1. Get down on all fours, with your hands and knees on the ground. 2. Stretch one arm out straight while extending the opposite leg behind you. Hold for a few seconds, then come back to the starting ...
Your abdominal muscles act as postural muscles ... Step 2: Get into a tabletop position on all fours, wrists under shoulders, knees under hips, and back flat. With your body positioned on all fours ...