How is my VO2max calculated?

VO₂max is calculated when you do a running activity like running, trail running, or treadmill, and have a relatively steady heart rate measurement for more than 15 minutes. VO₂ max is the maximum amount of oxygen your body can utilize during exercise, per kilogram of body weight, per minute. It is the standard method used to determine physical fitness and is an indication of your overall aerobic fitness level. A high VO₂max means you are able to exercise for prolonged periods at a higher power. Studies have shown that individuals with a high VO₂max tend to live longer and have a lower risk of cardiovascular diseases.

Note: If you never use your watch for running, but use it for 24/7 activity tracking and other types of activities such as cycling, gym, or other indoor activities, VO₂max is estimated based on your general activity level and will be less accurate.

During the first couple of days of use or if you never wear your watch for running or 24/7 tracking, VO₂max is estimated based on your profile and self-reported activity level, and will be less accurate. As your watch learns about your behaviour and heart rate versus speed analysis over time, VO₂max will become more accurate.