17名大学生下肢爆发力研究：CMJ与CMJS动作的比较
A Study of Lower Limb Explosiveness in 17 College Students: A Comparison of CMJ and CMJS Movements

纵跳是大多数运动项目、体能评估以及全民健康测试的重要组成部分，也是反映下肢爆发力的重要指标，大学生体质健康状况日渐下降，为了大学生选择较好的纵跳激活方式和正确的纵跳训练方法，本研究采用文献资料法、实验法、数理统计法，通过比较17名大学生CMJ成绩和CMJS成绩实验前后数据的差异，分析不同方式纵跳产生的效果差异，探究不同方式纵跳对弹跳能力的效果。最后得出结论：1、11名男生CMJ与CMJS成绩符合正态性分布，经过配对t检验后显著性 < 0.05，说明男生半蹲跳前测成绩与后测成绩之间存在显著的差异，摆臂可以有效地提高纵跳运动成绩。2、6名女生CMJ与CMJS成绩符合正态性分布，经过配对t检验后显著性 < 0.05，说明女生半蹲跳前测成绩与后测成绩之间存在显著的差异。摆臂可以有效地提高纵跳成绩。3、独立样本t检验后，男生CMJ成绩与女生CMJ成绩有显著性差异，男生CMJS成绩与女生CMJS成绩有显著性差异。4、男生CMJ平均值高于女生14.49，男生SMJS平均值高于女生17.34，且后测平均值高于前测平均值2.85，表明男生使用摆臂后的增长空间比女生更大。
Vertical jumping is an important part of most sports, physical fitness assessment and national health test, and it is also an important indicator to reflect the explosive power of the lower limbs. By comparing the differences between the CMJ scores and the CMJS scores of 17 college students before and after the experiment, the differences in the effects of different vertical jumps were analyzed, and the effects of different vertical jumps on the bouncing ability were explored. Finally, it was concluded that: 1. The CMJ and CMJS scores of 11 boys were in a normal distribution, and the significance was <0.05 after paired t-test, indicating that there was a significant difference between the pre-test and post-test scores of boys’ half-squat jump, and the swing arm could effectively improve the performance of vertical jumping. 2. The CMJ and CMJS scores of 6 girls conformed to a normal distribution, and the significance < 0.05 after paired t-test, indicating that there was a significant difference between the pre-test and post-test scores of the girls’ half-squat jump. The swing arm can effectively improve the vertical jump performance. 3. After the t-test of independent samples, there was a significant difference between the CMJ scores of boys and girls, and there was a significant difference between the CMJS scores of boys and girls. 4. The average value of CMJ for boys was 14.49 for boys and 17.34 for girls, and the average value of post-test was higher than that of girls (2.85), indicating that boys had more room for growth than girls after using swing arms.