Strength training significantly affects bone density by stimulating bone growth and increasing mineral density. This occurs through the stress placed on bones during resistance exercises, which encourages the activity of osteoblasts, the cells responsible for bone formation. Regular participation in strength training not only enhances bone strength but also reduces the risk of osteoporosis as individuals age. Research indicates that both high-load and moderate-load strength training can positively impact bone health, making it a crucial component of a comprehensive fitness program for maintaining skeletal integrity.