See the work behind the number.
Heart rate zones, effort, training load and a history that makes your progress visible.
Review tests and workouts with heart rate zone breakdowns, effort scoring and training history. Apple Health integration brings supported health and workout data into the picture.
Try it in VO2 Maximizer ↗Actual app imagery. Check the App Store for current availability.
Understand more.
Get more from every session.
1.5 Mile Run Training: 12-Week Plan to Cut Your Time
The 12-week 1.5 mile run training plan that cut my time by 47 seconds: mile-pace intervals, threshold tempos, base hours, and race-day pacing.
Read the guide ↗Balke Test Training: 12-Week Plan to Run Farther
The 12-week Balke test training plan that lifted my 15-min distance by 330m: threshold work, VO2 max intervals, base hours, and pacing strategy.
Read the guide ↗What Your VO2 Max Score Actually Means
Got a VO2 max number from a lab, field test, or watch? Here is what your score translates to on the FRIEND chart, and what to actually do with it.
Read the guide ↗