Differences in pedalling technique between road cyclists of different competitive levels     

Juan García-López  Sergio Díez-Leal  Ana Ogueta-Alday  Josu Larrazabal  José A. Rodríguez-Marroyo 《Journal of sports sciences》2016,34(17):1619-1626

The purpose of this study was to compare the pedalling technique in road cyclists of different competitive levels. Eleven professional, thirteen elite and fourteen club cyclists were assessed at the beginning of their competition season. Cyclists’ anthropometric characteristics and bike measurements were recorded. Three sets of pedalling (200, 250 and 300 W) on a cycle ergometer that simulated their habitual cycling posture were performed at a constant cadence (~90 rpm), while kinetic and kinematic variables were registered. The results showed no differences on the main anthropometric variables and bike measurements. Professional cyclists obtained higher positive impulse proportion (1.5–3.3% and P < 0.05), mainly due to a lower resistive torque during the upstroke (15.4–28.7% and P < 0.05). They also showed a higher ankle range of movement (ROM, 1.1–4.0° and P < 0.05). Significant correlations (P < 0.05) were found between the cyclists’ body mass and the kinetic variables of pedalling: positive impulse proportion (r = ?0.59 to ?0.61), minimum (r = ?0.59 to ?0.63) and maximum torques (r = 0.35–0.47). In conclusion, professional cyclists had better pedalling technique than elite and club cyclists, because they opted for enhancing pulling force at the recovery phase to sustain the same power output. This technique depended on cycling experience and level of expertise.  相似文献   

114例颈椎定点复位法加扶阳罐治疗颈椎小关节微错缝的临床观察     

孙大桥  冯高基  王德燕 《湖北体育科技》2016,(5)

目的:探讨颈椎定点复位法加扶阳罐治疗颈椎小关节微错缝的临床疗效。方法:114例患者均采用颈椎定点复位法加扶阳罐治疗。具体分四步。手法定位;松解肌肉;颈椎定点旋转复位;扶阳罐理筋温熨。5次一疗程。若还有症状,休息二天后,重复一疗程。结果:治愈率89.47%,总有效率99.12%。结论:此法可纠正颈椎紊乱的关节,缓解痉挛的肌肉,解除神经、血管的刺激和压迫,改善局部血液循环,使颈椎各关节保持相对的稳定。疗效好,安全易行,值得推广。  相似文献   

女排运动员肩关节损伤原因及其康复训练策略案例研究     

高原 《湖北体育科技》2016,(11):1032-1034

肩伤是专业排球运动员常见的伤病之一,而主攻的肩伤在排球运动的损伤中是最多的。以江苏女排主攻手许若亚为对象,对其在2014年9月17日—2014年10月10日期间,肩关节损伤后的系统性康复训练要素与效果进行研究,总结经验,探索肩关节损伤的有效防治方法,为提高女子排球科医保障水平,指导科学训练提供参考和指导。  相似文献   

Effect of gender on trunk and pelvis control during lateral movements with perturbed landing     

Elmar Weltin  Albert Gollhofer  Guillaume Mornieux 《European Journal of Sport Science》2016,16(2):182-189

In lateral reactive movements, core stability may influence knee and hip joint kinematics and kinetics. Insufficient core stabilisation is discussed as a major risk factor for anterior cruciate ligament (ACL) injuries. Due to the higher probability of ACL injuries in women, this study concentrates on how gender influences trunk, pelvis and leg kinematics during lateral reactive jumps (LRJs). Perturbations were investigated in 12 men and 12 women performing LRJs under three different landing conditions: a movable landing platform was programmed to slide, resist or counteract upon landing. Potential group effects on three-dimensional trunk, pelvic, hip and knee kinematics were analysed for initial contact (IC) and the time of peak pelvic medial tilt (PPT). Regardless of landing conditions, the joint excursions in the entire lower limb joints were gender-specific. Women exhibited higher trunk left axial rotation at PPT (women: 4.0 ± 7.5°, men: ?3.1 ± 8.2°; p = 0.011) and higher hip external rotation at both IC and PPT (p < 0.01). But women demonstrated higher knee abduction compared to men. Men demonstrated more medial pelvic tilt at IC and especially PPT (men: –5.8 ± 4.9°, women: 0.3 ± 6.3°; p = 0.015). Strategies for maintaining trunk, pelvis and lower limb alignment during lateral reactive movements were gender-specific; the trunk and hip rotations displayed by the women were associated with the higher knee abduction amplitudes and therefore might reflect a movement strategy which is associated with higher injury risk. However, training interventions are needed to fully understand how gender-specific core stability strategies are related to performance and knee injury.  相似文献   

