muscle strengthening and balance retraining prescribed by a trained health professional;

根据训练有素的医疗专业人员的要求，加强肌肉锻炼和平衡性训练；

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Ronaldo then moved to the sandpit to work on muscle strengthening exercises along with Paolo Maldini.

罗纳尔多随后跟马尔蒂尼一起到沙坑里做肌肉力量练习。

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Muscle Strengthening? Not only recruiting almost 100% muscle fibres but stimulating them to work at high frequency between 30 and 45 Hz.

强化肌肉-不单接近100%肌肉纤维同时运动，而且在每秒30至45次下高频活动。

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And try not to forget those muscle strengthening exercises.

VOA: special.2010.06.08

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

VOA: special.2011.06.28

The program involved improved awareness of injury risk as well as promoting proper motion patterns and muscle strengthening to minimize injury.

CNN: How do I protect my daughters' knees from sports injuries?

Daily stretching and muscle strengthening can be very useful in preventing cramps.

CNN: What causes leg cramps?

She needs to reduce her waist size a bit more, which she can do by doing more muscle-strengthening exercise to lower her percentage of body fat.

CNN: Secrets of women with healthy hearts