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。
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。
The buttock muscles extend the thigh bone of the back leg. The back foot is fixed on the mat.
盆腔肌肉使后退的大腿骨伸展，后脚固定于垫子上。
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