Effect Of Physical Activity On Bone Density And Bone Metabolism In Male College Students

A lot of studies have emerged on prevention and treatment of Osteoporosis by means of physical activity these years, as becomes a researching hot point in the field of sports medicine and the clinical medicine. In order to further explore the benefits of reasonable exercise on maintaining bone health and examine the effect of exercise on skeleton of young college students, 20 male students of college were divided into exercise group (participates bodybuilding frequently) and control group (sedentary), some indexes of bone metabolism and bone mineral density (BMD) were observed and analyzed.Methods: documentation and experiments, documentation is applied to examine basic medicine, clinical medicine, sports science, sports medicine and sports mechanics and so on, studied 150 articles on bone metabolism related with sport. Experiments measured the bone thickness of spine and left femoral neck applying dual energy X-ray bone thickness analytical instrument (DEXA) ; Serum testosterone by means of radioimmunoassay, successively measured alkaline phosphates (ALP) in blood.and Hydroxyproline (HOP) in urine.Results of documentation: physical activity affects BMD and bone mass during different periods of human being; different intensities and forms of exercises have different effects on BMD and bone metabolism; over-training may decrease bone mass, BMD and sexual hormone, which indicates suitable intensity and form of exercise benefits bone metabolism and bone density.Results of experiment: the level of bone density and bone mass of spine and left femoral neck in exercise group is relatively higher than control group; the concentration of serum testosterone is remarkably higher than control group(P<0.05); blood ALP is higher, U-HOP, U-Ca and U-HOP/U-Cr, U-Ca/U-Cr ratio are lower in exercise group compared with control group, but fails to reach significant level.Conclusion: regular and moderate bodybuilding exercise is beneficial to the level of resting serum testerosterone in male college students; regular and moderate bodybuilding exercise may affect bone metabolism by increasing the formation of bone and decreasing the absorb of bone to increase the BMD and bone mass, which may benefit to increase the peak bone mass; quick rhythm, shock, multidirection physical activity is beneficial to increase bone mass and keep bone healthy.