A woman performs crunches with a medicine ball at the gym

A woman performs crunches with a medicine ball at the gym. She lies on a bright green yoga mat, knees bent and feet raised with the medicine ball squeezed between them. She wears a black tank top and leggings and has her hair pulled back. As she crunches, she brings the ball and her knees to her chest, reaching her hands above her head when lying back. In the foreground, a person is doing a similar exercise on a mat, wearing black leggings and black and white sneakers. In the background, other people are exercising in the gym, which has mirrors, weights, and other fitness equipment. A water bottle sits on the mat beside the woman doing crunches.