No matter which variations you follow, crunches have the advantage over sit-ups of being able to better target abdominal muscles. "Because the movement is smaller, you can control momentum more," ...

Crunches are great for strengthening and toning your core muscles, specifically the rectus abdominis (AKA your six-pack) and ...

The reverse crunch is a simple core exercise that targets those hard-to-hit lower abs — without straining your neck and back.

It’s important to know how to perform a crunch without any neck pain first. After you build your core strength, you can move on to a modified situp and then a situp, which is a more advanced ...

Modified crunches can work additional muscle groups. "Laying on your side as you do crunches will also target your oblique muscles," says Hess. Lifting your head and shoulders to one side or the ...