A guy sitting in a chair helps a guy sitting on a ball to properly lift weights.
A man sitting in a chair is giving instructions to a man sitting on a ball on about how to do exercises.
A person performs an exercise while sitting on an exercise ball.
In a gym a man is showing another man how to use an exercise ball get leg exercises done
A man is explaining how to perform an exercise while sitting next to a man sitting on an exercise ball demonstrating the workout.
Two people are sitting in a fitness center and are demonstrating a technique in front of the camera
The instructor is doing a demonstration on the proper way to do the exercises.
Two men demonstrate a workout move while one sits on an exercise ball and the other is seated next to him.
A man is sitting on a exercise ball and is going to lift weights to the side.
A man sits on an exercise ball, while another man sits and instructs him on exercises.