I use balls in my Core Training Studio almost all of the time! Clients love to stretch over them. I have a lot of clients use them to to learn proper squat positioning. I don’t have any machines in my studio, so we also use the balls as our “bench” to allow the core to stay integrated with all of the strengthening exercises. We use the ball for our chest presses, tricep french curls, chest flyes, and rotation. It is also perfect for abdominal work both laying on top and placing feet on top.