Optimizing recovery to support multi-evening cycling competition performance     

Normand A Richard  Michael S Koehle 《European Journal of Sport Science》2019,19(6):811-823

Road criterium and track bicycle racing occur at high speeds, demand repeated high power outputs, last 10–90?min, and offer little chance for recovery after the event. Consecutive evenings of criterium and track racing are respectively known as speed-week or six-day events and take place in evening hours over the course of a week. Given the schedule and timing of these competitions, return to homeostasis can be compromised. No recommendations exist on how to optimize recovery for cyclists participating in these types of repeated evening competitions. Criterium and track cyclists spend considerable time, near and above the individual lactate threshold and therefore mostly utilize carbohydrate as their chief energy substrate. Henceforth, pre – and post-race nutrition and hydration is examined and recommendations are brought forward for carbohydrate, protein, and fluid intake. As evening high-intensity exercise perturbs sleep, strategies to optimize sleep are discussed and recommendations for an optimal sleep environment are given. Active recovery is examined, and the benefits of a short duration low intensity exercise reviewed. Passive recovery methods such as compression garments and cold water immersion are recommended, while evidence for massage, pneumatic compression devices, and neuromuscular electrical stimulation is still lacking. Optimizing recovery strategies will facilitate a return to the resting state following strenuous night competition.  相似文献   

The validity and reliability of a sample of 10 Wattbike cycle ergometers     

Barney Wainwright  Carlton Brian Cooke  John Paul O’Hara 《Journal of sports sciences》2017,35(14):1451-1458

ABSTRACT

The purpose of the study was to assess the validity and inter-bike reliability of 10 Wattbike cycle ergometers, and to assess the test–retest reliability of one Wattbike. Power outputs from 100 to 1000 W were applied using a motorised calibration rig (LODE) at cadences of 70, 90, 110 and 130 rev · min^?1, which created nineteen different intensities for comparison. Significant relationships (P < 0.01, r² = 0.99) were found between each of the Wattbikes and the LODE. Each Wattbike was found to be valid and reliable and had good inter-bike agreement. Within-bike mean differences ranged from 0.0 W to 8.1 W at 300 W and 3.3 W to 19.3 W at 600 W. When taking into account the manufacturers stated measurement error for the LODE (2%), the mean differences were less than 2%. Comparisons between Wattbikes at each of the nineteen intensities gave differences from 0.6 to 25.5 W at intensities of 152 W and 983 W, respectively. There was no significant difference (P > 0.05) between the measures of power recorded in the test–retest condition. The data suggest that the Wattbike is an accurate and reliable tool for training and performance assessments, with data between Wattbikes being able to be used interchangeably.  相似文献   

Bicycle rider control skills: expertise and assessment     

Borut Fonda  Nejc Sarabon 《Journal of sports sciences》2017,35(14):1383-1391

Abstract

Research on how human balance and control bicycles are inconclusive, largely due to the small number of participants in the previous studies. Therefore, the aim of this study was to test the hypotheses that 1) cycling lateral deviation amplitude will reliably show differences between more and less experienced cyclists and 2) more experienced will exhibit slower and smaller steering motions compared to the less experienced cyclists. Twenty-eight experienced and inexperienced cyclists rode a bicycle in a straight line. Lateral deviation, steering and roll were measured. Intersession reliability of the deviation was high with Cronbach’s alpha values higher than 0.75. The amplitude, variability and rate of steering and roll parameters showed statistically significant differences between the groups. The test used in this study is sensitive to detect differences between more and less experienced cyclists and can be used for further research that aims to test the effect of a specific intervention addressing rider control. We also showed that steering and roll angle, which were described before as two of the main motor control actions in bicycle control, differ in the variability, amplitude and rate between more and less experienced cyclists. The results of the present study have practical implications for improving bicycle rider control and increasing the safety of cyclists.  相似文献   

山地自行车运动员的力量训练   总被引：1，自引：0，他引：1  

刘宏 《安徽体育科技》2010,31(5):42-44

山地自行车运动员的力量素质对运动成绩有极大影响,通过对运动员一般力量、专项力量、核心力量训练的分析,来探讨如何提升山地自行车运动员的力量训练。  相似文献   

我国普通高校武术教学改革的困境与对策研究     

孙宝红 《搏击·武术科学》2010,(8):59-60

文章通过对我国普通高校武术教学的现状进行分析,指出武术教学改革的必要性及面临的困境,在此基础上以＂以人为本,淡化套路,突出方法,强调应用＂为指导思想,从课程目标、教学内容、教学方法等方面对武术教学改革提出相应的对策与建议。  相似文献   

