What is the main purpose of performing range of motion (ROM) and passive range of motion (PROM) exercises?

• A. Increase muscle strength
• B. Improve cardiovascular fitness
• C. Prevention of contracture development
• D. Enhance bone density

Answer: (C)

The core idea of ROM and PROM is to keep joints moving and tissues lengthened to prevent contractures that can develop when movement is limited. When joints and the surrounding soft tissues aren’t moved regularly, muscles, ligaments, and connective tissues shorten and stiffen, leading to a loss of motion and potential deformities called contractures. ROM involves moving the joint through its available range, and PROM is movement performed by someone else when the patient can’t move it themselves. Regularly moving the joints helps maintain flexibility, prevents stiffness, and supports healthy circulation around the joint.

These exercises aren’t aimed at building muscle strength, improving cardiovascular fitness, or increasing bone density. Strength gains come from active, resisted exercises; cardiovascular gains require aerobic activity; and bone density increases with weight-bearing or resistance training. So ROM and PROM are best understood as methods to preserve joint mobility and prevent contracture development during periods of limited movement.