and optical sensor connected, and what is the duration using it only in basic clock mode (with gps and optical sensor off).

    Thank you.

    1. I can't do autonomy tests like I used to, because when the watch is fixed without movement the optical sensor is deactivated. Therefore, the usual test I used to do is not valid because it is only with GPS and does not include the sensor consumption.

      And of course, doing an activity of more than 10 hours on the move is not viable either. I can tell you that in regular use for everything (training, daily, notifications, etc.) I have loaded it every 6-7 days

      1. Ok ok thanks. I train about 3-4 days a week, and the rest of the time, I'll turn off the gps, so I figure it'll last a little longer.

        And comparing this with the TomTom Runner3, which has more autonomy, both with and without the gps? The tomtom or Gramin?

        Is the optical sensor of both watches the same or is one of them of higher quality and more reliable and accurate?

        Thank you

        1. The Garmin has a little more autonomy.

          As for the optical sensors, take a look at the tests because in both cases you have all the information with graphics and everything you need.

  3. Hello, Eduardo, as usual he plated.

    See if you can shed some light on my doubts.

    I run regularly and am currently preparing for a half marathon (my first time).
    I'm using the runtastic app, the mobile phone and a Bluetooth Ant+ pulse meter, but I want to change or help me with a watch.
    Why, for example, runtastic tells me that I have to do intervals at 5:25 m per km. But the pace data that runtastic gives me is the global one. Of the whole training. So I'm going a bit blind.

    I wanted to know if in the fr35 I can add workouts from the garmin app. And if when the interval comes I can know the pace of the interval that I am and the average. I hope I have explained.
    Although it is not clear to me what types of training can be added or modified.

    I'm sorry about the talk, and thanks for the website.

  4. Hello Eduardo, I know your web since a few days ago and I congratulate you for it first, very complete and with very detailed reviews.
    Regarding this watch, I decided to buy it for my wife (I use Suunto at the moment 😀 ), she has the Forerunner 10 that I gave her 2 years ago and so far it has covered her needs, but the running bug is possessing her more and more, and she is already looking to train and control the heart rate, plus more reliability in GPS tracking (in the FR 10, it fails quite a lot).
    Best regards and I use the web banner for purchase 😉.

  5. Hello Eduardo, compare me a F35 and as I do a lot of indoor spinning, I ask you if the F35 has also in addition to measuring heart rate, the possibility of measuring in percentages % and finally that you recommend me with respect to how to program it in indoor spinning as it is a stationary bike.
    A lot of them already!

    1. It is not possible to select % of FC. For spinning without sensors of any kind there is not much information you can display on the screen. I would select activity duration and heart rate.

  6. Super cool! I bought it and I love it! very complete, I'm already addicted! problem I don't see that they sell gear straps and after a fall I have a bit of a tear in it, all the models have spare straps except this one...I don't understand

  7. Hi. I've seen that all Garmin models (or most of them) have shift belts. I haven't found for this model anywhere... I don't know if it's because it's relatively new or because they're not going to be made. Do you know anything about it? Thanks in advance!

  8. Eduardo would appreciate it infinitely if you could solve my doubt and answer me by mail apart from here... I am not computerized and I do not know if I will be able to return to this page...
    I've been running for 17 years..I've had sport-tool navman(garbage)..Foreruner 201 and I've got the 310 xt..but it's starting to's stuck in pulses and it doesn't nail distances anymore..ask..
    I'm just looking for this..I don't connect to garmin or anything..I don't know, nor do I want to..but I only ask that it KEEPS THE DISTANCES...and that the pulse both in runs of 7-15 kms is stable and in series of 1 km tb..I don't ask for strange do many 10 kms I can do 20 laps and the only thing I ask is that it measures perfectly the distance and that in laps of 1 km or more...that is to say k to rhythms maintained during 3-6 minutes the heart rate measures it well...I do not care if it fails in series of 200-300 meters..but in series of 700-1000 meters if kiero k key distance and connect it neither to mobile nor "gaitas" only for training..a use of 3 hours week...
    My 310xt has been a luxury ... I think 7 years and so far that begins to fail a luxury ..
    Knowing this... I'm looking to nail down distance and pulse in lapses of more than 3′ and maintained rhythm I hesitate to buy
    Or again the's a gift...or the 910 xt...or the 235 or the 35...I like the 35 for the price but I have doubts...porfi un cable...

    1. It's impossible for a GPS to pinpoint distances. Technology doesn't allow it and there isn't and won't be any device that does. For what you're looking for, the simplest is the Forerunner 35.

  9. Hi, I returned an apple watch series 2 because of your opinion. I'm a student at INEFC and I'm considering the possibility of obtaining this watch. Two questions: water resistance? can you use the timer without doing any activity?