华北平原施氮对农田土壤溶液中硝态氮含量的影响   总被引：13，自引：0，他引：13  

胡春胜程一松  于贵瑞 《资源科学》2001,23(6):46-48

该文通过采集土壤溶液并测定其硝态氮（N03ˉ-N),对不同施N处理下40cm-220cm土层的N03ˉ-N累积特征进行了研究。结果表明，太行山前平原褐土农田80cm和140cm-160cm处土层为N03ˉ-N浓度显著增加；200kg.hm-2的氮肥施入水平，2m-2.2m土层中土壤溶液中硝态氮浓度呈持续增长，且增加量主要发生在7月-9月份玉米生育期。  相似文献   

降低循环水场循环水浊度新方法探究   总被引：1，自引：0，他引：1  

吕雯静  陈贺 《兰州石化职业技术学院学报》2011,11(3):13-15

针对循环水浊度偏高问题,分析造成悬浮物、浊度升高的原因,通过增加隔油池排泥反洗实验,探究降低循环水浊度的新方法,评价排泥反洗中试装置中,浅层压力式过滤罐与滤池降低浊度的效果对比,在加药和不加药两种情况下,浊度和去除率的情况。  相似文献   

不同专项训练对男子短距离自行车运动员无氧能力的影响   总被引：2，自引：2，他引：0  

马国强  李之俊  刘茂  严金慧 《体育科研》2007,28(1):71-74

分析两个阶段不同侧重的专项训练前后男子短距离自行车运动员无氧功和专项成绩的变化,探讨不同专项训练对无氧能力的影响,为合理安排训练计划、评价训练效果提供依据。在冬训期间,对运动员的15s、30s无氧功和场地专项成绩测试结果显示,专项力量训练提高了运动员的磷酸原供能能力,但8周训练时间过长,造成了专项频率水平的降低,影响了成绩。专项频率训练虽然使无氧能力小幅下降,但对运动员骑行频率的改善从整体上提高了短距离运动员的专项成绩。在训练计划的制定中,应合理安排各种专项训练手段的比例。  相似文献   

SRM系统在短距离自行车专项能力测试与评定中的应用研究   总被引：6，自引：6，他引：0  

李之俊  马国强  苟波 《体育科研》2007,28(4):55-58

应用场地SRM系统对上海自行车队重点队员6人的场地专项训练分阶段进行跟踪测试,以便筛选有效指标评价短距离自行车主要专项能力。结果表明,在短距离自行车爆发力评价中,最大功率和平均功率、最大频率和平均频率是反映运动能力的有效指标;平均功率和平均频率是反映力量耐力的有效指标;在对短距离自行车专项最大速度的评价中,最大频率和平均频率是反应运动能力的有效指标;而平均频率是反映高速耐力的有效指标。  相似文献   

不同强度骑车和跑步的能量消耗与底物代谢特征研究   总被引：4，自引：2，他引：2  

张勇  王恬 《中国体育科技》2009,45(1)

目的:研究比较不同强度骑车和跑步的能量消耗与底物代谢特征。方法:10名普通女大学生分别以45%、55%、65%、75%.VO2max强度进行骑车和跑步运动,采用气体代谢法测定机体的能量代谢状况。结果:1)骑车时,脂肪的消耗量和供能量在55%V.O2max强度达到最高,分别为4.26mg/min/kg和38.38cal/min/kg。跑步运动时,脂肪的消耗量和供能量在55%V.O2max强度达到最高,分别为6.41mg/min/kg和57.65cal/min/kg;2)在45%、55%、65%、75%V.O2max强度,跑步脂肪氧化量、总供能量、脂肪供能比例均高于骑车;而跑步的糖消耗量和呼吸交换率低于骑车。结论:1)无论骑车还是跑步,在45%、55%、65%、75%V.O2max4个运动强度中,55%V.O2max强度运动时的脂肪的氧化和供能量最大;2)在相同运动强度(%V.O2max)下,跑步总能量消耗、脂肪消耗和脂肪供能比例高于骑车,糖的消耗低于骑车。  相似文献