A man in a gray t-shirt and black shorts shows how to use a medicine ball to work out.
A man is against the wall squatting on a large ball.
Using a yoga ball, a man quietly shows watchers how to do sitting squats.
A man puts his hands together then sits and stands seven times using an exercise ball.
A man performing squats on an exercise ball going up and down for a tutorial
A man stands with an exercise ball behind him against a wall, clenches his hand in front, and sits to stand in the ball
a man is sitting up and down on a rubber ball as an exercise.
A man stands in a room, holds his hands together and then does sits and stands on an exercise ball.
A man has his hands grasp close to his chest and is doing squats until bouncing off an exercise ball and starting the process over.
a man doing a variation of squats with a medicine ball indoors