Sit-ups may seem like a basic and simple exercise. After all, to do this classic exercise, you just have to lie on your back with your knees bent and feet flat on the floor, raise your torso ...

Set Core Plan that builds strength & definition faster than 100 sit-ups a day. Efficient, science-backed core training awaits ...

FBI Everyone gets a minute to complete as many sit-ups as possible — a momentary pause means the test is over. At least one point must be earned in the sit-up portion of the fitness test.

Explore the differences between decline crunches and sit-ups. Find out what muscles each targets, and learn proper form to enhance your core training.