I’ve just finished presented a review paper on postural control at NTU – part of the presentation is about doing crunches effectively. Do allow me to share you with here.
It is more effective doing crunches on a fitball than on a flat surface.
While we can do regular crunches on flat surface, Garcia 2000 found that doing crunches on labile surfaces such as the fitball modifies the way that the muscles work together to stabilize the whole body and spine, it also involves improving muscle activity amplitude. The study found that performing such exercises on labile surfaces has a higher demand on the motor system. They also approximately doubled the abdominal muscle activity! Activity in the external oblique muscle increased approximately fourfold if one performs crunches over the gym ball with the feet on the floor. It also generally doubled activity in the rectus abdominis muscle. [Read more…]