It helps balance your muscle groups.

它能帮助平衡肌群。

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Muscle-strengthening activities, involving major muscle groups, should be done on 2 or more days a week.

每周至少应有2天进行大肌群参与的增强肌肉力量的活动。

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Changing your routine will help build different muscle groups and will be beneficial to your overall fitness.

改变你的训练计划可以帮助你训练不同的肌肉群，这样有助于提高你全身的水平。

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Muscle-strengthening activities help build and strengthen muscle groups in the body.

VOA: special.2011.06.28

Nearly all of the major muscle groups are put to work.

VOA: special.2010.06.08

Aerobic activity is a repetitive rhythmic exercise involving large muscle groups such as legs, shoulders and arms.

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The Occupational Safety and Health Administration recommends mixing noncomputer-related tasks into the workday, so that you're moving and using different muscle groups.

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One routine targets all muscle groups by lifting heavy weights through movements like squats, bench presses, bicep curls, tricep extensions, calf lifts and lateral pull-downs.

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