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通过对横竖错觉的对比，揭示了形成跳高视错觉的原因。另外，还针对视错觉产生的心理效应，介绍了几种增强跳高运动员跳越“高横杆”自信心的训练手段，目的在于提高运动员的跳高成绩。 相似文献
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罗亦可 《武汉体育学院学报》2002,36(5):138-139
在跳高教学中，视错觉导致学生不良的心理反应是众所周知的，这无疑是影响教学效果的一个重要因素。通过试验，对跳高教学中的视错觉的成因，以及对跳高成绩的影响作了初步的研究。 相似文献
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姜晓天 《沈阳体育学院学报》2005,24(2):65-67
采用运动学和动力学同步实验等研究方法,对30名男子跳高运动员的"超等长"收缩能力进行生物力学研究,针对影响跳高运动员起跳效果的退让性工作能力、蹬伸能力进行不同级别运动员的对比分析,为跳高运动员的专项力量训练提供理论依据. 相似文献
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背越式跳高运动员的心理训练方法 总被引：1，自引：0，他引：1
在背越式跳高训练中,由于教练员忽视对运动员心理素质的训练,导致运动员在大赛中发挥不出自己的正常水平。出现"克拉克现象"、"Chok ing现象"等不利于比赛水平发挥的心理现象。因此,加强心理训练对提高背越式跳高运动员运动成绩具有重要的作用。根据背越式跳高的项目特点,背越式跳高运动员应具有自信强化等六种心理素质。 相似文献
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通过文献资料及比较分析法,对国内外优秀跳高运动员的身体形态和年龄特征进行比较分析.发现我国优秀跳高运动员的身体形态与世界优秀运动员存在一定差距;我国优秀跳高运动员早熟现象严重,保持高水平的年限和退役年龄与世界优秀运动员均有一定的差距. 相似文献
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跳高、排球运动员膝关节屈伸肌群生物力学的特征 总被引：2，自引：1，他引：1
通过应用Cybex-6000等速测试系统对22名排球运动员和28名跳高运动员膝关节肌力进行等速向心肌力测试,以探讨排球、跳高两个不同项目运动员膝关节屈伸等速肌力特征及差别.测试结果表明:跳高运动员优势腿、非优势腿股四头肌相对峰力矩在360(o)/s和90(o)/s上均大于排球运动员;而排球运动员腘绳肌相对峰力矩与跳高运动员无明显差异,排球运动员双侧腘绳肌峰力矩(90(o)/s)差异程度显著小于跳高运动员;排球运动员在90(o)/s的速度下测得的股四头肌与胭绳肌峰力矩比值(H/Q)要显著低于跳高运动员,随着角速度的变化(90~360(o)/s),排球运动员和跳高运动员股四头肌与胭绳肌峰力矩比值(H/Q)均随之增大. 相似文献
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运动员要先学习掌握起跳技术后,再学习掌握助跑技术。当短程跳高技术掌握了,再学习中程跳高技术。最后到掌握全程跳高技术。学习助跑时,应先以"走"的形式练习,等到运动员对动作的概念理解清楚后再过渡到慢跑,最后到快跑。在助跑起跳掌握后与过杆衔接前,可先让运动员进行跳上 相似文献
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刘建 《沈阳体育学院学报》2005,24(4):62-63,70
采用生物力学研究方法对30名跳高运动员进行等动测试,针对跳高运动员下肢力量发展的均衡性特征进行分析,得出了跳高运动员下肢肌三关节强弱侧力量发展的特征,并给出了一级和二级水平跳高运动员下肢三关节伸屈肌力量的合理比例。 相似文献
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本文通过文献资料法分析跳高项目各个环节的技术要求,分析青少年跳高运动员所需要的专项身体素质及其决定因素,探求提高青少年跳高运动员专项身体素质的方法和手段,为跳高运动员训练提供参考,从而更有效的提高运动员的跳高成绩。 相似文献
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This study examined the effect of carbohydrate ingestion on metabolic and performance-related responses during and after a simulated 1h cycling time trial. Eight trained male cyclists (VO 2 peak = 66.5ml kg -1 min -1 ) rode their own bicycles mounted on a windload simulator to imitate real riding conditions. At a self-selected maximal pace, the cyclists performed two 1h rides (separated by 7 days) and were fed either an 8% carbohydrate or placebo solution. The beverages were administered 25 min before (4.5ml kg -1 ) and at the end (4.5ml kg -1 ) of the ride. With carbohydrate feeding, plasma glucose tended (P = 0.21) to rise before the time trial. Compared with rest, the plasma glucose concentration decreased significantly (P < 0.05) at the end of both rides, with no statistically significant difference being observed between treatments. Thereafter, plasma glucose increased significantly (P < 0.05) at 15 and 30 min into recovery, and was significantly higher at 30 min during the carbohydrate trial compared with the placebo trial. No significant changes in plasma free fatty acids were observed during