Engage your quadriceps (front muscle on thigh) and extend your torso until you can melt over your legs.

使用你的四头肌(前面的大腿肌肉)并延长你的躯干直到你能够将你的腿弄软。

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The pelvis is kept balanced because the psoas flexes the thigh, and the glutei make the thigh lengthen, or extend.

骨盆保持着平衡，因为腰肌使大腿前侧屈曲，臀肌使大腿前侧伸长或者伸展。

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Increases the right leg thigh strength specialized training, strengthens right leg's pedal to extend the strength, the pedal to extend the scope and the speed, obtains the big pedal reacting force.

增加右腿腿部力量专门训练，加强右腿的蹬伸力量、蹬伸幅度及速度，获得较大的蹬地反作用力。

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