"This is a great, beginner-friendly ab exercise and also it hits all of the ab muscles," Jaleel Roberts, ACSM-certified lead trainer at Planet Fitness in Charlotte, North Carolina, said. "Most of the members who perform this exercise love it due to the fact that it is easy to learn."
- Lie flat on the floor with your lower back pressed to the ground.
- With your hands behind your head, bring your knees toward your chest and lift your upper back until your shoulder blades are off the mat. Be sure not to pull on your neck.
- Straighten your right leg out to about a 45-degree angle to the ground while turning your upper body to the left, bringing your right elbow toward the left knee. Make sure your rib cage is moving and not just your elbows.
- Switch sides, and do the same motion on the other side to complete one rep.
- Do three sets of 20 reps.
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