Polar M430 | Test, analysis and opinion

Despite just landing on the market, the Polar M430 seems to have been with us for several years. It looks like a simple renewal of the successful M400 that became a sales leader in 2014. Certainly three years is an eternity in the world of consumer technology.

The first impression you might get is of a product that has been relaunched with slight improvements, as if Polar were trying to renew a product at the end of its commercial life to try and squeeze it a little more.

Nothing could be further from the truth. Yes, at first glance everything is the same, but inside almost everything is new, presenting itself on the market as a totally solid device from the beginning, without the inconveniences always present in the models that have recently arrived on the market. Therefore we are faced with a new watch, but at the same time mature in its firmware as it is the renewal of an existing product...

Without any doubt, the main novelty of the M430 is the optical pulse sensor. Polar is the only manufacturer that, depending on the product, chooses to mount a different sensor, as they have several in the catalogue. For the M430 the choice is its top of the range, a clear sign that the Finns are serious about their bet.

But the list of new features doesn't end there: vibration, new GPS chip, new battery saving modes, much more elaborate sleep metrics and other small changes that I'll go into in detail. The Polar M430 is first and foremost a watch designed for racers, and that's what I've focused on (although of course I touch on other sports).

The watch you see here is a test unit provided by Polar. As always, the watch will be returned to Polar, so there is no compensation from them. All my opinions are always free of any pressure, as I do not depend on the manufacturers at any time.

You are the ones who allow this page to keep working with your purchases, so if you like the work I do and want to keep seeing this type of item, you can help by buying through the links I provide (whether it's the M430 or any other product you like on Amazon, any help is welcome).

I won't dawdle any longer. Let the show begin!

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Contents of the box

The Polar M430 is offered in three different colours (at least for the moment): the classic black and white and as a new addition, the colour orange.

It's funny that Polar has changed the outside of the box, but still keeps the same sticker for the display, but now some of its main features are highlighted, such as having a pulse sensor integrated into the wrist.

The back offers some more information, clearly specifying that it is a watch for runners, and you can see that it is compatible with Strava and Training Peaks.

But let's go inside the box, that although the packaging is quite attractive what we are really interested in is what we find inside.

And it's not much, three things to be exact. The watch, a USB cable and a few papers that serve as a quick reference guide.

To the naked eye, the M430 is exactly the same as the M400. Only the most trained eye will be able to identify the new model (if we ignore the inscription on the front).

The new strap gives it away. It's now made of a softer material and is perforated. It has reduced weight to provide better performance for the optical pulse sensor. And it's actually much more comfortable.

If there are no big differences at the front, it is at the back of the watch that we can easily determine that we are looking at a different model. First of all because of that kind of black photo lens, surrounded by six LEDs to be able to see through the skin. But the new connector also stands out.

That's right, Polar has changed the microUSB connector that gave so many headaches in the early versions of the M400 and replaced it with a proprietary connector. I would have usually told you that switching from a universal to a specific connector is a bad move.

More cables, more complications to charge... but in the case of this Polar it seems perfect to me. The connector that came with the first version was a source of problems. First with cover, then without cover, several warranty problems... This new connection solves all those incidents in one go, with a very resistant and durable look.

And what about the buttons? Well, everything remains exactly the same. Three on the right side with a predominant one marked in red, which is the one you will use to start activities and move around the menus.

And two on the left side, which will allow us to exit the menus or turn on the lighting, among other functions.

As you can see, there are many areas where the clock hasn't changed. So let's go with the things that have.

New features of the Polar M430

At first glance there are no big changes to be seen in the new Polar watch, but as they say, happiness is in the little things, so here is the list of what's new in the Polar M430.

