(1) Exercise stress plays an important role in regulating bone growth and growth. Mechanical stimuli cause deformation and induce fluid movement in the interstitial space, leading to changes in the direction and manner of cell movement, and increase nutrient and metabolite transport, and at the same time promote bone formation. Compared with calcium intake and sun exposure, the increase in exercise bone mass is significantly greater.
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(2) exercise can increase blood flow within the bone, bring nutrition, take away metabolites, so that the activity of bone cells increased, promote bone formation; maintain the local environment within the bone neutrality, inhibit bone calcium dissolution, prevent osteoporosis .
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(3) Exercise can promote the secretion of sex hormones. The relationship between sex hormones and bone metabolism is very close. Estrogen is an important factor in the stabilization of bone calcium. After menopause in women, due to the decrease of estrogen levels, bone loss is accelerated. Exercise increases estrogen levels in postmenopausal women and increases bone calcium content.
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(4) Proper long-term systemic exercise can promote blood circulation and neurohumoral regulation, promote the absorption and utilization of calcium, phosphorus, manganese and other elements, and promote the transfer of blood calcium into bone and the transition from osteoclast to osteoblast. These all lead to benign changes in bone structure, such as increased bone physical strength and firmness, thickening of bone density, delayed and reduced bone degenerative changes.
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(5) In addition, most of the physical exercise is conducted outdoors, and the exercise process can obtain suitable sunlight and promote the synthesis of vitamin D in the body so as to facilitate the absorption and utilization of calcium.
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(6) exercise can increase muscle strength, coordination and balance, enhance the body's flexibility, stability, reduce the chance of falling, collision, thereby reducing the risk of secondary osteoporosis caused by fractures.
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