    1. Water resistance is no problem. As for the stopwatch, you would have to start an activity, but then simply not putting it away is enough.

  10. hello eduardo. for running indoors fr35 works? it's the same as fr25 but with an optical sensor? thanks

    1. Yes, no problem. You can turn off the GPS and count the pace and distance with the internal accelerometer.

  11. You know how the weather is connected, the weather I mean, I don't know how to put it and I don't see anything anywhere in the application.

  12. Hi, Eduardo!
    I'd like to ask your advice. I have a Polar RC3 and I want to switch to a model with a wrist pulse meter.
    I usually run 3-4 times a week about 15 km a day. I schedule workouts by pace and I like to keep track of heart rate (I don't do tempo workouts).
    I want to use the heart rate monitor all day (the Polar is uncomfortable for daily use as I have a small wrist).
    I hesitate between the Forerunner 35,235 or the vivoactive hr.
    What do you recommend? A greeting and thank you!

  13. Hi Eduardo! First of all congratulations for the blog, I discovered it just now and it's brutal the amount of info you offer.

    I'm hesitating between the Forerunner 35 and the Tomtom Runner 3 Cardio. I use it for amateur level, with running 3 or 4 times a week, some biking and I want to incorporate swimming. I don't need to schedule very elaborate workouts, but I do need both GPS and pulse measurement to be accurate. Is the swimming mode offered by the tomtom useful? For other activities such as fitness, is there much difference between the two? Since tomtom offers multisport in that sense.

    Thank you very much in advance!

    Best regards 🙂

    1. If you're thinking of swimming I'd rule out the Forerunner 35 and go straight to the Runner 3.
      The swimming pool profile is not overly elaborate, but is perfect for simple and basic use.

    1. I personally don't have any problems with them and I train without any problem, knowing that for cycling or series I may need a chest sensor if I want more accurate data.

  14. Good evening. A great analysis that has helped me to decide on the purchase, which I will do for your links, of course! A question: I imagine that yes but... can it be charged with a plug like the ones used to charge mobile phones? Directly to the electrical installation?
    Thank you very much and congratulations on your blog

  15. Well, I just bought a Garmin Forerunner 35 and I'm pretty happy with it so far.
    But I've noticed that on the recorded GPS routes I'm always about 5 or 6 meters off course, so it seems like I'm going on the road instead of the walk and stuff like that. I'd like to know if this is normal or if it's a failure of my device.
    Thank you very much in advance

  16. Hello!
    Thank you very much for the information, a complete analysis!
    I'm a rookie at this watch thing.
    I run 35-40k a week, I do series, I run in the country, huincha and city.
    I bought an FR 35 recently...
    I noticed that the FC in 40 mts. series in slope is not able to give them correctly...
    The other thing that seems doubtful to me is that in indoor races on the huincha it seems to mark more distance and therefore more rhythm than the real thing.
    If the treadmill says 4.5k... the clock already says 5k...
    Thank you

    1. 40 meters is too short a distance to appreciate anything in the heart rate.

      As for the tape, the measurement is by accelerometer, the percentage of error is higher than on the street. Anyway I would not trust the calibration of the tape at all.

  17. Good one, Eduardo.
    First I wanted to thank you for the great analysis and description of the "Garmin Forerunner 35".
    I do triathlon and I was given the PolarFT4 as a present to get into this heart rate thing and the rest of the family. Well, I have seen this watch and aesthetically I loved it so I started to find out about it. I have seen that there are many people who complain about the unreliable optical pulse and I wanted to know if it could be connected to a band so that I could have a more exact measurement of the heart rate or at least that it wouldn't make me doubt. So, what kind of band would be compatible?

    Greetings and thank you very much.

    1. Of course, you can use an external sensor - it would have to be ANT+ compatible, so you don't need Polar's.

  18. Hi Eduardo, thank you very much for sharing your report. Question: I have a 6 months running history in the Nike+RunClub IOS application... could you tell me if I can pass it (and how) to Garmin Connect? I just bought the FR 35 and I would like to unify the history with what I will do in the future...
    Thank you!

  19. Hello Eduardo, I wanted to buy a watch of this type, but I have doubts since my main activity is cycling and I do not know if it will be comfortable or better with a band on the chest and that can be put on the handlebars, thanks.

    1. For cycling, I recommend a chest sensor, but that doesn't mean you can't have a watch without an optical sensor. You can use it every day with your optician, and switch to the traditional one when you cycle.