• Optical Pulse Sensor - Mainly new and quite obvious. It will allow you to provide heart rate data during your workout, not throughout the day (at least for the time being).
• Possibility of carrying out the fitness test with the optical pulse sensor, without needing the chest sensor. This is a remarkable change, as pulse variability comes into play, something that optical sensors do not usually offer. The result of this test is comparable to your VO2Max.
• Notifications through vibration, replacing the sound warnings. Now instead of having beeps to warn you of turns or other events, you will have a vibration. It would not be bad to have bothbut I guess we can't have it all...
• Timer function is added, not present before.
• Change in the connector, replacing the microUSB used in the past and that caused so many problems in the first M400 by a proprietary one much more resistant.
• Firmware update via Bluetooth, without the need to connect to the computer. Perfect for those who only have a mobile phone and no longer use a computer at home. And that's because, with this watch you don't need a computer at allOr almost nothing, if you need to create a training program.
• New clock faces to be able to select on the time display.
• Advanced sleep quality measurement.
• Modified belt design, reducing weight and allowing for a better fit, both with the optical sensor in mind.
• Larger battery, although theoretically the range remains the same as in the M400. This extra capacity is used to power the new optical pulse sensor.
• Battery saving modes, allowing to reach up to 30 hours of autonomy using GPS. There are three modes that I will detail later.

As you can see, there are many more new features than you might think at first glance, and before going into detail on some of them, I will refresh your memory with everything the Polar M430 has to offer, which in its basic operation is the same as the M400 (you can see the proof of this one for more details)

General operation

I do not want to dwell on this section too much, because in its general operation there are not many changes with respect to the Polar M400.

Although the main focus of the Polar M430 is on running and running, it allows us to add a multitude of sport profiles. This is managed via the web or the mobile application (remember, you don't need to have a computer at hand at any time). You can have up to 20 different profiles synchronized on your watch, which are shared between the different Polar devices in your account.

And each of these profiles can be configured independently, with the settings that you think are necessary in each of them, including the data screens.

These training views allow you to select up to 4 data points for each view. The display size varies depending on how many values you have selected.

While we are training we can make use of the zone blocks, both for rhythm and heart rate. To do this you must first define which zones you want to have for both cases (or accept those suggested) and activate their use, all in the configuration of the sport profile on the web or in the application.

What is this for? So that you can "block" a zone during your training. For example, imagine you want to do 1km runs suffering in HR zone 5. You simply define your zones and when you are running and it's time to start interval work, you hold down the red button to lock the zone you are currently working on. And the same for the pace.

Once the area is blocked, the clock will warn you with vibrations when you are outside the area, both above and below it.

The "problem" is that the blocking must be done when you are already in that zone. That is, if we take into account the values of the zone selection above, if you want to do work in pace zone 4, you will have to block the zone when you are at a pace lower than 4:00 min/km, not before.

From that moment on, the goal is to keep you in that zone. If you start running slower than that 4:00min/km, the clock will vibrate to warn you, and if you go below 3:09 (again, the default zones you can see above, you can set it to your liking), too.

It's a different way of approaching a training series, but the truth is that it's quite practical, especially because you don't need to have a training series prepared and pre-loaded on the watch, but still have a guide to know if you're complying with the training without having to constantly look at the watch.

But it's not the only way to train. You can create a guided training in the application or on the web, for example a fartlek session.

10 minute warm up, 400m series in zone 4 or 5, and 200m rest in zone 2. This is a workout I created in a matter of two minutes. Once synchronised, it will appear in the favourites option.

As you go through the different phases of the training, the clock display will indicate what you need to do in each of the phases.

But it's not the only way to train. Polar also offers different training programs for 5K, 10K, half-marathon and marathon, which will be created in one way or another depending on the options you set when you configure it.

But no one better than Polar to explain it.

It does not replace a coach to make you a tailor-made program It's an interesting option for watches in this price range, since not all of them offer it. But it is found in the M400/M430, and it is not simply an option that allows you to access a workout, but you can download it to the watch and access the agenda to perform each session in a guided manner.

Let's go with other things. Among the data you can select for the displays is the cadence. Initially the Polar M400 did not offer this option, unless you paired a pedometer, but later the possibility was added through a firmware update. The M430 now comes with cadence detection on the wrist, which also adds the possibility of obtaining pace and distance for indoor activities (eg running on a treadmill), something that was never present in the M400.

After finishing the training, the summary screen will be presented, and it's quite complete. First it will show if you have achieved any personal records. At least, recorded by the clock. So at the beginning everything will be records.

Among those details is what Polar calls "Training Benefit". This function provides indications of how your training has gone, giving information on what effect the training session you have completed has had on your body.

It is based on the heart rate zones you have been using and how much time you have spent in them, which also appears at the end of the activity.

And of course the rest of the details: calories, distance, time of each lap, etc. And if it is a varied and intense session, you will also see the "running index". Or, in other words, the estimation of your VO2Max, although I have personally found that it varies a lot in a very short time.

