These measurements are estimates that can help you track and understand your training activities. The measurements require you to complete activities for two weeks using wrist-based heart rate or a compatible chest heart rate monitor. Cycling performance measurements require a heart rate monitor and a power meter. The measurements may seem inaccurate at first when the watch is still learning about your performance.

These estimates are provided and supported by Firstbeat Analytics™. For more information, go to garmin.com/performance-data/running.

Training status

Training status shows you how your training affects your fitness and performance. Your training status is based on changes to your VO2 max., acute load, and HRV status over an extended time period.

VO2 max.

VO2 max. is the maximum volume of oxygen (in milliliters) you can consume per minute per kilogram of body weight at your maximum performance (About VO2 Max. Estimates). Your watch displays heat and altitude corrected VO2 max. values when you are acclimating to high heat environments or high altitude (Heat and Altitude Performance Acclimation).

HRV

HRV is your heart rate variability status over the last seven days (Heart Rate Variability Status).

Acute load

Acute load is a weighted sum of your recent exercise load scores including exercise duration and intensity. (Acute Load).

Recovery time

The recovery time displays how much time remains before you are fully recovered and ready for the next hard workout (Recovery Time).