Strength training positively affects bone density by stimulating bone formation and reducing the risk of osteoporosis. When muscles contract during strength exercises, they exert force on bones, prompting them to adapt by increasing density and strength. This process is particularly important for older adults, whose bone mass naturally decreases with age. Regular strength training encourages the retention and growth of bone tissue by enhancing the balance of calcium and other essential nutrients in the body. Therefore, incorporating strength training into a fitness regimen is crucial for maintaining healthy bones over time.