National Certification Board for Therapeutic Massage & Bodywork (NCBTMB) Practice Exam

Muscle contractures occur when muscles shorten and become stiff, often due to imbalances in muscle use or inactivity over time. Aging is a significant factor in this process, as the body naturally experiences degenerative changes that can lead to decreased range of motion and flexibility. As individuals age, their muscles may lose elasticity and the connective tissues can tighten, making it more challenging for joints to move freely. This reduced range of motion can result in muscle contractures.

The other options do not contribute to the development of muscle contractures. Excessive hydration does not directly affect muscle length or flexibility in a way that would lead to contractures. Frequent stretching exercises generally promote flexibility and can help prevent contractures by maintaining the length of muscles. Improved circulation is also beneficial and aids in muscle health, allowing for better nutrient delivery and waste removal, which helps prevent stiffness and common issues related to immobility.