  20. Hi Eduardo, excellent article. Congratulations for your analysis and clarity. I received a forerunner 35 as a gift, can I use it for indoor swimming and if possible how it should be configured. Thank you very much

  21. hello, my forerunner 35 clock has the bluetoth option, but when i go back to the menu to activate it i see that it says on. i don't know what it has

  22. Hello, I have seen your analysis and I liked it. One question I am very interested in this device, I don't do programmed trainings, neither for now I am preparing any competition. I want to start to use these devices, normally I do a couple of days of mountain bike and another one I go out to run. I would like to control simply times, distances, to be increased performance little by little. For having information, as I have commented you I don't plan to prepare competitions.
    I will use it more in mtb, although to record the routes I use the Touring, can the two be synchronized?
    Thank you

    1. Yes, both devices will send the data to Garmin Connect where you will have all the details of your activities, but the activity history of each will not show the activities of the other and vice versa.

      1. Thank you, do you see it as valid for what I want? I think it's also valid for planning training, and even if it's less than 235 it's valid for me. I had thought of a Polar, but having the Touring I get all the activities in Conect and I don't have to carry two platforms.

        1. The FR35 is not compatible with advanced training, so if you are interested in this feature you should go to 235 minimum.

          The FR235 is sure to appear in the offers of the Black FridaySo I recommend you to keep an eye on that page because I will be posting the different promotions that are available in these two weeks.

  23. Hi. First of all, congratulations on the website. My question is this: I've been running marathons for years, but I've never done any training based on series, I just go out and run.

    This year I wanted to try more elaborate training, with series and so on, and I wanted to buy a Garmin, but I hesitate between 35 and 235.

    I've been recommended the 235, but I don't see much difference from the 35, beyond the fact that I can program 4 screens instead of 3, which is touch, and details like that.

    With both models I can program trainings, series,... so what practical improvements do I get with the 235 over the 35?

    Thank you very much and best regards.

    1. What you can't do is prepare complex training sessions, just simply by using the clock. This is where the FR235 stands out.

      If you plan to start doing this kind of training regularly I would definitely go to FR235, you'll appreciate it. And with the price tag it has today I think it's the logical choice.

      As for the screen, it's not tactile on either one.

      1. Thank you very much. Could you give me an example of training that can be programmed with the 235 and not the 35, please?

        A salute.

  24. Hi Eduardo, congratulations for your analysis of this watch. I am a cyclist and I usually use the Garmin Edge 520 with a pulse tape on my chest. I am thinking of buying this watch to wear it also on the handlebars with pulse data and leave the screen of the Edge only with the information of Strava sections and watts. Could you transmit the tape that I have ANT+ the pulse to both devices at the same time? Thank you very much in advance.

    1. The advantage of ANT+ over Bluetooth is that one sensor can send data to any number of receiving devices.

  25. Hi, Eduardo!
    Thank you very much for your article, I find it very good information and very complete.
    I recently bought a FR 35 watch and I was just about to use it for the first time but now the screen only indicates "Software update" and does not allow me to use any other operation and it has been like this for almost a whole day, is it normal or how long does the update take?
    I hope you can support me with my doubt.

  26. Hello,
    I'm starting to run and I'm looking for a running clock that gives me the rhythm of the race (the minutes it takes me to do a Km) as well as the total Km and how long it takes to do it. And that doesn't use a band to measure the pulses. My short term goal is to run a half marathon.
    Between the Polar M200, the Garmin Forerunner 35 and the Fitbit Ionic, which one do you recommend?

  27. Hello,

    I am interested in buying a garmin but I hesitate between 235 and 35. I am starting to run and I would like to keep track of the starts and their progress. I would like to do without the mobile phone in the starts. I am interested that I can see my progress in some application (right now I use sport tracker in the mobile and I like very much how it offers the data and the amount). I think that the 235 automatically updates data of each start in the Garmin application and the 35 does not, you have to do it by connecting the equipment to the pc.

    I'd also like to use it as a daily watch; I don't mind if it doesn't warn about whatsapp and so on.

    Taking into account what I say, do you recommend the 35 or take the leap to the 235?

    1. In both cases you will have the basic data and both are synchronized via Bluetooth with the mobile phone. The difference is that the FR235 supports more personalization and has more metrics in addition to supporting the creation of advanced training. Read the proof of both because everything will be completely clear.

  28. Hello, I can't understand how it works when I select a screen that tells me in the heart zone that I am, I get a decimal number and not a zone like 1 or 3.
    Could you explain to me how to get to know the area I'm training in?

  29. Hello, good afternoon. It is possible to store data from the gps and how reliable the data is, is a function that seems to me too basic and useful, not only the tours.

  30. Hi Eduardo, between this and tomtom spark 3 cardio, which one do you recommend? My idea is just to run and have my heart rate, time and distance controlled. I don't think I will use it for more. Also the garmin has notifications but good. The truth is that it took me a few days to see which one I would choose and I can't do it. A greeting and thanks for helping.

