Which of the following factors affect range of motion?

• A. Ligament laxity
• B. Age
• C. Culture
• D. All of the above

Answer: (D)

Range of motion is shaped by how the joint’s surrounding tissues are organized and how often the joint is used and stretched. Ligament laxity means the ligaments are looser, allowing the joint to move farther before the tissues tighten—so passive ROM can be greater, though too much laxity can lead to instability. Aging tends to reduce ROM because tissues become stiffer, collagen in ligaments and tendons loses elasticity, muscles may shorten, and cartilage or joint structures can wear, all limiting how far a joint can move. Cultural factors influence ROM through everyday activities, training, and stretching practices; communities that regularly engage in activities that promote flexibility or sports that require a wide range of motion often maintain higher ROM, while limited daily movement or fixed postures can restrict it. Taken together, all of these factors affect range of motion, so all of the above is the best answer.