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为了了解递增负荷运动对心电频谱分析的影响,我们采用标准12导联引导心电信号,测试了30名大学生在递增负荷运动中的心电频谱图,所测得结果提示如下:频率成分能量比W1〔W1=E(100-1000Hz)/E(0-1000Hz)〕,W2〔W2=E(80-300Hz)/E(0-1000Hz)〕,在一、二级负荷运动后增大(P＜0.05),三级负荷后恢复到安静水平。 相似文献
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探讨黄芪总苷对运动性疲劳大鼠骨骼肌抗氧化能力、ATP酶活性及乳酸含量的影响。方法：应用力竭性游泳方法制作运动性疲劳大鼠模型,对大鼠预防性给予黄芪总苷,观察大鼠骨骼肌抗氧化能力ATP酶活性及乳酸含量的变化。结果：黄芪总苷明显提高运动性疲劳大鼠骨骼肌的POD,T-AOC和Ca^2＋Mg^2＋-ATPase的活性,降低LD的含量（P〈0.05）。结论：黄芪总苷具有保护运动性疲劳大鼠肌组织的作用,其机制可能与提高骨骼肌抗氧化能力,改善肌肉组织能量代谢有关。 相似文献
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Psychological and educational researchers have developed a flourishing research program on epistemological dimensions of cognition (epistemic cognition). Contemporary philosophers investigate many epistemological topics that are highly relevant to this program but that have not featured in research on epistemic cognition. We argue that integrating these topics into psychological models of epistemic cognition is likely to improve the explanatory and predictive power of these models. We thus propose and explicate a philosophically grounded framework for epistemic cognition that includes five components: (a) epistemic aims and epistemic value; (b) the structure of knowledge and other epistemic achievements; (c) the sources and justification of knowledge and other epistemic achievements, and the related epistemic stances; (d) epistemic virtues and vices; and (e) reliable and unreliable processes for achieving epistemic aims. We further argue for a fine-grained, context-specific analysis of cognitions within the five components. 相似文献
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笔者测试分析了１０名男性大学生足球运动员在安静状态下及递增负荷运动后的高频心电图。结果提示：在三级负荷运动中高频切迹的量一双向变化过程及一、二级负荷后高频切迹数增加，而第三级负荷后又恢复到安静水平 相似文献
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目的 探讨黄芪总苷对运动性疲劳大鼠胃粘膜胃泌素基因表达及氧自由基含量的影响.方法 实验动物分为3组,每组8只,即正常对照组、模型组和黄芪总苷组.应用力竭游泳方法制作运动性疲劳大鼠模型,观察胃粘膜损伤指教,检测胃粘膜SOD活性、MDA含量,RT-PCR法测定胃泌素mRNA表达变化.结果 黄芪总苷预防给药可以明显减轻运动性疲劳大鼠胃粘膜损伤指数,降低MDA含量,升高SOD活性,显著增加胃泌素基因表达.结论 黄芪总苷对运动性疲劳大鼠胃粘膜损伤有保护作用,其保护机制可能与增加胃泌素基因表达,并参与抗氧自由基损伤有关. 相似文献
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主要探讨了渐进抗阻练习对大学生肌肉力量的影响。方法：健康大学生30名,采用Thera-Band渐进式弹性阻力带进行渐进抗阻练习16周,测量训练前后上、下肢的肌力。结果：30名大学生在进行渐进抗阻训练后,其肌力有显著的提高（P〈0.05）。结论：渐进抗阻练习能有效增加大学生的力量素质。 相似文献
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运用问卷调查法、数理统计法,调查、评价、分析56名高校教师有氧运动前后的情绪焦虑和睡眠质量情况.结果表明,进行有氧运动后的匹兹堡睡眠质量指数明显小于运动前(P＜0.05);进行有氧运动后高校教师的焦虑自评量表标准分均值明显小于运动前(P＜0.05).结论:有氧运动可有效缓解心理压力和焦虑情绪,调理睡眠、改善睡眠质量,是一种安全可行、积极有效的方法. 相似文献
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ALA H. AL-RABEH HABIB ABU AL-HAMAYEL MOHAMMAD HASNAIN MUSTAFA AL-MANDIL 《European Journal of Engineering Education》1986,11(2):205-212
At the University of Petroleum and Minerals (UPM) undergraduate engineering education has followed two main streams: applied engineering and engineering science. This paper is concerned with a comparative study of the two streams, with the aim of indicating in broad general terms the direction which engineering education at UPM must take if it is to meet the demands of the future. To understand the process engineering education and to gain a prospective on future possibilities, a survey of the following groups was conducted: senior students at UPM, practicing engineers of both programs, selected employers of UPM engineering graduates, expert opinion from outside UPM. The study concludes that engineering programs at UPM should continue to have the following directions: (I) applied engineering: concentrates on design, operation and maintenance; (ii) engineering science: concentrates on design, analysis and research
Relevant recommendations concerning duration and supervision of the industrial training period are made 相似文献
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