Before revision: upExercising with a medicine ball Medicine ball plank thumb A medicine ball (also known as an exercise ball, a med ball, or a fitness ball) is a weighted ball roughly the diameter of the shoulders (approx.
After revision: upExercising with a medicine ball Medicine ball plank thumb A medicine ball (also known as an exercise ball, a med ball, or a fitness ball) is a weighted ball whose diameter is about a shoulder-width, (approx.