Sit on a mat with your knees bent and feet on the floor, holding the sides of your medicine ball in your hands. Engage your core and lean back slightly. Twist your torso to the left and tap the floor ...

While the plank is an excellent core exercise, several other options can strengthen your core. You can do these bodyweight exercises anywhere, and they don’t require equipment.

The key is knowing how to do a plank, however. As good as the exercise is, you have to do it exactly right to reap the benefits. As one of the best core exercises to do at home, the plank can also ...