7. Crunch and twist 繼續做仰臥起坐并且扭動身體

Once you've been doing sit-ups for a while you'll notice that they've become a lot easier, don't give up and don't just do more, do them differently instead. Keep your hands by your ears and raise yourself up slowly then twist your body--from the waist, not your back or shoulders--and try to touch your knees with your opposite elbow, i.e. your right elbow comes up and across to touch your left knee. Untwist and go back to your starting position. Repeat on each side 10-15 times.

一旦做仰臥起坐堅持一段時間，你就會發現做起來簡單多了，不要放棄也不要做得更多，而是換種方式來做。保持你的雙手在耳側，慢慢把身體抬起來，然后，彎曲你的身體——從腰開始，而不是從你的背部或者肩膀-試著用相反方向的胳膊肘去夠你的膝蓋，如此這般，用你的右肘去夠你的左膝。松開還原到你原來的姿勢。重復做，一邊堅持10-15次。