New York Red Bulls soccer, fitness coach Pierre Barrieu teaches the Med Ball Catch & Crunch. ""I'm trying to mix receiving the ball with the strength of you deccelearting and centering on the abs, and with the cost of the swiss ball. You see on the swiss ball, somebody is facing you, he is going to toss the ball to you. As you receive it, you are going to crunch with it, and then toss it back to him. For these exercises usually I do thirty...