Range of Motion

The full movement potential of a joint, measured in degrees of a circle, from the starting position to maximum extension or flexion. Range of motion exercises are fundamental to physical rehabilitation, helping maintain joint flexibility and prevent contractures. In accessibility contexts, limited range of motion affects a user's ability to reach input devices, perform gestures, or maintain positions required for technology interaction. Understanding ROM helps designers create interfaces that minimize reaching requirements, support adjustable device positioning, and accommodate reduced movement capacity in interaction design.