Stretching can cause systemic large local muscle shortening, 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。
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The MRIs showed increased blood oxygenation and flow in the brain stem and cerebellum of the stroke survivors who had used the treadmill but not in those who did stretching.
'You can burn up to 130 calories an hour on a shopping trip, ' says Healy. 'All that contorting and pulling items on and off is good for stretching muscles and increasing blood flow, too.