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对2002年世界杯场地自行车赛女子3km个人追逐赛的分析 总被引：1，自引：0，他引：1
收集了2002年世界杯第五站女子3km个人追逐赛的全部数据，对参赛的世界各国运动员在比赛中的表现作了统计学的分析，并由此对我国女子3km个人追逐赛的训练与发展提出了新的看法。 相似文献
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Lee P. Rylands Simon J. Roberts Howard T. Hurst 《European Journal of Sport Science》2017,17(2):127-131
The aim of this study was to ascertain if gear ratio selection would have an effect on peak power and time to peak power production in elite Bicycle Motocross (BMX) cyclists. Eight male elite BMX riders volunteered for the study. Each rider performed three, 10-s maximal sprints on an Olympic standard indoor BMX track. The riders’ bicycles were fitted with a portable SRM power meter. Each rider performed the three sprints using gear ratios of 41/16, 43/16 and 45/16 tooth. The results from the 41/16 and 45/16 gear ratios were compared to the current standard 43/16 gear ratio. Statistically, significant differences were found between the gear ratios for peak power (F(2,14)?=?6.448; p?=?.010) and peak torque (F(2,14)?=?4.777; p?=?.026), but no significant difference was found for time to peak power (F(2,14)?=?0.200; p?=?.821). When comparing gear ratios, the results showed a 45/16 gear ratio elicited the highest peak power,1658?±?221?W, compared to 1436?±?129?W and 1380?±?56?W, for the 43/16 and 41/16 ratios, respectively. The time to peak power showed a 41/16 tooth gear ratio attained peak power in ?0.01?s and a 45/16 in 0.22?s compared to the 43/16. The findings of this study suggest that gear ratio choice has a significant effect on peak power production, though time to peak power output is not significantly affected. Therefore, selecting a higher gear ratio results in riders attaining higher power outputs without reducing their start time. 相似文献
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我国的自行车训练水平不敌与国际先进水平仍存在差距,国际赛场上取得优异成绩也多为女子项目,以江永华、郭爽、宫金杰、钟天使等为代表,男子短距离项目难以成为国际自行车比赛的姣姣者。因此,本文通过介绍我国自行车速度能力训练的现状,分析短距离自行车力量训练类型,讨论男子短距离自行车训练的专项力量特征,最后探讨提升男子短距离自行车训练速度能力的训练方法。 相似文献
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孙良勇 《西安体育学院学报》2005,22(4):74-77
以参加“2002年全国少年自行车比赛”500 m计时赛项目的女选手共58人为研究对象,用逐步回归分析法、测量与评价理论,探讨了优秀参赛自行车女选手在12岁-14岁和15岁-17岁两个阶段的主导身体素质指标体系及其身体素质特征研究结果对女子自行车500 m计时赛运动员的主导身体素质进行了归类和年龄阶段划分。 相似文献
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宫志欣 《天津职业院校联合学报》2020,(3):99-103
近几年来,共享单车作为一种新兴的物流方式快速进入社会生活之中。其方便、快捷的特点满足了人们短途和行程接驳的需求,缓解了城市交通,使现代社会倡导的“环保低碳”出行成为可能。共享单车作为物流新锐,它的优势不容置疑,但在发展的进程中,一些外在和内在的问题也逐渐显露出来,极大阻碍了这一物流新军的发展,甚至使整个行业处于进退维谷的尴尬局面,研究共享单车的现状并加以分析,除弊兴利、革故鼎新是共享单车能否凤凰涅槃、浴火重生的重要途径。 相似文献
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本文以人体工程学的视点对自行车座垫进行初步的研究,并对国外品牌公司的既存商品和创新研究案例从人体工程学角度进行分析。论文内容分为四章,包括自行车座垫的概述,自行车座垫设计相关的人体工程学要素,基于人体工学的自行车座垫设计案例和结论。论文旨在把握较为完整的关于人体工程学自行车座垫设计的技术与信息,同时也提出了自行车座垫相关的人体工程学设计要素。 相似文献
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John Titlestad Tony Fairlie-Clarke Mark Davie Ian Watt Stanley Grant 《Journal of sports sciences》2013,31(2):125-135
