Viewing Your Fitness Age
Before the device can calculate an accurate fitness age, you must complete the user profile setup in the Garmin Connect app.
Your fitness age gives you an idea of how your fitness compares with a person of the same sex. Your device uses information, such as your age, body mass index (BMI), resting heart rate data, and vigorous activity history to provide a fitness age. If you have a Garmin Index scale, your device uses the body fat percentage metric instead of BMI to determine your fitness age. Exercise and lifestyle changes can impact your fitness age.
Select > My Stats > Fitness Age.