After you activate Workouts from the App store, it will display right under Appointments. Workouts will show two sub-sections: Workout List (Templates) and Programming (Scheduling of those templates). After creating a template from Workout List, you can schedule one using Programming.
When creating a template, you'll see options name the workout type, describe it, and add components -- the actual things the customer will need to do in the workout. Components have assignable measurement types to fit the most common workouts, like Time, Reps, or "None" if neither applies.
Examples could be:
Run 5k - (you'd select None for this, and the customer would only see "Run 5k")
Plank - 2 minutes
Deadlift 50kg - 10 reps
To create a new workout template, click Workout List > New Workout
To schedule a workout > click Workouts > Programming > Schedule Workout.
Select the workout, its track (not required), the start date and (if there will be more than one workout) toggle on 'Schedule Recurring'.
Then choose:
how many days between each workout,
when to end the series (how many to schedule or on a specific date)
Preview the workout at the bottom of the pop up before clicking Schedule.
You'll now see the workouts listed on your Workout Schedule.
Customers will be able to see this Workout on the day you scheduled it -- It won't become visible until that day. And, if you're using Tracks, which only show workouts to certain customers (via tags), this workout will only show to customers on that specific track.