Stress: Exhaustion means that the body is under control. Since the goal is exhaustion under isolation, it is better to control it, so it is not the requirement and principle of exhaustion to be easily injured.
Extended data:
Abdominal muscle wheel, the middle wheel can rotate freely, and the two handles beside it are an exercise device. It looks like a pharmaceutical factory. When exercising, kneel down, hold the handle with both hands, and put the abdominal muscles in front of your body.