View Full Version : Calibrating Polar VO2max estimate


zenpharaohs
August 26th, 2007, 11:37 PM
Sometimes people want to know how to get accurate Calorie counts for exercise. The most convenient way is to use a heart rate monitor which can count Calories. But in order for those counts to come out accurate, you have to make sure the monitor uses a good estimate of your VO2max. The most convenient estimate of VO2max is from Polar's "Ownindex" fitness test, where you lie down and the monitor checks your resting heart beats for a few minutes. But is that test any good? From time to time I use another method to check; typically I used to use a running test like the Cooper or Balke test. Those are kind of tough to do.

Today I checked my VO2max the Queens College Step Test (http://www.ispub.com/ostia/index.php?xmlFilePath=journals/ijba/vol1n1/vo2max.xml), and that came out 46.65.

Earlier today, I did the Polar fitness test, which came out as 46. Yet again the Polar Ownindex comes out as reliable for me.

Both of these are slightly low readings to what I would estimate my current VO2max as; I think it's effectively around 49, but I don't get more than a day or two from a heavy workout these days, so it tests slightly low. It's still within 5% of where I think it should be, which is plenty accurate enough for Calorie counts.

So yes, Virginia, you can get accurate exercise Calorie counts.

rapp
August 29th, 2007, 05:42 PM
They used a Tanita bioelectrical impedence method? If they were going through all this trouble, why not at least use calipers?

Other than that, really interesting. I should calculate my VO2Max sometime. I don't think my Polar F6 calculates my OwnIndex, but it does have a spot for me to enter my VO2Max.

zenpharaohs
August 29th, 2007, 11:39 PM
They used a Tanita bioelectrical impedence method? If they were going through all this trouble, why not at least use calipers?

Other than that, really interesting. I should calculate my VO2Max sometime. I don't think my Polar F6 calculates my OwnIndex, but it does have a spot for me to enter my VO2Max.

Calipers are inaccurate in untrained hands, so that might have been the reason.

You are right that the F6 does not have the fitness test, but if you put in a good VO2max, correct weight, and a reasonable maximum heart rate, then the F6 will count Calories about as well as any heart rate montior. I still have an F6 - the HRM that got me started keeping track of this stuff.