Nokia N97 and Polar Heart Rate Monitor: 10km cycling test

September 6, 2009

The Nokia N97 mobile phone together with Sports Tracker and the Polar heart rate monitor belt was ready for the first 10km cycling test on the 30th of August. This post will show a full 10km heart rate curve among other things as a prove of concept with the N97 + Sports Tracker + Polar heart rate belt. The route was raced with the N97 mounted on the stem so I could look at it all the time (see earlier post for details and pictures). The following two figures will be used to explain how the screen looked while racing. The first figure to the left shows the initial screen after Sport Tracker i started. I have saved a route under “Routes” and this is the one I selected for the test. There are some benefits when using pre-saved routes. One is to compare the race against other races on the same route later on. Another is seen on the second figure. When you start the workout the route is shown with a red line in the map part of the active screen. Then, while you are cycling, the route path is overlaid with a blue line to show you how far you are on the route (the map moves so yout current position is visible all the time). Unfortunately I did not make a screen dump of that while cycling, but I illustrated it on the second figure by adding the blue line my self. But in reality it look the same. The screen was also set to show speed and not pace, which is how I normally has it set up. You can switch at any time during a race. Distance, heart rate and time is always shown. BTW, the race was done some days ago, but I did not have time for the post until today.

Initial Screen Scr000059-status

If you have automatic lap-time activated you will get a lap status for some seconds each time the distance has parsed. This is very nice. I will add some pictures later of this feature. After racing all 10 km I just select the option menu and press stop. It all works very well since the N97 is now mounted on the stem and the N97 has the touch screen. You will see a status screen when you press stop but I have not included it here. Instead the remaining figures are the ones you will see when you go into the training diary menu (see first figure in the post). In the training diary list of workouts, the workout for this 10 km route is selected and a summary is shown. This is seen on the first figure to the left below.

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Compared to summary screens before the Polar heart rate belt was added to the setup, it now shows average heart rate for this race and also the heart rate distribution. The distribution shows how much time in percentage, you spend in the different hart rate zones. The heart rate zones are setup via the heart rate menu. This is seen in the 2nd figure to the right just above this paragraph. For this workout the heart rate zones was set as proposed by the application itself, when I typed in my personal data like age, weight and so on. In another post I will show how they can be found and personalized by doing a conconi test in a gym using N97 and the Polar heart rate belt. The 3rd figure above is the second result screen you can see in the training diary for the race. It shows all the lap times. It was windy that day so the results is not the best I have done on that route – and it also shows on the speed curves and to some extend on the heart rate curve that the race was not very good. The speed and altitude curves are shown here:

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The altitude curve shows that the very few meters in changes can not be the reason for the variations in the speed. So the course for the “large” variations on that day was mainly the wind, but then again it all boils down to a fitness shape that I need to improve both in terms of stamina and endurance – but I guess I also need to do some weight lifting to improve the muscle strength in the legs. The variations in speed are large and the average is around the 30 km per hour. Luckily I now have the heart rate curves, so lets take a look on that . The heart rate is the key for finding the right speed for proper endurance training or pushing your anaerobic threshold and so on. I will also get back to all this when doing the conconi test stuff.

Scr000053 Scr000054

The heat rate curve also shows large variations. This is not the correct way of training but the race was done only to see if the Polar belt would log the heart rate without any problems, and the curve certainly proves that the connection and measurement is working. At the beginning the heart rate gets a little too high compared to my theoretical maximum heart rate for a person at my age (220 bpm minus your age). I will not go into detailed analysis of the heart rate curve yet. It is easier to do that when the data are cross correlated on the same chart. I will do that on a longer workout based on a route with more hills. The cross correlation can be done in Open Office calc of Microsoft Excel if data are exported in csv format. The second figure of the heart rate data shows the distribution. The time spend in each zone is shown,and here it is not percentage but absolute time. Then, also on that figure, a histogram of the heart rate time in each zone is shown, but divided into bins. This is another useful analysis tool for the exercise.
So the final conclusion is that the heart rate monitor know works without the drop outs I saw before mounting the N97 on the stem – so now I am ready to use it and post hints of how to to interpret and use the different curves and export functions, for improving your training sessions.

27 Responses to “Nokia N97 and Polar Heart Rate Monitor: 10km cycling test”

  1. [...] See original here:  Nokia N97 and Polar Heart Rate Monitor: 10km cycling test [...]

  2. Hej
    Tror du den vil fungere med en Nokia 5800, det ser jo totalt fedt ud.

  3. Hej Anders,
    jeg vender tilbage med info. Jeg tror jeg kan få det testet på en 5800 i denne uge, og så får du besked. Men mon ikke? 5800 er også en S60 5th edition med samme OS version som N97.

  4. Hello,
    Not sure that this is true:), but thanks for a post.

  5. Hej Anders, jeg har nu lavet en minimal test med Nokia 5800. Jeg har Sports Tracker v.2.06 kørende på den med Polar bluetooth heart rate bæltet. Jeg kunne starte en workout og aflæse puls som jeg plejer. Så det virker. jeg har dog ikke prøvet at kører en længere tur, så på et tidspunkt skal det nok have en større test.

  6. [...] Martin’s Blog » Nokia N97 and Polar Heart Rate Monitor: 10km … [...]

  7. Your blog is full of interesting articles, thanks for good read

  8. i bought two units of Nokia N97 because i like the style of this phone and also its features. Best phone i have ever used.

  9. I love the look and feel of the Nokia N97. This is probably the best phone that i ever bought, the other best phone would be the iPhone.

  10. [...] Martin’s Blog » Nokia N97 and Polar Heart Rate Monitor: 10km … [...]

  11. Nokia N97 would always be listed as one of the best phones ever manufactured’`’

  12. even though the Nokia N97 is an out dated model, it is still one of the best phones in the market :

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