In this video tutorial, viewers learn how to do a reverse plank. This exercise will strengthen the core muscles. Begin by sitting with your legs in front of you. Your hands should be behind you and your fingertips should be facing forward. Now lift your hips off the ground as high as you can. Squeeze the stomach into your spine and hold it. Users may also use their forearms instead of their hands. This exercise should be held for 15-30 seconds. This video will benefit those viewers who are interested in health and fitness, and would like to learn an exercise that will strengthen their core.