带测速功能的转髋核心力量训练装置研制

研制一种带有测速功能、振动上固定转髋的核心力量训练装置。该仪器由底座、平衡座、两组振动支撑杆和量化监控组件等部分组成。仪器研发以运动员核心稳定力量训练和运动技能形成的机制为原理,目的在于提高运动员髋部转体动作中机体各运动单元的协调工作能力,发展机体核心区域的主动肌群与被动肌群,改善运动员对核心肌群的控制能力。将训练过程进行量化和定性的数字化测量,以有效的科学监控实现训练可控化。

对竞走转髋技术的探讨

竞走的转髋从原来的左右转动，到现在以垂直轴为主的转动，是当前发展潮流．

乒乓球弧圈球技术中“转髋”动作的生物力学分析

运用生物力学原理对弧圈球技术中的“转髋”动作加以分析 ,证实“转髋”动作能够提高挥拍角速度和线速度。阐明了“转髋”动作在弧圈球技术中的重要意义 。

转髋交叉跑在短跑训练中的应用实验

在转髋交叉跑训练过程中,运动员需保持训练动作的正确性与一致性,以提高运动员上臂前后摆动的一致性与协调性,运动员两腿摆动动作的准确性,以训练运动员腿部的肌群,提高运动员的短跑训练成绩。本文通过对转髋交叉跑在短跑训练中的实验进行探讨,证实转髋交叉跑能够大大提高运动员的短跑训练成绩。

“髋交叉跑”成绩与跑类项目成绩的相关性分析

田径训练过程中,核心区域的训练越来越得到广大教练员的重视。本研究根据对天津体育学院田径运动员进行的专门实验,指出了一种常见而又易被大家忽略的训练方法——髋交叉跑,这种训练方法虽然很常见,但没有引起广大教练员的足够重视。通过这项研究探讨髋交叉跑与跑类成绩的相关性分析。研究视角创新,本研究基于髋的解剖学位置,从功能性体能的角度和跑的技术的本质角度,来重新定位髋在跑的项目中的价值,进而更为清晰的认识并定位髋交叉跑在跑类项目训练中的价值;研究理念创新,髋交叉跑是一种大家都很熟悉但没有引起足够重视的的训练手段,通常只是作为一种准备活动的手段来进行练习。而本研究认为,髋交叉跑的竞技性功能被忽略了。我们对髋交叉跑的技术规格和速度提出更高的要求之后,髋交叉跑的专项训练功能性就可以较好的体现出来。本研究以天津体育学院径赛专项的一一级、一二级、一三级同学为研究标本,根据对其测试不同距离的髋关节相应动作所用的时间,旨在论证转髋交叉跑对速度性项群各项目的影响,从而得出结论:不同距离的转髋运动对不同专项运动员的影响不同,三十米转髋交叉跑与径赛运动员的运动成绩呈强相关,六十米转髋交叉运动与径赛运动员的运动成绩呈极强相关,但两者均随距离的延长而导致相关系数的降低。

推铅球最后用力的髋关节技术分析

本文根据髋关节的解剖结构,说明推铅球最后用力应从其发力,并要正确处理髋部与身体其它部位的协调用力。在训练中应注意强化髋部能力与技术的同步训练。其目的是使运动员更合理有效的发挥整体力量,创造优异成绩。

侧向滑步推铅球易犯错误及纠正方法

论滑步推铅球在教学中针对学生在掌握技术上易犯错误 ,教师应采取相应的有效措施 ,及时纠正 ,使学生快速掌握正确技术 ,提高教学质量 。

培养学生体育创新意识与能力的几点思考

如何在体育教学中激发和培养学生的创新意识与能力，是每个体育教学工作者需要不断探索的难题。传统体育教学往往是以教师为中心，这样培养出来的学生思想僵化，缺乏创造力，已不能符合时代对人才的要求。因此，体育教师应充分发挥体育教学的特点和优势，结合新课程标准，在体育教学中充分激发和培养学生的创新意识与能力。那么，怎样才能在体育课中培养学生的创新意识与能力呢？反思多年的新课程改革实践，总结教学经验，笔者认为课堂教学中可以从以下几个方面入手。

