Adjust the ST to mid-calf and lie on the floor while facing the anchor point. Set the right forearm into both foot cradles. Use the left arm to help set up the plank and stabilize the position. Corkscrew the shoulders to pack and spread the legs a little wider than shoulder-width apart. Press down into the foot cradles; don’t allow the torso to rotate. Extend the left arm to shoulder height. Hold this plank while lifting and tapping the left arm to the floor. Repeat on the other side.