What is the main purpose of conducting passive range of motion exercises?

The main purpose of conducting passive range of motion exercises is to maintain joint flexibility. These exercises involve moving a joint gently through its range of motion without active effort from the patient. They are typically performed by a caregiver or therapist and are particularly valuable for individuals who are unable to move their joints actively due to injury, illness, or other limitations.

Maintaining joint flexibility is crucial, as it helps prevent stiffness and contractures, which can occur when joints are not moved regularly. This type of exercise promotes circulation, helps maintain the integrity of joint structures, and can contribute to overall comfort for individuals who may be immobile.

While the other options address different aspects of physical therapy and rehabilitation, they do not align as closely with the primary objective of passive range of motion exercises. For instance, increasing muscle bulk or strengthening muscles relates more to active resistance exercises, and enhancing respiratory function is more tied to breathing exercises rather than passive mobility.