Resistance training positively impacts bone density by stimulating bone remodeling—where bone mass is increased in response to physical stress. Lifting weights or performing bodyweight exercises applies stress to the skeletal system, promoting the activity of osteoblasts that build new bone tissue. Increased bone density reduces the risk of osteoporosis and fractures, particularly in older adults. Therefore, incorporating resistance training into fitness routines is essential for maintaining bone health and overall skeletal integrity across the lifespan.