Scientific Recovery Design: Improves rotational mobility, supports structured rehabilitation training for elderly arm and shoulder exercise, and aids gripping function recovery through targeted muscle participation. Targeted Muscle Participation: Achieve musclespecific results using the rotary resistant controller for effective targeted arm workouts. Coordination Stability Boost: Designed for both single and double arm workouts, it improves multiangle training while emphasizing cycling motions and strengthening shoulderelbow joint coordination effectively. Improved Stability Design: Provides workout displacement elimination with antislip adhesion for a secure and uninterrupted arm training process. Use scenarios At home rehabilitation for elderly users to enhance rotational mobility and restore grip function through targeted muscle participation. In a clinic or physical therapy setting for singlearm or doublearm routines that emphasize multiangle training and shoulderelbow coordination. For arm workouts with adjustable resistance to tailor intensity and target specific muscle groups during rehabilitation or fitness programs.