A man is displaying a method for doing a sitting exercise.
A man is showing how to exercise your abdominal muscles with an exercise ball.
A man is sitting on top of a pink rubber ball on the inside of a gym.
Man is sitting on a big red exercise ball, explaining how to get the most out of workout.
A man sitting and balancing himself on a large exercise ball in a gym.
A man is in the gym explaining how to exercise while sitting on a large ball with your feet off the floor.
A man is in a gym balancing on a large workout ball to exercise his muscles.
A man demonstrates exercise techniques using a large ball he is sitting on.
A man in a workout room sits on an exercise ball and explains steps for a workout.
A man is sitting on an exersize ball and describing various muscles.