Reverse Crunch with Optional Twist
Begin by lying on the ground with your legs in the air. Think about pressing through your heels to bring your feet closer to the sky and your lower back and hips off the ground. That is a reverse crunch. To add in the twist, bring your hips off the ground then twist your torso in one direction, then bring your hips back to the ground, then raise them up and twist in the opposite direction.
Reverse Crunch with Optional Twists increase your core strength and can be done on the floor or on a bench.
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