在中长跑比赛中，经常看到某些运动员前半程遥遥领先，大有稳操胜券、一举夺魁之势。但这类运动员往往后半程体力不支，每况愈下，有的人甚至不能坚持到底，只好中途退出比赛。对于这类运动员人们往往以一言以蔽之──后劲不足！中长跑运动员怎样才能保持后劲进行最后冲刺呢？? In the middle and long distance race, we often see that some athletes are far ahead of the first half, they have a great deal of success and win the championship. However, such athletes tend to be physically weak after the second half, deteriorating, and some people even can not hold to the end, had to quit the game halfway. For such athletes, people often take the slightest silence ─ ─ lack of stamina! Long-distance runners how to keep the momentum for the final sprint it? ?