Medicine ball

Piece of exercise equipment

Medicine ball

A medicine ball (also known as an exercise ball, a med ball, or a fitness ball) is a weighted ball with a diameter of about a shoulder-width. The size of a medicine ball is approximately 350 mm (13.7 in), often used for rehabilitation and strength training. The medicine ball also serves an important role in the field of sports medicine to improve strength and neuromuscular coordination.

From Wikipedia, under CC BY-SA. More on occurri.