Physical activity interventions: effects of duration and intensity
Physical activity interventions: effects of duration and intensity
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DOI：
10.1111/j.1600-0838.2011.01303.x
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发表时间：
2011-12-01
影响因子：
4.1
通讯作者：
Baker, J. S.
中科院分区：
文献类型：
--
作者：
Buchan, D. S.;Ollis, S.;Baker, J. S.
本研究的目的是检验在7周内不同强度的运动对身体素质组成部分和心血管疾病（CVD）风险因素的影响。47名男孩和10名女孩（年龄为16.4±0.7岁）被分为中等强度组、高强度组或对照组。所有参与者在干预前后除了四项体能测试外，还记录了肥胖指数和血压。此外，干预组在干预的第4周重复进行体能测试。干预后，高强度组在20米多级穿梭跑测试（20 MSFT）、敏捷性、原地纵跳（CMJ）和10米冲刺方面有显著改善（P<0.05）。中等强度组的参与者在干预后的原地纵跳和20米多级穿梭跑测试方面有显著改善（P<0.05）。仅中等强度组在干预后体脂百分比有显著改善（P<0.01）。有趣的是，高强度组在干预后收缩压有显著改善（112±10比106±11毫米汞柱）（P = 0.017）。总之，7周的高强度运动是提高青少年身体素质重要组成部分的一种非常高效的方式。
The purpose of this study was to examine the effects of exercising at different intensities over 7 weeks on components of physical fitness and CVD risk factors. Forty-seven boys and 10 girls, (16.4 +/- 0.7 years of age) were divided into a moderate, high intensity, or a control group. All participants had indices of obesity and blood pressure recorded in addition to four physical performance measures pre- and post-intervention. In addition, the intervention groups repeated the physical performance measures at the 4th week phase of the intervention. Following the intervention, significant improvements (P < 0.05) in the high-intensity group were found in the 20 MSFT, agility, CMJ and 10m sprint post-intervention. Participants in the moderate intensity group displayed significant improvements (P < 0.05) in both the CMJ and 20 MSFT post-intervention. Body fat % significantly improved (P < 0.01) in the moderate group only post-intervention. Interestingly, Systolic blood pressure significantly improved post-intervention (112 +/- 10 vs 106 +/- 11 mmHg) (P = 0.017) in the high intensity group. In conclusion, high-intensity exercise over 7 weeks is a very time efficient means of improving important components of physical fitness in adolescents.