And in addition, the CDC says we should work out all major muscle groups twice a week.

此外，疾控中心称，我们应该每周锻炼两次所有主要肌肉群。

The government also recommends strength training at least twice a week and working all major muscle groups when we do.

政府还建议每周进行两次计量锻炼，锻炼主要的肌肉。

Swimming exercises all the major muscle groups.

【exercise】游泳能使身体所有的主要肌群得到锻炼。

For deep muscle relaxation, you will tense then relax the major muscle groups of your body, beginning with your feet and working your way towards your head and face.

对于深层肌肉放松，你会绷紧然后放松身体的主要肌肉群，从你的脚开始，一直到你的头和脸。

This equipment allows us to stimulate all the major muscle groups using a number of different exercises.(37) The 'multi-gym' is particularly good for the 'prime mover muscles' such as biceps, triceps and pectorals.

该设备使我们能够通过多种不同的练习来刺激所有主要肌肉群。 (37) “多功能健身房”特别适合二头肌、三头肌和胸肌等“原动力肌肉” 。