Muscleshortening is the product of repeated contraction of the cross bridges.
肌肉收缩是重复收缩，交叉桥的产物。
2
Stretching can cause systemic large local muscleshortening, the stasis of blood was "catch" back to the heart, and then greatly increase blood flow, improve blood circulation.
伸懒腰可惹起全身大局部肌肉的缩短，使瘀积的血液被“赶”回心脏，然后大大添加血流量，改善血液轮回。
3
Rest cramps in the calf at night are due to a shortening of the calf muscle which can happen while lying in bed and pointing your toes down.