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objective: to discuss the influence of extracurricular exercise on high school girls' bone density and bone me- tabolism. 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 absorptiome- try 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.

Influence of Extracurricular Physical Training on High School Girls’ Bone Density and Bone Metabolism Index