The Plank is an excellent core exercise and test of core strength, this version of that exercise is more advanced.
Start this exercise by lying face down on a mat. Arms outstretched but slightly bent, legs straight and up on your toes.
Using your toes and abdominals, lift your body off the mat a few inches with only your toes and forearms touching the mat.
Hold for 2 seconds and release back down to start position for one rep.
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