Of course, you can do the same analysis in the application or on the web, where you can see all this summary data and more.

And if you prefer to use other platforms for your training, Polar offers the possibility to export the activity file in a standard format such as TCX.

Although we must not forget that there is automatic export to the main platforms such as Strava, Training Peaks or MyFitnessPal.

When competing at some distance Polar has kept the end time calculator, a function that was also introduced on the M400. Operation is simple, simply enter the distance of the race you are going to run (5K, 10K, pre-set half and marathon or any other distance you enter) and you will see a new screen with the estimated end time at the finish line, the average total pace and the remaining distance.

It's another way of turning the virtual partner feature around and makes it very easy to see if you're going to beat your best mark for the distance at the pace you're running.

New to this model are the stopwatches, something that was not present on the M430.

Finally, remember that the M430 has activity tracking, so when you perform the initial setup it will ask you for information on how your day is going (to assess whether you spend a lot of time sitting or have a habit of living with more movement, due to your work).

In the clock itself you will be able to see on different screens how you feel about your target, for example on one of the new clock screens.

But also in the "My Day" menu.

There is not much information that you can consult on this option, beyond the calories consumed (which include basal calories) or the steps taken.

It is in Polar Flow where you can see the daily activity information in more detail.

Although in this case it is true that the information is more detailed on the web than in the mobile application.

It also has a more detailed sleep measurement, one of the new features of this M430 compared to the M400. So let's take a closer look at what this new feature is.

Sleep measurement

Sleep measurement is another new feature of the Polar M430 (also present on the A370), not because it is new, as the M400 already monitored sleep quality, but because it now offers much more detail than was available on previous Polar devices.

Before you only had the total time of sleep, while now you will have much more detail of how the night has been, both in time that you have slept and in the quality of it. This information will be available both on the web and in the mobile application.

In the first image you can see how he has identified all the details, and also in a quite precise way. For example he has correctly identified that, although I was in bed watching a movie, I didn't really fall asleep until later. Around 1:28 fits quite well with reality.

In the same way, I woke up for the first time around 8 a.m., but I tried to sleep a little longer. You can see how around that time there is a lot more movement.

The following screen graphically indicates how the night has been. The circle would be completed if you reached the recommended 8 hours of sleep. It also assesses how much sleep has been real and whether there has been continuity or too much restlessness.

The application will ask us how we slept to add it to the sleep feedback screen.

Of course, you can view the data on a weekly basis to see trends.

In general, all athletes forget that rest is just as important as training, and that resting properly is crucial to better performance in training, to recover from exertion, and to stay in shape.

The new Polar M430's sleep tracking is quite good. Not only in correctly recording the times of going to sleep or waking up, but in presenting it in a way that is easy to understand. Of course I can't guarantee that when it says I had a restless sleep I did, I wasn't "present" to attest to it. But the important thing is that the information provided is easy to digest for the average user, and I think Polar has done that by showing the information in a very clear way.

Polar M430 optical pulse sensor

Without a doubt, the main novelty of the Polar M430 is its optical pulse sensor.

However, unlike other competing models (or the A370 wristband itself), the pulse sensor will only work when you are wearing the watch for training purposes, using a sport profile.

Outside of sport mode it will only track activity, but will not include heart rate data. Clearly this is an important difference from what other competing products offer (and is becoming a basic feature), but Polar indicates that it will be included in the near future through a firmware update.

- Update -

Polar has updated the M430 firmware and already offers constant heart rate monitoring, showing maximum and minimum of the day. This same update also offers improvements to the sleep tracking mode.

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There is a possibility to display your heart rate at any time through the "My HR" menu, but for the moment the data you get there is for your eyes only, as it will not be synchronized with Polar Flow and is not recorded in the watch.

But we must not forget that in the end the most important thing about the optical sensor is to see how it behaves while we are doing an activity. There have been a few training sessions in which I have been testing the Polar M430, always together with other devices, so here are the results.

I'll start with an easy workout, steady paceIt's where you get the best performance from an optical pulse sensor, so if in this simple test something goes wrong... bad business.

You can click on the links for each of the training sessions to access the comparison and draw conclusions for yourself, and you can also increase the size of the images by clicking on them.

Let's go with an overview of your workout, comparing the data with the Garmin Elevate sensor on the Garmin Forerunner 935 and the Garmin HRM-Tri chest sensor.

 

As you can see, the result is very good during the whole training, with three perfectly overlapping graphs. There is some point where there is a small difference, like here around minute 20.

Or later on in the 25th minute.

The result is what you would expect, three sensors that have measured perfectly. As I say, it's the simplest test.

Where it's easiest to find discrepancies is when performing series and intensity variation trainingAlong with cycling, it is the Achilles' heel of optical sensors.

 

As you can see, at first glance the result was quite good for all three sensors (the same ones used in the previous test), but let's look at each of the intervals separately.

In the first interval we can see that the start of both optical sensors is a little slower, taking a little longer to reach the sensor's registration in the chest, but once they coincide in the graph, they remain totally stable until the end, where we can also appreciate a small delay with respect to the sensor in the chest.

In the second interval you can see how the situation repeats itself in exactly the same way.

And in the third...

And also in the room.

It is not a perfect measurement during the 100% of the training, but saving those punctual moments where there is a slight delay (behavior that also happens with the optical sensor of Garmin), the result is frankly positive.

These are "easy" series. I put that in between because in reality the intensity changes are not easy for the optical sensors, but there are workouts and "workouts".

Let's go with one of the most difficult tests you can put on an optical sensor. Even the sensor in the chest has records that are not correct. Basically, to make you understand the exercises, this is what I did in this training:

• Warm-up at a gentle trot.
• 4x series of 250m preceded by 20 push-ups on the floor (therefore, wrist flexed), with 2 minutes of rest standing up, that is, very fast rise and fall of heart rate and without maintaining it.
• Rest at a gentle trot.
• 3x series of 200m preceded by 40 twin exercises, with a standing rest of 1:30. Same conditions as above.
• 3x 100m series with 30 second rest.

Here they change the actors a little bit, replacing the Garmin with Suunto Spartan Sport Wrist HR.

Well, the start is perfect on the Polar M430 (the Suunto with the sensor on the wrist has been completely lost). As we have seen before, the Polar has a slight delay when the intensity changes. In the first four intervals, ignoring the delay, it has a quite good result. Again, it is quite good for the Suunto.

After the rest at the trot, results are much more regular. The first two 200m intervals he is still catching his breath (me too) and is late and short in all measurements. The third one is already improving, although he behaves quite irregularly again in the 100m series. But much better result than, for example, Suunto Spartan Sport Wrist HR, which has suffered quite a lot during this session.

The final evaluation that I can make of the optical sensor of the Polar M430 is quite positive. It is not perfect, because there is no sensor that is (even the chest ones have problems from time to time), but in the race it gives good results, and even allows some abuses in the series and very fast changes of pace.

And although it's a watch that's mainly geared for running, don't forget that Polar allows you to set up many different sport profiles. There's another kind of sport that's usually quite complicated for the sensors on your wrist, and that's cycling.

A fresh start with something easy. A indoor roller trainingThere are no vibrations, the light is much less intense and we hardly change our hands. I know that many of you do spinning classes at the gym, so this type of condition is quite suitable for classes of this type (although I haven't made so many changes in intensity).

 

And just like with constant pace training, we have three beautifully timed corners, comparing the Polar sensor with the 935's Garmin Elevate and the Garmin HRM-Tri chest sensor paired with an Edge 520.

So... let's go outside and trainThere are more conditions to consider here. There is much more variability in the intensity of the exercise, a fair amount of sunshine (so the sensor zone can receive sunlight when you move your wrists) and the vibrations of the road. For the occasion I am taking a total of three optical sensors: Polar M430, Spartan Sport Wrist HR and Scosche RHYTHM+.

Training on a time trial bike helps a lot, since when you pedal in a coupling most of the way there is not so much movement of the wrists and the vibrations fall mainly on the elbow and reach the wrist quite damped.

The result is remarkable in the three optical sensors. Really good during the hour of pedaling.

There are points where the curves don't match, but there's not much difference.

I say again that I don't expect perfection, because there isn't going to be one, but the result of the Polar here is also frankly good.

Another highlight is that the M430's optical pulse sensor can be activated during swimming training in pool or open water, although in neither of these two sport profiles will you get rhythm, distance or other metrics.

