Sit Ups & Crunches both are the common exercises for abdomen. Sit Up is muscle training work out involving abdomen, hip muscles in adding to neck, chest, lower leg and lower back. The difference between Crunches and Sit Ups is that the Sit Ups exercises target different group of muscles. Crunches may be called as half Sit ups which targets only abdominal muscles. In the war of Crunches vs Sit Ups , the Sit Ups draw more groups of muscles. Crunches only attack the abdominal muscles. Difference between Crunches and Sit Ups In the battle of Crunches vs Sit Ups, it can be concluded that Sit Ups is more vigorous than Crunches in burning out calories due to strength in multiple muscle groups. Any exercise whether Sit Ups or Crunches is designed to build muscles, it will automatically flatten the abdomen. But, there are some drawbacks of Sit Ups as there remain some chances of injury. It may also be the cause of severe pain in neck and lower back. If your sh