| Summary: | 碩士 === 國立臺灣師範大學 === 體育學系 === 96 === The purpose of this study is to explore the effects of 16-week rope-jumping training on elementary school students’bone mineral density (BMD) and physical fitness. The partici- pants are forty-one 6th male students with normal and health body conditions at Da-Min Elementary School in Taichung County. The participants are randomly dividing into two groups: rope-jumping group(RG, n＝21) and control group(CG, n＝20) respectively. RG trains 3 days a week, 30 minutes a day for 16weeks. Training intensity, in terms of heart beat rate, is between 60%~85%, whereas the CG maintains normal diet and work schedule.
The participants are tested calcaneus BMD with a quantitative ultrasonography before and after the training. In the mean time, the students are tested for their body components, flexibility, muscular endurance, power, and cardiovascular endurance pursuant to the Physical Fitness Test, issued by the Education Ministry. The data, which gathered in the test, are then statistically analyzed with t-test of the depend and independent samples. The results are as the following:
(1) using t-test of the depend samples on differences between groups in terms of pre-test and post-test found that, both groups show significant progress on calcaneus BMD and cardio- vascular endurance, as RG demonstrated better progress than the CG. However, both groups show no significant progress on body component, flexibility, muscular endurance, and power.
(2) using t-test of the independent samples for post-test on differences between groups found that, in terms of calcaneus’ BMD and cardiovascular endurance, the results of RG is significantly better than that of CG, whereas on body component, flexibility, muscular endurance, and power that the results of RG is higher than that of CG but showing no significance.
The conclusion is that rope-jumping training showed the significant effects on increase of elementary school students’ calcaneus BMD and cardiovascular endurance.
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