Improve your health: continuous sliding back and forth, this will allow your legs to move continuously, improve blood circulation, help you prevent leg cramps and back pain, while reducing blood vessel problems and leg inflammation. Knee sliding exercisers: ideal knee rehabilitation tools for knee replacement or surgery (ACL, PCL), hip replacement or fracture, shoulder replacement or surgery (shoulder sleeve, etc.) or after stroke. Simple to use: light weight, no assembly required. Just place the exercise machine on your feet, and then put your body above your knees. Then slide back and forth. Increase strength and range of motion: slide forward and backward smoothly and safely for abduction, adduction and flexion exercises, thereby increasing joint strength and mobility. Improve joint health: Low-impact exercise helps promote synovial fluid production, which reduces joint friction and increases blood flow after surgery or injury.