【Reverse V-shape starting】Mainly exercises the abdominal muscles. Starting position: Start in a push-up position, with your legs together and your shins on the fitness ball, keeping your back and legs straight. Action essentials: Contract your abdominal muscles, move your feet as far as possible toward your chest, keep your back and legs straight, and make your body form an inverted V. Pause for a few seconds at the highest point, contract, and then slowly return to the starting position.
