- A lightweight, inflated plastic ball with a diameter of 18-36 inches (45-91 cm), used in various fitness and physiotherapeutic exercises. Also called stability ball.More example sentences
- Lie on your back and rest your legs on top of an exercise ball, tucking the ball behind your knees.
- At MUSCLE & FITNESS, we often recommend using an exercise ball for moves like crunches and back extensions.
- After little to no rest, grab a pair of lighter weights and do 10-15 flyes on an exercise ball.