To assign a Workout Program to a member, you will first need to create a workout program. Then you can assign it to a member.
You can assign the members to a program from the Workout Program tab under Training or from the member profile.
From the Training Section:
STEP 1: Go to Training > Workout Program
STEP 2: Click on Assign to Member button
STEP 3: Select the Member(s) and save
From the Member Profile:
STEP 1: Go to Members > Click the Member
STEP 2: Click on the Training tab
STEP 3: Click + Workout Program
STEP 4: Add the Program and Click Save