How can resistance training affect bone density?

Resistance training can significantly impact bone density through the application of mechanical stress to the bones during exercise. When one performs resistance training, the muscles exert force on the bones to which they are attached. This mechanical loading is a crucial stimulus for bone remodeling, which is the process of bone resorption and formation. The stress placed on the bones encourages osteoblast activity, the cells responsible for bone formation, leading to an increase in bone density over time. This adaptation is especially beneficial in preventing conditions like osteoporosis, where bone density may decrease, making bones more susceptible to fractures. Hence, the positive correlation between resistance training and increased bone density highlights the importance of incorporating such exercises into fitness regimens, particularly for populations at risk of low bone density.