1. SPIDERMAN PLANK CRUNCH
Start in a traditional plank position with your forearms on the ground and your body perfectly straight. Bring your right knee forward towards your right elbow, then return to the plank position. Repeat by bringing your left knee toward your left elbow. That’s one rep. Alternate sides for a total of 10 complete reps.
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Holland says: “The plank is pretty much one of the only exercises where you’re getting your entire core. You’re working the front and back of your abdominal area at the same time without any equipment. You’re getting your rectus abdominis, your obliques, and your lower back. It’s so simple and effective that you can do it anywhere.”