Promoted exercises: Motor function: This protocol is designed to exercise flexion & extension of the elbow and flexion & adduction of the shoulder with lateral movements of the arms (with arms resting on a table). It trains distance estimation, timing, and precision of movement. 

Description of the activity: In this exercise, a series of colored spheres approach from the horizon towards the user, who must intercept them with both hands to get points. Left and right spheres must be touched with left and right arms respectively. The RGS system adapts the size, speed, and dispersion of the spheres according to the user’s performance for each arm separately.