exercise ball
noun [ C ] uk/ˈek.sə.saɪz ˌbɔːl/ us/ˈek.sɚ.saɪz ˌbɑːl/ (also balance ball, fitness ball, stability ball, Swiss ball, yoga ball)
（锻炼时可以坐在或躺在上面的）健身球
a large ball for sitting or lying on while exercising
Working out on the exercise balls takes the stress off the back. 在健身球上锻炼可以减轻背部的压力。
The gym has equipment such as exercise balls, dumbbells, and kickboxing pads. 健身房里准备了健身球、哑铃和跆拳道垫等器材。
- More examples
- We sat on exercise balls and played catch with a medicine ball.
- To foster balance and mobility, she uses large exercise balls.
- I'd sit on a big rubber exercise ball with my baby and bounce her to sleep.