Which factor is identified as contributing to muscle tightness and stiffness?

• A. Prolonged postures (ischemia)
• B. Diet
• C. Stress
• D. Lack of movement

Answer: (A)

Prolonged postures cause ischemia in a muscle by reducing blood flow when you stay in the same position for too long. That limited circulation means less oxygen and fewer nutrients reach the muscle, while waste products accumulate. The muscle fibers can’t relax fully and stay more tense, which you feel as tightness and stiffness. The body also reacts to the ongoing slight contraction and reduced perfusion by sustaining muscle tone, which contributes to the stiff, tight feel.

Diet, while it can influence overall energy and recovery, doesn’t directly trigger the immediate tightness caused by restricted blood flow. Stress can heighten muscle tension through neural pathways, but the direct mechanism behind ischemia from a held position makes prolonged postures the best fit. Lack of movement is related, yet the specific cause-and-effect of reduced perfusion in a held posture is the clearer explanation for the stiffness observed.