Weight-bearing exercises, such as strength training and high-impact activities, are best for improving bone density. These exercises force the body to work against gravity, stimulating bone formation and reducing the risk of osteoporosis. Examples include running, jumping, and resistance training with weights. Engaging in regular weight-bearing exercises helps maintain and build bone mass, especially in individuals at risk of bone loss due to aging or hormonal changes. Additionally, combining these exercises with a diet rich in calcium and vitamin D can further enhance bone health.