sentence: A young man does warm up exercises before playing a solo game of tennis in a gym room using the wall as an opponent before finally collapsing on the gym floor in exhaustion and then rising again. sentence:   A young man sits on a hardwood floor of a gym room and does warm up exercises including toe touches. sentence:   The man then gets up and does standing warm up exercises including stretching and bending at the knees. sentence:   the man then begins to play solo tennis using the wall as an opponent and hitting the ball with the racket against the wall back and forth. sentence:   The man then collapses on the floor in exhaustion as the ball bounces around on the floor before he gets up again.