Karvonen which seems to be the gold standard. It also tends to have the highest ranges. I've highlighted the Karvonen calculations and the Max heart rate zone.
|Calculated via http://www.racedaynutrition.com/HeartRate.aspx|
Also per http://www.racedaynutrition.com:
90%-100% = VO2 Max Zone
VO2 Max is your body’s maximum oxygen consumption level. It is measured in volume/time units. You may reach this zone only for very short bursts of time. When you go into oxygen debt by racing your buddy to the finish line you have reached your VO2 max. Your lungs can’t keep up your body’s demand for oxygen and lactic acid floods into your muscles. Training in this zone increases enzymes in your muscles responsible for anaerobic metabolism.
We've already established that I'm a bit shall we say, overclocked... but what actually does that mean?
This is the average of all of the stats from just about all of my workouts since I got my Garmin
|Via my Garmin Connect profile (this should be just about everything since October)|
185 is the AVERAGE heart rate which I have been operating at for all of my runs for about six months. I have gone as high as 207.
Just throwing that out there.