| （1.College of Physical Education,Jiangxi Science and Teachnology Normal University，Nanchang 330013,China;2.Department of Sports Science,Shanghai Institute of Physical Education,Shanghai 200438,China;3.College of Physical Education,Zhejiang Normal University,Jinhau 321004,China) Abstract: To know the relationship between bone mineral density and jump power of the inferior limb in male teenagers and the effect of sport training on it，63 Shanghai schoolboys aged 10-20 years were measured, and they were divided into 10-15 years group (including 26 subjects ) and 16-20 years group (including 37 subjects). Each of the group was re-divided into exercise-training group and non-exercise-training group. The values of BMD were detected by the Hologic Sahara Clinical Bone Sonometer, the jump performances were measured by the Rebound Jumping Device. results: The values of BMD show a increasing tendency during adolescence. And there are significant differences of the values of BMD between 10-15years group and 16-20 years group;The values of BMD in training groups were significant difference with the values of BMD in non- training groups,which showed exercise-training can increase the values of BMD;The index reflecting the jump power of the inferior limb has a significant correlation with the values of BMD,and sport training can affect this correlation.
Key words:male adolescent; bone mineral density; jump power of the inferior limb; sport training |
