Select a workout type in the Activity entry and enable it;
There is one approach to starting a workout:
The watch currently supports 28 workout modes: Walking,
Running, Cycling, Skipping, Badminton, Basketball, Football,
Swimming, Climbing, Tennis, Rugby, Golf, Yoga, Workout,
Dancing, Baseball, Elliptical, Indoor Cycling, Free Training,
Rowing, Outdoor Running, Skiing, Bowling, Dumbbell, Sit-Ups, On
Foot, Indoor Walking, Indoor Running
Introduction to the Workout Function
Start Workouts