the ride. However, a significant increase (P < 0.05) in free fatty acids was found at 15 and 30 min into recovery, with no difference between trials. Mean power output was significantly (P < 0.05) greater during the carbohydrate compared with the placebo trial (mean - S.E.: 277-3 and 269-3W, respectively). The greater distance covered in the carbohydrate compared with the placebo trial (41.5-1.06 and 41.0–1.06km, respectively; P < 0.05) was equivalent to a 44s improvement. We conclude that pre-exercise carbohydrate ingestion significantly increases endurance performance in trained cyclists during a 1h simulated time trial. Although the mechanism for this enhancement in performance with carbohydrate ingestion cannot be surmised from the present results, it could be related to a higher rate of carbohydrate oxidation, or to favourable effects of carbohydrate ingestion on the central component of fatigue. 相似文献
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Roy J. Shephard 《Journal of sports sciences》2013,31(7):603-620
The biology and medicine of rowing are briefly reviewed. Effort in a 2000 -m race is about 70% aerobic. Because the boat (and in some instances a cox) must be propelled, successful competitors are very tall, with a large lean mass and aerobic power. Large hearts may lead to erroneous diagnoses of a cardiomyopathy. Large respiratory minute volumes must be developed by chest muscles that are also involved in rowing. The vital capacity is typically large, and breathing becomes entrained. Expiration cannot be slowed relative to inspiration (as normally occurs at high rates of ventilation) and the limiting flow velocity may be reached, with the potential for airway collapse. Performance is strongly related to the power output at the ‘anaerobic threshold’, and lactate measures provide a guide to an appropriate intensity of endurance training. Peak blood lactate levels are higher in males (commonly 11–19 mmol·l -1 and occasionally as high as 25 mmol·l -1) than in females (9–11 mmol·l -1), probably because males have a greater muscle mass in relation to blood volume. The skeletal muscles are predominantly slow twitch in type, developing an unusual force and power at low contraction velocities. Many rowers have a suboptimal diet, eating excessive amounts of fat. Lightweight rowers also have problems of weight cycling. Aerobic power and muscle endurance often change by 10% over the season, but such fluctuations can be largely avoided by a well-designed winter training programme. Injuries include back and knee problems, tenosynovitis of the wrist and, since the introduction of large blades, fractures of the costae. 相似文献
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重新认识体育的社会关联 总被引：3，自引：1，他引：2
体育与政治之间存在一个悖论，体育的发展与经济实力之间没有直线相关，体育与教育部分重叠，体育与宗教最为近缘，体育可借用科学手段，体育的艺术禀性日益明显，体育与养生反映着两种人生观。 相似文献
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本文在专家访谈、问卷调查、数理统计和文献资料分析的基础上,探析了上海社区体育竞赛参与者的特点、参与者对社区体育赛事运作管理的看法等问题。在此基础上从引进社区体育赛事的志愿者、整合社区体育赛事的各种资源、开发社区体育竞赛的无形资产、组建非营利性的专业团队、规范社区体育赛事的服务管理等方面提出了进一步满足上海社区居民日益增长的体育竞赛参赛需求的对策与措施。 相似文献
