单词exercise ball
n.: 健身球
网络: 运动球；运动治疗球；健身球教练
健身球:
a large ball that you can sit on when doing exercises to make your muscles work in a different way
Sitting on an exercise ball also involves more muscle activity and core strength than sitting on a typical desk chair.
同样，坐在健身球上也会比坐在普通的椅子上带动更多的肌肉活动和中枢肌肉群的运动。
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。
If you just can"t make another lap around the room, try sitting on an exercise ball and gently bouncing while holding your baby.
如果再走一圈太累的话，你可以抱着她坐在运动球上，轻轻地上下弹动。
Sit on an exercise ball and do one minute of ab curls.
坐健身球上，收腹1分钟。