But you will be able to record the duration of that activity along with the heart rate. And with a pretty good result, as you can see in this open-water training in which he was carrying a Garmin HRM-Swim sensor.

GPS Reception

The M430 may look almost identical to the M400 on the outside, but inside it's almost all different. Polar has changed its GPS chip supplier from the Swiss-designed U-Blox to the American-made SiRFstar IV. That means they weren't satisfied with the performance the M400 offered.

It doesn't mean that the previous chip had any problems. It's true that the M400 wasn't the best at receiving GPS signals either, but the change of chipset doesn't necessarily have to be for this reason. There could be many more things at stake, such as battery performance or simply more knowledge on the part of the developers (it's the same chip they use in the V800 and which they get very good performance from).

But the chip is only one part of the equation, probably the least important one, since here what counts is the antenna and, above all, the firmware's capacity to process all the data. This is what separates a mediocre GPS from a GPS with a good performance. Therefore the best thing is to go into the analysis of the different trainings I have done using the M430 accompanied by other devices.

As when I talked about the optical sensor data, you can click on both the links and the images to see more detail.

In this type of test, what I look for is behavior in turns, passing through complicated areas or simply, places where there has been strange behavior. Because analyzing long straights is not of great interest either.

Let's go with this first race, going up and down the beach.

From a bird's-eye view there are usually not many problems, from a distance everything seems perfectly aligned. In this case you have to look at the purple line, which is the one corresponding to the Polar. In red the Garmin 935 and in blue the Garmin FR230.

Here you can see the effects of running alongside a wall. None of the three devices are positioned correctly, but none of them have strange jumps. This is where the signal processing I was talking about before comes into play, as it is the most important thing.

In this kind of areas where there are complications it is perfectly normal that you do not mark the exact path and move a few meters from the real zone, but it is still a more or less straight line and a fairly good correlation with the line actually followed. The problem would be if there were constant jumps on both sides of the road, which would cause a multitude of meters to be added at the end of the training and, above all, a rather irregular rhythm reading.

Here you have the same image in map view. You can see how in the lower part of the image the three lines were perfectly aligned, but as soon as the wall area arrives the problems appear.

And as soon as the open zone arrives, the three of them line up again perfectly

Turning and descending towards the sea, with the Polar being the one that best represents the curve.

Something we can see repeated.

However, at the exit of this bridge under the motorway it is the Polar that later reacts.

Here the M430 has performed quite well, at least as far as 2D positioning recording is concerned. Recording altitude data without a barometric altimeter is another matter.

Let's go to another workout, one that we've seen before with changes in intensityHere the line of the Polar is the red one.

At this point the M430 is the one that behaves best, not only because it is the one that represents the curves most cleanly (and true to reality), but especially because it is the only one that takes the same road exactly the same way to and from the road perfectly, under the tree line.

But not everything is always perfect. Like all GPS watches, the M430 is also capable of getting lost on some stretches of the road.

On a bicycle everything is usually much nicer from all the devices. There is no movement of arms and they are almost always placed in the same position, and at least on the road there are usually no problems with trees or buildings.

There will always be places that are slightly displaced from the actual passing area, but remember that we are not talking about precision measuring devices, but a GPS clock worth just over 200 euros.

In short, the M430 gives a good overall result. No, it is not perfect, but there is no GPS watch that is. Quite in line with other similar devices and I think improving the result of the Polar M400 that it replaces.

Polar M430 battery life

There's another new addition to the new M430. Polar has included two new battery modes, capable of providing up to 30 hours of battery life with GPS use.

Far from being a novelty in GPS watches, it is a novelty among the models in its price range. It is true that we had already seen it in Suunto or Garmin models, but only in the high range. Polar therefore integrates it in a model of the medium or economic range and surpassing in a few hours the similar proposal of the TomTom Adventurer.

Until now, Polar allowed each sport profile to be configured independently, but the options were GPS on or GPS off.

I mean, it's either yes or no. But on the M430, there's a better chance.

Two modes are added, the medium accuracy mode and the power saving mode. By choosing between these options you will be changing the time between each GPS position recording. This does not affect at all the use of the optical sensor, which will record data every second. This is the difference between each of the modes:

• High accuracyGPS position: Records GPS position every second, the usual mode for most watches. Polar indicates that in this mode the range is eight hours.
• Average accuracyGPS recording every 30 seconds.
• Energy saving, long sessionFinally, power-saving mode will take GPS data every 60 seconds, extending battery life by up to 30 hours. And remember, the optical pulse sensor is not affected by these modes, recording pulses at all times.

