Quote Originally Posted by SadieKate View Post
An article by velogirl on estimating heart rate zones.

http://www.velogirls.com/resources/p...ions/heart.htm
CrazyC

The heart rate calculation of 220 - age is complete and total nonsense. It is not based on any science and should be ignored. (It is loosely based on the fact that newborns have a normal heart rate up to 220 - which is true. To which there is nothing to say but "so what". This has abolutely nothing to do with the maximal exercise heart rates of adults.)

You can find lots of discussion here about testing for your own max heart rate with maximal effort.