Bane loss

The decline in living bone tissue due to a combination of influences caused by aging that produce accelerated bone resorption (the normal dissolving phase of bone regeneration) and a decrease in the speed at which the bone is rebuilt. Bone loss is a complication of osteoporosis, a disease that thins and weakens the bones, which then become porous and vulnerable to fracture. In postmenopausal women, a reduced amount of the hormone estrogen at menopause is associated with bone loss, since estrogen helps the bones retain calcium to keep them dense and strong. Insufficient intake of calcium and vitamin D, which aids in calcium absorption, may also have a role. Men and women may be affected by bone loss. With age, fat mass increases, while muscle mass and skeletal mass decline. Weight-bearing exercise and all activities that put stress on bones, including weight-lifting, are known to maintain bone density and may even increase it. Weight training also strengthens muscles, which protect the bones and joints, and may help slow bone loss.


 


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