Weight-bearing exercise increases bone density.

Weight-bearing exercise increases bone density.

• A. Increases bone density
• B. Decreases bone density
• C. No effect
• D. Only affects ligaments

Answer: (A)

Weight-bearing exercise loads the bones, and bones adapt to that loading by forming more bone tissue to cope with the stress. This activity stimulates osteoblasts to increase bone mineral content, so bone density rises over time. This adaptive process, often described by Wolff’s law, makes bones stronger and less prone to fractures. That’s why weight-bearing activities such as running, jumping, and resistance work are effective for increasing bone density. The other options don’t fit because reducing density or having no effect contradicts the way bone remodeling responds to mechanical load, and ligaments aren’t where bone density changes are measured, though they can become stronger with use.

Weight-bearing exercise loads the bones, and bones adapt to that loading by forming more bone tissue to cope with the stress. This activity stimulates osteoblasts to increase bone mineral content, so bone density rises over time. This adaptive process, often described by Wolff’s law, makes bones stronger and less prone to fractures. That’s why weight-bearing activities such as running, jumping, and resistance work are effective for increasing bone density. The other options don’t fit because reducing density or having no effect contradicts the way bone remodeling responds to mechanical load, and ligaments aren’t where bone density changes are measured, though they can become stronger with use.