有一回,和朋友去锻炼,朋友问我,你能用脚后跟踢臀部吗?这个问题,令我哑然失笑。不少人在小时候,都曾玩过类似的游戏。我也一样。所以,我信心满满。可结果却出人意料,费了好一会儿工夫,也没能如愿踢到。见状,朋友笑着说,不只是你,很多人都是这样。原来,人年纪小的时候,筋骨柔软,所以脚后跟能轻易踢到臀部。后来,年岁渐长,筋骨硬化,再缺乏锻炼,所以就很难够得着臀部了。有不少办公族或老年人,因缺乏运动而导致腰大肌退化,如此一来, Once, with my friends to exercise, a friend asked me, you can use the heel to kick the buttocks it? This question, I am dumbfounding. Many people used to play similar games when they were young. me too. So, I am full of confidence. But the result was unexpected, took a while for a while, but also failed to kick it. Seeing, a friend said with a smile, not just you, a lot of people are like this. It turned out that when people are young, bones soft, so the heel can easily kick the buttocks. Later, the older, bony sclerosis, lack of exercise, it is difficult to get the buttocks. There are many office workers or the elderly, due to lack of exercise and lead to psoas degeneration, thus,