Abstract The aim of this study was to compare the physiological and psychological responses of cyclists riding on a hard tail bicycle and on a full suspension bicycle. Twenty males participated in two series of tests. A test rig held the front axle of the bicycle steady while the rear wheel rotated against a heavy roller with bumps (or no bumps) on its surface. In the first series of tests, eight participants (age 19 – 27 years, body mass 65 – 82 kg) were tested on both the full suspension and hard tail bicycles with and without bumps fitted to the roller. The second series of test repeated the bump tests with a further six participants (age 22 – 31 years, body mass 74 – 94 kg) and also involved an investigation of familiarization effects with the final six participants (age 21 – 30 years, body mass 64 – 80 kg). Heart rate, oxygen consumption ([Vdot]O2), rating of perceived exertion (RPE) and comfort were recorded during 10 min sub-maximal tests. Combined data for the bumps tests show that the full suspension bicycle was significantly different (P < 0.001) from the hard tail bicycle on all four measures. Oxygen consumption, heart rate and RPE were lower on average by 8.7 (s = 3.6) ml · kg?1 · min?1, 32.1 (s = 12.1) beats · min?1 and 2.6 (s = 2.0) units, respectively. Comfort scores were higher (better) on average by 1.9 (s = 0.8) units. For the no bumps tests, the only statistically significant difference (P = 0.008) was in [Vdot]O2, which was lower for the hard tail bicycle by 2.2 (s = 1.7) ml · kg?1 · min?1. The results indicate that the full suspension bicycle provides a physiological and psychological advantage over the hard tail bicycle during simulated sub-maximal exercise on bumps. 相似文献
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我国场地短距离自行车女子500m全程竞速能力的训练学特征研究 总被引：2，自引：1，他引：1
以参加“2004年全国自行车锦标赛”女子500m成年组的30名运动员为研究对象,采用分段测试方法,对我国场地短距离自行车女子500m运动员的全程竞速能力进行了划分,全程竞速能力包括:反应能力、加速能力、最高速度能力、相对高速耐力和冲刺能力5个部分。研究发现,加速能力和相对高速耐力是影响我国场地短距离自行车女子500m运动员运动成绩的主要因素。 相似文献
10.
《European Journal of Sport Science》2013,13(1):44-52
AbstractThe effects of saddle height on pedal forces and joint kinetics (e.g. mechanical work) are unclear. Therefore, we assessed the effects of saddle height on pedal forces, joint mechanical work and kinematics in 12 cyclists and 12 triathletes. Four sub-maximal 2-min cycling trials (3.4 W/kg and 90 rpm) were conducted using preferred, low and high saddle heights (±10° knee flexion at 6 o'clock crank position from the individual preferred height) and an advocated optimal saddle height (25° knee flexion at 6 o'clock crank position). Right pedal forces and lower limb kinematics were compared using effect sizes (ES). Increases in saddle height (5% of preferred height, ES=4.6) resulted in large increases in index of effectiveness (7%, ES=1.2) at the optimal compared to the preferred saddle height for cyclists. Greater knee (11–15%, ES=1.6) and smaller hip (6–8%, ES=1.7) angles were observed at the low (cyclists and triathletes) and preferred (triathletes only) saddle heights compared to high and optimal saddle heights. Smaller hip angle (5%, ES=1.0) and greater hip range of motion (9%, ES=1.0) were observed at the preferred saddle height for triathletes compared to cyclists. Changes in saddle height up to 5% of preferred saddle height for cyclists and 7% for triathletes affected hip and knee angles but not joint mechanical work. Cyclists and triathletes would opt for saddle heights <5 and <7%, respectively, within a range of their existing saddle height. 相似文献