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对全面把握游泳训练环节的探讨 总被引：4，自引：0，他引：4
从系统观点出发,结合训练实践,对全面把握游泳训练环节进行探讨。认为应强化非智力因素在运动员多年训练中的作用,在育材全过程中不断选材,从整体上把握动态训练的全过程,把培养高水平运动员的整个过程置于一个严格的科学控制之下。 相似文献
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影响和限制耐力性运动项目的成绩的生理因素是复杂的和多方面的,取决于训练的强度和运动成绩.大强度持续性运动可导致呼吸肌疲劳.运动性呼吸疲劳可能在决定运动耐量方面起到关键的作用：一方面通过直接影响运动肌力量的生成（外周疲劳）,另一方面,通过肢体用力自感不安反馈引起工作肌运动单位输出功率下降（中枢疲劳）.对呼吸肌进行训练,可能有助于提高耐力性项目的运动成绩. 相似文献
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青少年业余足球运动员运动倾向性5因素结构模型初探 总被引：3，自引：0，他引：3
根据Scanlan等人最新提出的运动倾向性理论模型,结合我国实际情况建立了青少年足球运动员运动倾向性5因素结构模型。运动倾向性被定义为:渴望和决心继续参加足球运动的心理状态。所建立的5因素结构模型认为,运动倾向性是由运动乐趣、参与选择、个人投入、社会约束及参与机会5个因素决定。经确定5个决定因素和运动倾向性的操作定义,编制了相应调查问卷,通过对北京市252名青少年足球运动员实测结果,建立运动倾向性及其影响因素的协方差结构模型,用Lisre 18分析的结果表明:该运动倾向性模型比较符合北京青少年足球运动员。其中运动乐趣、个人投入、参与机会和参与选择4因素对运动倾向性有影响;社会约束对运动倾向性影响不大。 相似文献
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The aim of this study was to assess the sensitivity of the lactate minimum speed test to changes in endurance fitness resulting from a 6 week training intervention. Sixteen participants (mean +/- s :age 23 +/- 4 years;body mass 69.7 +/- 9.1 kg) completed 6 weeks of endurance training. Another eight participants (age 23 +/- 4 years; body mass 72.7 +/-12.5 kg) acted as non-training controls. Before and after the training intervention, all participants completed: (1) a standard multi-stage treadmill test for the assessment of VO 2max , running speed at the lactate threshold and running speed at a reference blood lactate concentration of 3 mmol.l -1 ; and (2) the lactate minimum speed test, which involved two supramaximal exercise bouts and an 8 min walking recovery period to increase blood lactate concentration before the completion of an incremental treadmill test. Additionally, a subgroup of eight participants from the training intervention completed a series of constant-speed runs for determination of running speed at the maximal lactate steady state. The test protocols were identical before and after the 6 week intervention. The control group showed no significant changes in VO 2max , running speed at the lactate threshold, running speed at a blood lactate concentration of 3 mmol.l -1 or the lactate minimum speed.In the training group, there was a significant increase in VO 2max (from 47.9 +/- 8.4 to 52.2 +/- 2.7 ml.kg -1 .min -1 ), running speed at the maximal lactate steady state (from 13.3 +/- 1.7 to 13.9 +/- 1.6 km.h -1 ), running speed at the lactate threshold (from 11.2 +/- 1.8 to 11.9 +/- 1.8 km.h -1 ) and running speed at a blood lactate concentration of 3 mmol.l -1 (from 12.5 +/- 2.2 to 13.2 +/- 2.1 km.h -1 ) (all P ? 0.05). Despite these clear improvements in aerobic fitness, there was no significant difference in lactate minimum speed after the training intervention (from 11.0 +/- 0.7 to 10.9 +/- 1.7 km.h -1 ). The results demonstrate that the lactate minimum speed,when assessed using the same exercise protocol before and after 6 weeks of aerobic exercise training, is not sensitive to changes in endurance capacity. 相似文献