In addition to choosing the GPS mode for each exercise profile in its settings, from the web or the app, you can also do this directly from the clock, so if for whatever reason you want to change this at any time, you can do so in the advanced settings of each sport profile.

You can access this menu by pressing and holding the upper left button (the one that turns on the screen illumination) on the GPS search screen.

The mode you'll want to use for your regular workouts will be the high-precision mode. Unless you regularly work out for more than 8 hours...

So, when to use these energy saving modes, for example for races where you will be in the mountains for several hours (mountain marathons) or ultra trail competitions.

Logically the location accuracy and quality of the tracks will be affected, since instead of getting 60 points per minute, you will now have 2 or 1 point per minute. But the other option is that in the middle of the race you will not have any points, which is worse...

This is all on paper, so let's go with the real evidence

The case of the Polar is also special, because when the clock is very low in battery, instead of turning it off completely what it does is to deactivate the GPS and continue recording other data. Therefore I'm not going to show you an exact time, but we can see it through the altitude graph. The moment the clock stops recording the altitude is the moment the GPS has been deactivated. And that's the point I mark as exhausted autonomy.

The test is done by leaving the watch recording an activity in a fixed location, so it's usually the least demanding. If you're running through areas of complicated coverage, this figure is likely to be reduced.

In the high precision mode I managed 9h 20m until the GPS is deactivated, not bad, as it exceeds the time set by Polar by more than an hour.

But after testing in the advanced battery life modes there are some things that don't add up. In the 30s usage mode I got a little over 32 hours, when the theoretical maximum using any of the battery saving modes is 30 hours.

And if we go to maximum savings mode, it's over 36 hours.

So I have two theories, either Polar has preferred to make a somewhat short estimate so that when there is more demand for use the battery does not reach the indicated specifications, or when there is no movement the consumption is somehow reduced.

I did confirm that the optical pulse sensor is still operational. This is something that at Garmin, for example, makes it impossible for me to perform a battery test, because after a few seconds without movement the sensor turns off. But this does not happen with the Polar.

However, there are two new modes that extend the battery life, which, as I explained, will reduce the number of GPS points recorded, so keep this in mind when using this option.

View Polar M430

If I'm honest, the first impression I had with the M430 was of indifference. The first impression it gives is that it's the same M400 with some new features and the integration of the optical pulse sensor. Externally the upgrade doesn't offer much interest, and that's its biggest flaw.

But during these weeks of use, every day we spent together I appreciated it a little more. Although it looks like the same watch that Polar launched on the market almost 3 years ago, inside almost everything has changed. New GPS chip, bigger battery, new strap that improves a lot to the one of the M400 in touch and comfort and of course a really good optical pulse sensor.

I won't tell you that the M430 impresses. It doesn't because it's part of a model that we've known for 3 years, but the truth is that its behavior is impeccable. The optical pulse sensor is the one that has given me the best results among those equipped in a watch, if not the best. Polar is the only manufacturer that uses several sensors depending on the device they mount it on, and they continue to retouch and improve their sensor. They have always been known for their heart rate measurement, and the jump to optical measurement has been taken very seriously.

The small new features update it in line with what we are used to seeing in the market, including features that many users wanted to see in the M400 such as vibration alerts, longer battery life or more detailed sleep analysis. All this is included in the M430, and now we can only wait for the update to come in order to add the ability to record heart rates throughout the day, a feature that Polar has launched with its A370.

The truth is that you can't put too many obstacles in the way of the M430. What it does, it does well. Both its GPS and its optical sensor offer very good results. And it is very similar in performance to what other manufacturers like Garmin offer. My only complaint is the lack of aesthetic changes, and that is that despite bringing new things, it comes with an old-fashioned look.

It is this aspect that I think will play against you the most. Polar will need to do important promotional work to explain to the consumer why the price difference between the M400 and the M430, beyond the optical sensor. Not everyone is lucky enough to know this page as you are, being able to access the tests and know all the details of the different models in the market :-).

But if the question is whether the M430 is a good watch... yes, it is.

Buy Polar M430

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