Strength training is effective in increasing bone density by applying stress to the bones, stimulating a process called bone remodeling. This process involves the breakdown of old bone tissue and the formation of new bone, which enhances bone strength. Weight-bearing exercises, such as resistance training, encourage the deposition of minerals like calcium into the bone matrix. Increased bone density can help prevent conditions such as osteoporosis later in life. Therefore, incorporating strength training into a fitness routine is essential for maintaining healthy bones.