Onboarding · step test
Four numbers, one minute
We estimate VO₂max from your resting heart rate and how fast you recover after 60 seconds of stepping. It is an estimate, not a lab test — good enough to prescribe zones, honest about its error bars.
Your inputs
The step test
Step up and down a stair for 60 seconds at roughly 96 steps per minute. Stop, wait one minute, then read your heart rate from your watch and enter it above. Faster recovery means a higher estimate.
Your estimate
50.6ml/kg/min
Fitness age
24 yr
Percentile
84th
Predicted HRmax
181 bpm
Zone 2 band
132–144 bpm
Zone 4 band
156–169 bpm
Weight
76 kg
Estimates use Tanaka predicted maximum and heart-rate-ratio VO₂max estimation, adjusted for one-minute recovery. Expect ±10–15%. Not a medical device.