不宜立即停下休息 在剧烈活动时,由于肌肉活动的需要,心跳加快,流入四肢等肌肉的血液量增多;又由于活动时肌肉交替地收缩与放松,挤压了肌肉里的小静脉,使血液也能很快的返回心脏。此时马上停下休息,肌肉里的小静脉失去了对它的 Should not immediately stop and rest In strenuous activities, due to the needs of muscle activity, rapid heartbeat, increased blood flow into the limbs and other muscles; and because the activities of alternating muscle contraction and relaxation, squeezing the muscles in the small veins, the blood Can quickly return to the heart. Immediately stop and rest, the muscles in the small veins lost to it