Sit on an exercise ball and do one minute of ab curls.

坐健身球上，收腹1分钟。

youdao

Bouncing on an exercise ball or birthing ball while you hold her.

抱着宝宝在健身球或分娩球上轻轻弹跳。

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Some experts on sitting recommend "active sitting" using an exercise ball, kneeling stool or something else without a high back.

专家建议“积极坐姿”。不管健身球还是凳子，只要没有高靠背就好。

youdao

I just want to exercise or something I'll go and play soccer, basketball, dodge ball, things like that.

我想锻炼的时候我就去踢足球、打篮球、打躲避球，这一类的。

我喜欢运动 - SpeakingMax英语口语达人

The meteor was one yard in diameter, about the size of an exercise ball, when it entered the atmosphere over eastern Pennsylvania, said Cooke.

CNN: Meteor lights up East Coast -- and social media

Warm up inside, and incorporate stretches (especially for the hamstrings) as well as core-strengthening exercises such as mini sit-ups, crunches, or working an exercise ball.

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His arms and legs in chains, he was allowed to kick a soccer ball around a small exercise area.

CNN: ASIANOW - TIME Asia | The Long Way Home