HR Zones

Estimated/calculated HR zones from Jim.

Bike

Aerobic: 120-139
Tempo: 140-155
Threshold: 156-169
VO2 Max: 169-180

Run

Aerobic: 125-152
Tempo: 153-160
Threshold: 161-169
VO2 Max: 170-176
Maximal Intensity: 177-185