4/28/2023 0 Comments Polar calorie trackerAn increase in exercise intensity results in increased RQ and caloric equivalent due to the increased oxidation of carbohydrate and decreased oxidation of fat. In the described calculation model, energy expenditure is calculated on the basis of information on VO2 (or METs), respiratory quotient (RQ) and caloric equivalent.īoth exercise intensity and duration affect RQ and caloric equivalent, which is a well-known phenomenon established in literature. That is why energy expenditure calculations in higher end devices include VO2max At the same % of max HR, this person will reach an higher speed, that means that he is spending more energy. I think it make sense: for example if you have two people with same age weight and max HR that run at the same HR, the person with higher vo2max will be able to accomplish more work (run faster for example) and so his energy expenditure would be higher.Īnother example is if a person improve his cardiovascular fitness over time. I'm sorry, but all the literature I read points to the fact that the VO2max does affect calories expenditure and all the equations I saw do calculate different energy expenditure of the VO2max is different, including the white paper from firstbeat that is the basis for Garmin calories estimation: Garmin does not include them in the calories it gives for actual runs. You could well have a point about "BMR" calories. No - VO2 Max is a measurement of fitness level not calorie burn. > Does less VO2max mean less calories burnt? With the Garmin Zones, having them calculated as %HRR, Walking doesn't put me in a zone and a slow run will much more likely put me in Z1 :) With Polar Zones a recovery run in Zone 1 is impossible for me, I have to walk to be in that zone. When doing a normal easy run and by feel in Zone 3, Polar would always put me in Zone 4 maybe even on the upper end. What I really don't like about Polar is that you cannot adjust the HR Zones. ![]() ![]() I guess that would explain why the difference for this specific activity was so big. I found out, that the FR had somewhat of a big drop in HR over some time. I also have looked into the details of the walk I mentioned and compared the HR from the Fr and Polar H7. I also checked out the firstbeat website, they seem to have an extensive background in this area. So I would guess that it makes sense to trust the firstbeat numbers more. Maybe when using a Polar watch you might have the VO2max and HRrest in personal settings. However you're right, that there is no personal setting for resting HR and neither for Vo2max in the app. So it might not be bad but apparently not as good as firstbeats algorythms. Polar says in research for its fitness test, deviation from mean was 12%. Polars test however is taken during rest in a laying position. From the FR235 I got a VO2max just above 40, which is also what I got from the Polar Fitness test. Polar has a "fitness test" which gives a so called OwnIndex, which should be something like VO2max. If anything I would probably trust the 235 more, because of the more advanced algorithm and because Garmin stands by their VO2max estimate saying that is 95% as accurate as a lab test. There's no reason to think that the 235 estimations are any less accurate (provided that the heart rate readings are similar). The bottom line is that they are only estimates, so there's no way to know which one is closer to reality, but the Polar beat app seems to use a simplified method vs other higher end HRM watches, like the 235. Also they don't use resting heart rate (other dedicated higher end Polar units use both VO2max and resting heart rate). There is no setting for VO2max, but there is a "training background" setting that is used in the energy expenditure calculation, that doesn't seem very scientific to me. ![]() Supposedly the 235 calories accuracy will also further improve over time once the VO2max estimate stabilizes (also Garmin clearly states that VO2max estimates obtained while using a chest strap are more accurate than VO2max estimates obtained with the optical heart sensor)ĮDIT: I looked ad the polar beat app. Zones are tools for you to help you in your training, and don't influence calories calculation.Įvery vendor uses a different algorithm (Garmin uses Firstbeat) and the usual parameters used in high end devices are: age, HRmax, HR at rest, weight, height, VO2max and Firstbeat also uses heart rate variability, but if I understand that correctly, heart rate variability for the 235 is only available when you pair a chest strap.ĭid you already get a VO2max estimate from the 235? Is there a VO2max setting in the polar beat app and is it close to the 235 estimate?Īlso, check that all the other parameters are the same.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |