This mainly depends on your fitness. How long does the massage last generally depends on the individual, and the massage belt mainly exercises the waist. Grasp the handrail with both hands, stand with your feet on the twisted waist plate, keep your upper body upright, keep your shoulders still, and use your waist strength to drive your hips and lower limbs to rotate left and right. The greater the rotation range, the better, but be careful not to sprain it. In addition, twisting the lumbar intervertebral disc can also stretch the shoulder joint and latissimus dorsi. Action: The preparation posture is the same as above, but you should grasp the handrail and twist the trunk and lower limbs left and right as a whole to make one side of the muscles and joints feel tight and then switch to the other side, and so on. The treadmill like the one below has a massage belt, which is not only similar to yours.