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This fitness challenge is to strengthen your core with different variations of planks.
The picture below shows how to do a regular plank. Keep a straight line from the top of your head to your heels. Your shoulders should be in line with your elbows. Hold your abs in.
For side planks, you will literally just be on your side so you can have your hand on the ground or your forearm. Stack your feet and hold your arms in. You can place your knee down if needed.
Mountain climbers are more of a cardio move but they definitely work your core. Get into plank position but on your hands. Drive one of your knees up to your chest and then return back to starting position. Do the same thing on the other side. Once you get the movement down, speed up so that you are essentially "sprinting" in this position while driving your knees to your chest. Keep your upper body stable and strong.
If you are advanced and this is too easy for you, you can double or triple each day. If this is too difficult, cut the time and/or reps down and work your way up. This challenge is totally customizable based on your fitness level.
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