Purpose: The aim of the present study is to examine the performance of young Japanese cross-country skiers of different competitive levels with the use of Yo-Yo tests and the 12-minute run test (12MRT) that have been ...Purpose: The aim of the present study is to examine the performance of young Japanese cross-country skiers of different competitive levels with the use of Yo-Yo tests and the 12-minute run test (12MRT) that have been demonstrated to be related to each level, and to know which test is suitable for different competitive performance. Methods: Elite group (N = 9) was 16.9 ± 0.3 years and moderate trained group (N = 22) was 16.1 ± 0.9 years. The testing sessions consisted of the following: 1) Vertical jump and 50m sprint;2) the Yo-Yo tests level 1 and 2 (intermittent recovery);3) 12MRT. Results: Results showed the vertical jump heights and 50m sprint that no significant both performances differences were found among the two groups. Significant the Yo-Yo tests and 12MRT performances differences were found between the two groups (p < 0.05). Performance test (%) showed the ratio of moderate trained group towards elite group. The Yo-Yo tests performance was low enough compared with the result of 12MRT in moderate trained group. Conclusions: It is therefore valid to assume that low Yo-Yo tests performance due to immature anaerobic in cross-country skiers was a new limiting factor in the competitive level.展开更多
目的:系统评价HIIT对提高国外青少年运动员有氧运动能力的应用效果,并与其他形式训练比较,以期为国内青少年训练提供一些借鉴。方法:检索Pubmed、EBSCO host、Web of Science和CNKI数据库,检索期限到2019年9月16日,收集高强度间歇训练对...目的:系统评价HIIT对提高国外青少年运动员有氧运动能力的应用效果,并与其他形式训练比较,以期为国内青少年训练提供一些借鉴。方法:检索Pubmed、EBSCO host、Web of Science和CNKI数据库,检索期限到2019年9月16日,收集高强度间歇训练对9~18岁国外青少年运动员有氧运动能力相关的研究,Chochrane偏倚风险评估工具对纳入文献进行方法学质量评价,Stata 13.0软件进行统计分析。结果:共纳入25篇国外文献,涉及受试者540名。Meta分析结果显示,HIIT在提高国外青少年运动员最大摄氧量(SMD=0.56,95%CI[0.30,0.82])上明显优于其他形式训练(P=0.00);对提高递增负荷最大有氧跑速(SMD=0.01,95%CI[-0.31,0.33])、提高Yo-Yo间歇性恢复测试表现(SMD=0.68,95%CI[-0.30,1.66])和降低最大血乳酸浓度(SMD=-0.04,95%CI[-0.50,0.42])与其他形式训练没有显著差异。结论:1)与其他形式训练相比,高强度间歇训练(HIIT)能更有效地提高国外青少年运动员的VO 2max;2)Yo-Yo间歇性恢复测试(YYIRTL1)是评价运动员持续进行间歇运动达到最大激活有氧系统能力的重要递增负荷体能测试方式,HIIT与其他形式训练相比在提高YYIRTL1表现上有显著优势;3)在提高递增负荷最大跑速、降低最大血乳酸浓度上,HIIT与其他形式训练相比并没有明显的优越性,受到纳入文献数量、质量的影响需要进一步的研究才能得出更稳健的结论。研究结果显示HIIT具有省时高效的特点,能提升效率并减少青少年运动员体能训练的时间。展开更多
文摘Purpose: The aim of the present study is to examine the performance of young Japanese cross-country skiers of different competitive levels with the use of Yo-Yo tests and the 12-minute run test (12MRT) that have been demonstrated to be related to each level, and to know which test is suitable for different competitive performance. Methods: Elite group (N = 9) was 16.9 ± 0.3 years and moderate trained group (N = 22) was 16.1 ± 0.9 years. The testing sessions consisted of the following: 1) Vertical jump and 50m sprint;2) the Yo-Yo tests level 1 and 2 (intermittent recovery);3) 12MRT. Results: Results showed the vertical jump heights and 50m sprint that no significant both performances differences were found among the two groups. Significant the Yo-Yo tests and 12MRT performances differences were found between the two groups (p < 0.05). Performance test (%) showed the ratio of moderate trained group towards elite group. The Yo-Yo tests performance was low enough compared with the result of 12MRT in moderate trained group. Conclusions: It is therefore valid to assume that low Yo-Yo tests performance due to immature anaerobic in cross-country skiers was a new limiting factor in the competitive level.