  31. Hello from Mexico.

    What do you recommend to buy this model Garmin 35 or Polar430?

    Thank you.

  32. Hello
    I have a gamin foreunner 35. When I run or ride my bike the clock rings every 15 seconds notifying me of low fc's for more than the pulse is at 140.
    Thank you very much.

  33. Hello,
    my fourerunner is turning off the screen by itself and then goes off again.... What can it be? I bought it at Decathlon a year ago and where do I take it to repair '
    Thank you for your help.

  34. Congratulations on the analysis.

    I would like to charge the Forrunner 35 by connecting it to the network through the USB cable that comes in the box and a USB network plug, however, I can't find anywhere, not even in the manual, specifications of the output voltage and Amps that the plug must have in order to charge it.

    Do you know this data or where I can see it? I've looked at Garmin specs, but I can't find it.

    1. It's the same as any mobile phone charger (5V). You can use the one you're using right now without any problem.

  35. Good afternoon, Eduardo,
    I'm in doubt when I read that the Garmin Forerunner 35 doesn't have a barometric altimeter: isn't there a possibility to see in the Garmin app or in Strava when synchronizing the data the difference in level during training?
    Thanks in advance!

    1. Yes, you will have that data in both without problem, and corrected with mapping values. What you will not have is correct data throughout the training.

  36. Thank you for the analysis. I only have one question left to clear up. With the garmin 35 I can see in real time, while I run, on the screen, the cadence of steps per minute... And without the need of any additional device... Thank you.

  37. Hi, Eduardo. I wanted to ask you if Forerunner 35 counts the kcal burned during a weight training session. Greetings and thanks.

  38. Good morning, Eduardo:
    I've had the Fr35 for a while now and would like to use the chest strap in some series training.
    Once it is linked to the Fr35, and placed on the chest, what does the watch record? The band or the optical sensor?
    Should I override the sensor every time I use the band?
    Thank you very much for the article.

    1. When you have an external sensor, the optic is automatically switched off. And when there is no sensor, it is the one used by default.

  39. Good evening, I've been reading your analysis and I loved it, a doubt I have, I already have a polar m200 and I've been given the forerunner 35, I usually go out 2-3 times a week, I use it to see pulses, I don't train by pulses, and race rhythms, the garmin I've seen that it has more drums and that I can program the series in the clock, which do you think is better? sometimes I go out for mountain but I don't mind seeing the difference in level when I turn the information over.

    1. Both are very similar models, within the basic ranges of each manufacturer. The main difference of Garmin is that its screen has much more resolution. The Polar has some more function, but the Garmin screen is better.

  40. Good afternoon, can the forerunner 35 controls be activated in the water? Or is the watch simply waterproof when not in use?

  41. Hello Eduardo, today July 2019, you could recommend this forerunner 35, it would be my first garmin watch, I would use it for running and mountain biking.

  42. Hi, I have a question, does the screen scratch easily, is it advisable to put a screen protector, the watch arrives next week but I read a negative comment that said that the screen was just as fragile as the mobile and with a simple blow against a door or a wall would break 1TP10Could you give me your opinion? Thank you.

    1. The lens is made of glass, so it won't scratch easily in everyday life. Obviously if you hit it against a wall or drag it through it, it will scratch. But it's within reason, isn't it?

  43. Hi, Eduardo:
    I have a little problem with the Fr35: When I run in an athletics track the gps gives me some data, in terms of altitude, very strange. and out of place. In 10 kms it gives me a difference in altitude of 300 mts. It marks a very regular pattern of ups and downs. It happens to me always and in several tracks. Why is that?
    I compare my data with other users on Strava from the same day and place and see that theirs is consistent (8 mts in those 10 kms...)
    Thank you very much.

  44. Hi Eduardo, is this model compatible with the Garmin Bike cadence and speed sensors?
    Thank you for your attention, best regards

  45. I've had the Foreruner 35 for more than 3 years and I'm thinking of buying a chest strap because I want more precision for my training, especially when I'm cycling on the road.
    Which external sensor, chest strap, do you recommend for this watch? .... does it have to be garmin? features?
    Thank you very much.

  46. Hi Eduardo! First of all, congratulations for your blog, it's amazing the work behind each post and the help you give us. Secondly, I wanted to tell you my case to know which watch to choose (I can use any brand, except Polar because my experience with it is not very good). I am a competitor and I like to do sports (I do 6 days a week if I can), mainly running and gym (now at home). I am looking for a watch that will work for both specialties, especially to increase my running pace, as I would like to run a half marathon in a year and a half. I would also like to know if the garmin buttons are easy to use (I think the touch screen is easier).

    Thank you very much in advance!

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