A side oblique crunch can be done lying down. This exercise works the ab and oblique muscles. A toe tap crunch adds an extra level to the traditional crunch by targeting the upper and lower abs.

Discover 3 core stability exercises to build a stronger midsection, ditch endless crunches, and boost fitness effectively.

This core workout is pregnancy safe, and targets the deep core muscles essential for pregnancy, childbirth and postpartum.

As your core is working against gravity to keep your body stable as you move, you’ll be working just as hard, if not harder, than you would lying on your back doing sit-ups and crunches.