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 towards ...

All the Latest Game Footage and Images from Sit-Ups Workout Are you ready for the 250 Sit-Ups Challenge? Body shaping is always good for our body. These workouts are perfect for men and women, ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images Bored of planks and crunches? Why not try mixing things up with a killer ab ...