期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
有效影响认知抑制功能的运动负荷域研究 被引量:2
1
作者 赵敬国 周洁 《生物医学工程研究》 2019年第2期196-200,共5页
确定有效改进认知抑制功能的运动负荷量域值,探讨等能耗量运动中运动强度对运动效果的影响作用。采用自身前后对照实验设计,以Stroop Color-Word Test反应时为认知抑制功能评价指标,以健康在校研究生(n=11)为实验对象,以功率自行车(MONA... 确定有效改进认知抑制功能的运动负荷量域值,探讨等能耗量运动中运动强度对运动效果的影响作用。采用自身前后对照实验设计,以Stroop Color-Word Test反应时为认知抑制功能评价指标,以健康在校研究生(n=11)为实验对象,以功率自行车(MONARK 839E)为运动负荷工具,观察比较了不同能耗量(0~300 Kcal、级差为25 Kcal)的运动对认知抑制能力的即刻影响;在此基础上进一步探讨了运动能耗量为100 Kcal时不同运动强度(10~100 watt、级差10 watt)对认知抑制功能的影响作用。采用SPSS15.0统计软件对测量结果进行了重复测量的方差分析和LSD两两比较。75 Kcal能量消耗的运动后,即刻反应时较安静时(0 Kcal)呈现最大程度缩短(P<0.05)。100~275 Kcal能量消耗运动后,即刻的反应时与75 Kcal能量消耗运动后即刻反应时相同(P>0.05)。300 Kcal能量消耗运动后,即刻反应时有所增加,且与275 Kcal能量消耗运动后即刻相比显著延长(P<0.05)。能耗量均为100 Kcal时,受试者采用10~100 watt(级差为10 watt)任一强度运动后,即刻的反应时值之间均无显著性差异(P<0.05)。在以功率车为工具的运动中,以Stroop Color-Word Test反应时为认知抑制功能评价指标时,每次运动消耗能量75~275 Kcal为有效改善认知抑制功能的运动负荷域值。且在该运动方式中,运动能耗量相同的情况下,不同强度运动后的即刻效应是相似的。 展开更多
关键词 运动负荷阈 认知抑制 运动能耗量 运动强度 能耗
下载PDF
The role of physical activity and exercise in obesity and weight management: Time for critical appraisal 被引量:1
2
作者 Petri Wiklund 《Journal of Sport and Health Science》 SCIE 2016年第2期151-154,共4页
The prevalence of overweight and obesity has increased dramatically during last 3 decades with devastating consequences to public health. Recommended strategies to reduce obesity have focused on healthier diet and phy... The prevalence of overweight and obesity has increased dramatically during last 3 decades with devastating consequences to public health. Recommended strategies to reduce obesity have focused on healthier diet and physical activity (PA). Clearly, these approaches have not been successful, but whether this is due to failure to restrict energy intake or to maintain high levels of energy expenditure has been the subject of great controversy. Consequently, there has been a great deal of confusion about the role of PA and exercise in obesity and weight management. In this article, the theoretical basis for considering reduced PA and energy expenditure as the cause of obesity is appraised. Further, the role of PA in food intake and weight control is examined. The idea that obesity is caused by consistent deeline in daily energy expenditure is not supported either by objective measures of energy expenditure or physiological theory of weight gain alone. However, since voluntary exercise is the most important discretionary component of total daily energy expenditure, it can affect energy balance. Therefore, PA and exercise hold potential as part of the solution for the ongoing obesity epidemic. 展开更多
关键词 Energy expenditure EXERCISE OBESITY OVERWEIGHT Physical activity
下载PDF
Tropical storm-forced near-inertial energy dissipation in the southeast continental shelf region of Hainan Island 被引量:5
3
作者 ZHANG ShuWen XIE LingLing +1 位作者 ZHAO Hui HOU YiJun 《Science China Earth Sciences》 SCIE EI CAS 2014年第8期1879-1884,共6页
Near-inertial motion is an important dynamic process in the upper ocean and plays a significant role in mass, heat, and energy transport across the thermocline. In this study, the dissipation of wind-induced near-iner... Near-inertial motion is an important dynamic process in the upper ocean and plays a significant role in mass, heat, and energy transport across the thermocline. In this study, the dissipation of wind-induced near-inertial energy in the thermocline is investigated by using observation data collected in July and August 2005 during the tropical storm Washi by a moored system at(19°35′N, 112°E) in the continental shelf region off Hainan Island. In the observation period, the near-inertial part dominated the observed ocean kinetic energy and about 80% of the near-inertial energy dissipated in the upper layer. Extremely strong turbulent mixing induced by near-inertial wave was observed in the thermocline, where the turbulent energy dissipation rate increased by two orders of magnitude above the background level. It is found that the energy loss of near-inertial waves in the thermocline is mainly in the large-scales. This is different from the previous hypothesis based on "Kolmogorov cascade" turbulence theory that the kinetic energy is dissipated mainly by small-scale motions. 展开更多
关键词 tropical storm Washi continental shelf region of Hainan Island near-inertial energy dissipation in thermocline
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部