Which is a long-term skeletal adaptation to regular exercise?

Which is a long-term skeletal adaptation to regular exercise?

• A. Short-term fatigue
• B. Joints become more unstable
• C. Flexibility decreases
• D. Cartilage thickens

Answer: (D)

Regular, long-term loading of joints prompts the skeletal system to adapt by strengthening the structures that cushion and support movement. Articular cartilage responds to consistent mechanical stress by producing more of its matrix, which makes the cartilage thicker and better at absorbing impact. This cushioning helps joints cope with repeated stress and reduces wear over time. Short-term fatigue is a temporary response rather than a lasting structural change. Joints becoming more unstable would be harmful and is not a typical adaptation to regular exercise. Flexibility often improves with ongoing training, especially when combined with stretching, rather than decreasing. So, cartilage thickening is the clear long-term skeletal adaptation to regular exercise.

Regular, long-term loading of joints prompts the skeletal system to adapt by strengthening the structures that cushion and support movement. Articular cartilage responds to consistent mechanical stress by producing more of its matrix, which makes the cartilage thicker and better at absorbing impact. This cushioning helps joints cope with repeated stress and reduces wear over time.

Short-term fatigue is a temporary response rather than a lasting structural change. Joints becoming more unstable would be harmful and is not a typical adaptation to regular exercise. Flexibility often improves with ongoing training, especially when combined with stretching, rather than decreasing. So, cartilage thickening is the clear long-term skeletal adaptation to regular exercise.