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objective: to discuss the influence of extracurricular exercise on high school girls’ bone density and bone metabolism.
Method: choose 60 healthy high school students as the research objects, then divide them into exercise group
and control group. Employ the Japan MODULAR automatic biochemical analyzer and Enzyme-labeled meter (S200)
made in America Thermo Company to test the bone metabolism index; employ the lunar prodigy dual X-ray absorptiometry
to measure bone density. Results: among the students of exercise group, their bone density of ward triangle, trochanter
and lumbar L2 are higher than that of control group (P<0.01), mean density of hip femoral neck of these two groups has
no statistically significant deference; the serum calcium, phosphorus concentration and BGP mean are higher than that of
reference group((P<0.01), ALP is also higher than that of control group (P<0.05), tartrate resistant acid phosphatase mean
is slightly lower than that of the reference group (P<0.01). Conclusion: long-term extracurricular exercise can effectively
improve high school girls’ bone density and bone quality, and is conductive to improve their bone metabolism.