exercise ball

American  

noun

1. a firm, very large, usually inflatable ball used in various exercises, chiefly to strengthen the back, pelvis, and abdominal muscles.

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Etymology

Origin of exercise ball

First recorded in 1905–10

Example Sentences

A glute strain began affecting his sciatic nerve and the pain left Bosa unable to do anything except lie on an exercise ball in the fetal position for hours.

From Los Angeles Times

It was surreal, she said a few days later while sitting on an exercise ball in her office.

From Los Angeles Times

This exercise ball fits securely into its carrier for transport and stationary exercise in an easy, fun way for you and your pet to interact.

From Seattle Times

Gottlieb coached until the final weeks before her due date, sometimes sitting on an exercise ball in the gym as the team went through drills.

From Los Angeles Times

In each episode, three contestants are asked to assemble a montage from scraps or household staples, items as unlikely as an air mattress, deflated exercise ball or old rug.

From Seattle Times