What does exercise ball mean?
exercise ball
Plural: exercise balls
Definition
A large inflatable ball that you sit on, lean on or roll over to exercise and stretch.
Example sentences
Since I traded my chair for an exercise ball, my back doesn't hurt by the end of the day anymore.
Since I traded my chair for an exercise ball, my back doesn't hurt by the end of the day anymore.
After hauling hoses all morning, I stretched over the exercise ball until my shoulders stopped aching.