4. Lie on the bed and lift your leg at the angle of 45 degree, then bent your knees slowly and then return to the original position. Repeat this move for 100 times. The other one is still a lying position. Then pretend you are riding a bike for 4 or 5 minutes. Take your time and if you can not do this you can help the exercises first.
平躺在床上，提起腿到45角位置，再慢慢地彎曲膝蓋，然后恢復(fù)到最初的平躺狀態(tài)，這樣是1輪，重復(fù)這個(gè)運(yùn)動(dòng)100次。另外一個(gè)運(yùn)動(dòng)也是平躺著，抬起腳做騎自行車(chē)動(dòng)作4到5分鐘。慢慢來(lái)，即使你不能堅(jiān)持做完它，起初也能達(dá)到適應(yīng)這樣運(yùn)動(dòng)的效果。