所谓“急刹车”,是指剧烈运动后立即停下来。在运动时肌肉是连续地一缩一松地活动,肌肉放松时血管充盈血液,肌肉收缩时可把血管中的血液挤回心脏。若剧烈运动后立即停下来,心脏仍然在快速地把血液从心脏泵到四周,而周围血液因重力作用淤积在下肢血管里,回流心脏不够,这样不仅不能加快恢复,还会阻碍下肢血液回流,影响血液循环,加深机体疲劳,严重时还可产生重力性休克,所以运动后立即静坐或静卧是不符合运动生理学要求的,因为下肢静脉血管由舒张到收缩需要一个调整过程。每次运动结束后应调整呼吸节奏,步行甩臂或慢跑,并做一些放 The so-called “brakes” refers to stop immediately after strenuous exercise. During exercise, the muscles are continuously contracted and loosened. When the muscles relax, the blood vessels fill the blood and the blood in the blood vessels can be squeezed back to the heart when the muscles contract. If strenuous exercise immediately stopped, the heart is still rapidly pumping blood from the heart to the surrounding, and the surrounding blood due to gravity deposition in the lower extremity blood vessels, back to the heart is not enough, so not only can not speed up the recovery, but also hinder the lower limbs blood reflux, Affect the blood circulation, deepen the body fatigue, severe cases can produce gravitational shock, so sit or sit still immediately after exercise is not consistent with the requirements of exercise physiology, because the venous blood from the diastolic to systolic need an adjustment process. After each exercise should adjust the breathing rhythm, walking jib or jogging, and do some put