add cool down, stretching and warm up sequences
It would be great to have a variety of warm-up and cool down/stretching sequences to add before and after the workout. Some clients have no idea how to do either. It would be very helpful.
A separate section would definitely be helpful to separate it from the workouts, so that new clients don't get overwhelmed with seeing too many exercises in the 'workout' for the day, and can wrap their head around each individual piece
100% - I was about to suggest this myself.