Gliding Lat Pull Workout on a Fitness Disc

"This exercise is going to target the latissimus dorsi muscle, or known as the lats, which comes from the side of the back up into the arm. So I need you to get on your mat into a side position, knees are bent. Place your hand right in the center of the glide, and place your hand in front for support and balance. We're going to start out with a small range of motion, pushing down through the glide on the way out and the way in, so the muscle's contracting eccentrically here and concentrically here, which just means the muscle is shortening on the way in. So as I get comfortable with the movement I'm going to extend the range of motion a little bit further. So again, the back muscles are working, not here but when I pull here against the floor. To make this a little harder I can place my hand on my leg and extend my leg out, and again I'm pushing and pulling at the same time. And to advance it even another level, I take my hand off my leg, leave my leg up, and one more level I can take my arm up over the head and pull in, and inhaling here, exhaling on the effort. Of course I would change sides after enough repetitions to fatigue the muscle group, and again, for the large muscle alongside of the back called the lats."