排序方式: 共有84条查询结果,搜索用时 15 毫秒
31.
跳绳是一项极佳的健体运动,不仅有助于保持形体健美、锻炼耐力,而且有助于心理健康和智力发展。这项运动对场地器材要求不高,具有广泛的适应性和推广性,对培养学生观察、判断、创造、想象等能力有重要作用。文章介绍跳绳训练对学生身体素质的促进作用,并对跳绳的训练策略及注意事项进行探讨。 相似文献
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实验结果表明,“花样跳皮筋”娱乐化教学较之传统体育教学效果更加明显,能更有效激发培养学生体育兴趣,调动学生学习积极性,营造愉快的学习氛围,从而更好地发展身体素质,提高运动能力. 相似文献
33.
尹燕佳 《连云港职业技术学院学报》2011,24(4):11-13
研究分析了原有提升系统的性能,提出了一套相对经济、便捷的改造方案。在保证安全的前提下,较好地解决了主井延深后的矿石提升问题。. 相似文献
34.
杨爱华 《西安体育学院学报》2004,21(3):80-84
采用文献资料法、数理统计法、逻辑方法等,对本选题进行系统研究。结果显示———世界三级跳远技术发展经历了五个阶段:(1)自由发展阶段;(2)以单足跳为主的技术;(3)平跳型技术;(4)以跳跃为主的技术;(5)以速度为基础的跳跃为主的综合型技术。 相似文献
35.
张昌辉 《重庆职业技术学院学报》2005,14(3):73-74,102
转型时期的社会问题尤其复杂、棘手,当代中国信访制度改革及由此引发的不休争论便是明证:作为信访问题具体的疑难杂症之一,越级上访本身包含着诸多悖论。厘清悖论,方能在微观中透视问题症结,寻求上访乃至信访问题的解决之道。 相似文献
36.
通过阅读大量文献、观摩优秀运动员比赛和训练及在训练中的亲身体验,对前倾式离板技术和摆动腿的摆动技术分别对跳远起跳过程中各环节的作用进行分析,提出前倾式离板和摆动腿的摆动,对跳远成绩具有十分重要的作用。 相似文献
37.
在如今的高校教育中,公共选修课已经成为了学分系统的一个重要部分,而现在盛行的"公选课逃课现象"却令人思索。文章重点从学生的角度探讨了公选课逃课的原因以及从公选课本身存在的缺陷,提出了改革高校公选课的一些思路方法。 相似文献
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39.
《European Journal of Sport Science》2013,13(1):13-20
Abstract Rock climbing is a popular adventure sport with an increasing research base. Early studies in the field did not make comparisons of ascents using different styles of climbing. More recently, differences in the physiological responses for an on-sight lead climb and subsequent lead climb have been reported. The purpose of the present study was to examine the effect of style of climb (lead climb or top rope climb) on the physiological and psychological responses to rock climbing. Nine intermediate climbers volunteered for, and completed, two randomly assigned climbing trials and a maximum oxygen uptake (VO2max) test on a separate occasion. The climbers ascended the same 6a (sport grade) climb for both trials. Before climbing, heart rate, perception of anxiety (Revised Competitive State Anxiety Inventory-2), and blood lactate concentration were measured. Climb time, heart rate, VO2, lactate concentrations, and task load (National Aeronautics and Space Administration Task Load Index) in response to each trial were also recorded. Results indicated significant differences (P<0.05) between the trials for climb time, blood lactate concentration immediately after and 15 min after climbing, and heart rate 1 min after climbing. During lead and top rope climbing, mean VO2 and represented 44% and 42% of treadmill VO2max and mean heart rate represented 81% and 77% of maximum heart rate, respectively. There were no significant differences in feelings of anxiety before either climb, although climbers reported the lead climb to be physically and mentally more demanding, requiring more effort and resulting in greater frustration (P<0.05) than the top rope climb. Our results indicate that the physiological and psychological responses of intermediate climbers are different for a lead climb and top rope climb. 相似文献
40.
分析(10+10)t电磁吊钢丝绳卷筒故障原因,介绍对传动轴、钢丝绳卷筒轴、卷筒毂等进行的设计与改造。 相似文献