Elliptical machine can help the elderly to exercise their leg strength. When people get old, the heart function weakens and the blood circulation slows down, which leads to the weakness of leg strength. When using the elliptical machine to exercise, the legs will follow the trajectory of the elliptical machine. If you ride a bike, your thighs will get a good exercise, and the increase of leg strength will prevent the elderly from falling. I bought my mother a zero-gravity elliptical machine with smooth belt transmission and good exercise effect.