In the forearm plank posture, stretch your right arm above and straighten it until it is parallel to the floor.
The forearm plank is a variation on the push-up in which the body weight is supported by the forearms instead of the elbows.
Put your hands exactly under your shoulders, brace your abs, tuck your bottom in, and bring your feet together for a high plank.
With your right side facing up, lean over to the side so that your body forms a straight line from your head to your feet.
Do 15 sets of plank jacks as follows: a) Bring your feet together into a high plank posture.
Bring your arm down till it "threads" through below your hip, then bring it back up. Keep your thighs and hips apart.
Lay on your back with your knees bent at a 45-degree angle and your feet floating a few inches above the floor.
Go down on your hands and knees, tuck your bottom, and tighten your abs to form a tabletop posture.
Start in a high plank position with your core engaged and your feet hip-width apart to do the Commando plank.
From here, you may utilize your abdominal muscles to virtually straighten your upper body and pull your legs into your chest. Repeat.
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