体育训练常见急性损伤及其预防     

白晓旭 《黔东南民族师专学报》2005,23(6):42-44

依据对体育训练中常见急性损伤及其防治的调查资料，分析了造成急性损伤的原因，并对预防急性损伤的措施与手段作了的探索，力求减少急性损伤的发生，使体育锻炼更好地起到促进身心健康的作用．  相似文献   

创伤性近侧指间关节屈曲挛缩治疗方法的探讨     

苏峰  张春林  张军威  李国通 《河北北方学院学报(医学版)》2001,(1)

目的:对创伤性近侧指间关节挛缩的发病机制和治疗方法进行探讨。方法:对1995～2000年在我院治疗的创伤性近侧指间关节屈曲挛缩病例进行回顾,指间关节挛缩的发病机制,根据关节内外粘连的不同因素进行松解手术治疗。结果:创伤性近侧指间关节屈曲挛缩的病变可分为关节内粘连、关节外粘连及复合性粘连。经过:(1)单纯松解掌板延长及屈指浅肌腱切断等手术。(2)手术加牵引术,取得了良好结果。平均改善关节活动度达100度(屈)(伸)-10度。结论:(1)创伤性近侧指间关节屈曲挛缩的发生与早期处理不当有关。(2)粘连可以是关节内或关节外因素及复合因素造成。(2)手术治疗配合术后牵引治疗可取得良好的效果。  相似文献   

Collaborative research for sustainable learning: the case of developing innovation capabilities at Volvo Cars   总被引：1，自引：1，他引：0  

Sofia Börjesson 《Action Learning: Research and Practice》2011,8(3):187-209

This paper aims to make a contribution to the stream of literature on action research by describing a longitudinal collaborative research project which evolved out of a long-term, participation partnership with Volvo Cars. The collaboration was aimed at developing innovation capabilities in the company and accumulating knowledge on how capabilities are developed. The paper provides insights into the design of collaborative research projects to enable mutual, sustainable learning. It draws on key notions in the literature on collaborative management research and action learning, highlighting the research design of the project at Volvo Cars and its relations to action learning. The paper describes how the research design opened the way to establishing a learning system at Volvo Cars while simultaneously generating new scientific knowledge within the area of innovation capabilities. The paper provides rich and detailed data on a collaborative research setting and highlights key aspects related to organizing and undertaking collaborative research.  相似文献   

MATLAB语言在教学管理中的应用     

冯烜 《宁波职业技术学院学报》2011,(5):46-48

针对教学管理任务中的批量数据处理和分析报告,采用MATLAB语言和Word文字处理软件联合程序设计的方法,利用动态数据交换技术,实现教学成绩批量处理和自动分析。文中给出了系统工作流程,并在此基础上阐述了程序设计原理,以示例的方式给出了实现方法。  相似文献   

欧洲外语能力评价体系及其对我国外语教学的启示     

翁震华 《当代教育与文化》2016,(3):106-109

欧洲语言能力评价体系以外语学习者的交际语言能力为评价对象,采用“能做”描述,其评价理念和方式对中国传统的外语教学模式和评价方式产生了冲击。以中外联合培养项目的外语教学为例,通过分析欧洲外语评价方式的特点,阐述借鉴欧洲外语能力评价体系改革外语教学可能性。  相似文献   

中外合资经营企业中技术出资的法规问题     

程宗璋 《莆田学院学报》2003,10(1):5-9

依据技术的特性和技术出资的特殊性,指出我国与其相关的法规存在某些缺憾。提出在中外合资经营的企业中,要有对技术出资限围的限定法规条款;并且要用已有的法规对技术出资进行监管;也要注意对第三方即合资企业之债权人的利益保护。  相似文献