The relationship between bone density and physical activity is crucial for overall skeletal health. Regular weight-bearing and resistance exercises stimulate bone formation and increase bone strength. Activities such as walking, running, and weight lifting apply stress to bones, triggering the osteoblasts, the cells responsible for bone formation, to create new bone. Conversely, a sedentary lifestyle can lead to bone loss and increase the risk of fractures. Therefore, engaging in regular physical activity is essential for maintaining strong bones, especially as individuals age.