You look at the lumbar extensor muscles.

看看腰部肌。

Also, other studies showed flexibility improvements in areas like the knees, hips, and back extensors.

此外，其他研究显示膝盖、臀部和背部肌等区域的柔韧性也得到了改善。

The common fibular nerve is in charge of the muscles in the anterior and lateral compartments of the leg, and intrinsic extensors of the foot.

腓总神经支配小腿前部和外侧部的肌肉，以及足部的有肌。

These muscles include the flexor digitorum profundus which flexes the fingers at the interphalangeal joints, and the extensor digitorum which hyperextend them at the metacarpal phalangeal joint.

前臂肌群包括指深屈肌（在指间关节处手指屈曲）及指肌（在掌指关节处手指过）。

They don't really have so many of the extensor muscles that are the weight-bearing muscles; instead, they rely on retractor muscles to pull themselves along.

他们实际上并没有那么多作为负重肌肉的肌；相反， 他们依靠牵开器肌肉来拉动自己。

If you can pre-turn the pelvis with a lot of lordosis in the spine, you get much more power development behind the center of mass through the extensor range.

如果你能在脊柱呈现明显前凸的情况下预先转动骨盆，便能在展范围内获得更多位于重心之后的动力发展。

One muscle of each pair is called the flexor. It bends a joint and brings a limb closer to the body. The other muscle, the extensor, does the opposite.

每一对肌肉中的一块肌被叫做屈肌。它可关节弯曲并这部分肢体更靠近躯体。另一块肌肉即肌，作用相反。

So footfall has to, occur behind the center of mass and then you get a very brief period of time to create an extensor pulse and then recover the leg.

因此，脚部着地必须发生在身体质心的后方， 随后你仅有极短的时间来产生一个肌脉冲， 并迅速恢复腿部状态。