一、不能立即休息。剧烈运动时人的心跳加快,肌肉、毛细血管扩张,血液流动加快,同时肌肉有节律性地收缩会挤压小静脉,促使血液很快地流回心脏。此时如立即停下来休息,肌肉的节律性收缩也会停止,原来流进肌肉的大量血液就不能通过肌肉收缩流回心脏,造成血压降低,出现脑部暂时性缺血,引发心慌气短、 First, you can not rest immediately. Strenuous exercise, rapid heartbeat, muscle, telangiectasia, blood flow to accelerate, while the contraction of the muscle rhythms will squeeze the small veins, prompting the blood flow back to the heart quickly. At this point, for example, immediately stop to rest, muscle rhythmic contraction will stop, the original large amount of blood flowing into the muscle can not flow back through the muscle contraction of the heart, causing blood pressure, resulting in transient brain ischemia, causing palpitation shortness of breath,