Once you have done sit-ups for a while, you will find it much easier to do them. Don't give up or do more, but do it in another way Put your hands to your ears, slowly lift your body, then bend your body-starting from your waist, not from your back or shoulders-and try to reach your knees with your elbows in the opposite direction, and so on, and reach your left knees with your right elbows. Let go and return to your original position. Repeat, and hold on to 10- 15 times.