The user can be placed in an environment that supports 20%-100% of the body weight. Perform comfortable partial weight support exercises with an adjustable accuracy of 1%. Adapt to patients or athletes of all sizes, performing accurate, painless and injury-free training at all stages of training to increase muscle strength and cardiopulmonary endurance. Allows users to train with zero resistance under the premise of fall prevention support, allowing users to move without limit and pain, and restore health, mobility, and balance. Differential Air Pressure (DAP) technology originated from NASA can reduce walking load and reduce the influence of gravity and body weight during running or exercise. The air pressure inside the cabin is higher than the outside air pressure, which generates buoyancy for people, and the user has the experience of "space walking".