Spring tendons enhance the foot’s efficiency: some of the energy spent to drop one’s weight down when taking a step is actually stored and then returned to the leg as it rebounds.
In the spring and autumn period, jin prince chong 'er is a fugitive, hard life, with his jie zitui willing to cut a piece of meat from his own leg let him.
春秋时代，晋国公子重耳逃亡在外，生活艰苦，跟随他的介子推不惜从自己的腿上割下一块肉让他充饥。
3
Since joining the spring brother teach, leg also not acid, waist pain, also have a meal, also have appetite for energy, life fun!