The use of the greater trochanter marker in the thigh segment model:Implications for hip and knee frontal and transverse plane motion

Background:The greater trochanter marker is commonly used in 3-dimensional(3D) models;however,its influence on hip and knee kinematics during gait is unclear.Understanding the influence of the greater trochanter marker is important when quantifying frontal and transverse plane hip and knee kinematics,parameters which are particularly relevant to investigate in individuals with conditions such as patellofemoral pain,knee osteoarthritis,anterior cruciate ligament(ACL) injury,and hip pain.The aim of this study was to evaluate the effect of including the greater trochanter in the construction of the thigh segment on hip and knee kinematics during gait.Methods:3D kinematics were collected in 19 healthy subjects during walking using a surface marker system.Hip and knee angles were compared across two thigh segment definitions(with and without greater trochanter) at two time points during stance:peak knee flexion(PKF) and minimum knee flexion(Min KF).Results:Hip and knee angles differed in magnitude and direction in the transverse plane at both time points.In the thigh model with the greater trochanter the hip was more externally rotated than in the thigh model without the greater trochanter(PKF:-9.34°± 5.21° vs.1.40°± 5.22°,Min KF:-5.68°± 4.24° vs.5.01°± 4.86°;p < 0.001).In the thigh model with the greater trochanter,the knee angle was more internally rotated compared to the knee angle calculated using the thigh definition without the greater trochanter(PKF:14.67°± 6.78° vs.4.33°± 4.18°,Min KF:10.54°± 6.71° vs.-0.01°± 2.69°;p < 0.001).Small but significant differences were detected in the sagittal and frontal plane angles at both time points(p < 0.001).Conclusion:Hip and knee kinematics differed across different segment definitions including or excluding the greater trochanter marker,especially in the transverse plane.Therefore when considering whether to include the greater trochanter in the thigh segment model when using a surface markers to calculate 3D kinematics for movement assessment,it is important to have a clear understanding of the effect of different marker sets and segment models in use.

屈膝蹬地有讲究

正手击球的发力主要依靠屈膝蹬地转髋转肩。在日常的多球训练中，教练经常强调击球过程中的屈膝蹬地。正手击球时为何要屈膝蹬地呢？张坤教练对此做了详细的剖析。

爬泳技术八原则

2001年,美国游泳教练员协会在新奥尔良举办了世界游泳教练员讲习班。福布斯·卡莱尔在讲习班上播放了他录制的一套名为《爬泳技术的发展》录像片。在这部录像片中,卡莱尔介绍了游好爬泳应注意的8原则。本刊现将这8条原则和参考译文同时刊出,以飨读者。如读者对这8条原则有更好的译法,请将译文寄我刊,我刊将选登来稿,以便更准确地理解卡莱尔的8原则。

Treatment of comminuted trochanteric fractures and non-union of trochanteric osteotomy in revision total hip arthroplasty

Objective: To explore the clinical efficacy of the treatment of comminuted trochanteric fractures and trochanteric osteotomy non union in revision total hip arthroplasty with tension band fixation. Methods: A retrospective review of 295 revision total hip operations performed between 1992 and 1998 was undertaken. Twenty hips of 19 patients with comminuted fractures or nonunion of the greater trochanter were stabilized with tension band technique. Multiple 2.0 mm k wires and tension band wires were placed through the intact cortex distally and the abductor tendon proximally in the pattern "8". Results: The average follow up was 30 months. The Harris Hip Score improved on average from 45 preoperatively to 89 at follow up. Sixteen hips with intra operative trochanteric fracture through osteolytic bone and four hips with symptomatic trochanteric nonunion were approached with tension band fixation. Perioperative loss of fixation in one patient required a repeated surgery. The same fixation at the second operation achieved an uneventful healing. Two patients had a 2 cm proximal migration of one K wire without loss of bony fixation. The trochanteric fractures healed with no further proximal wire migration. One patient had loss of fixation with trochanteric escape at 6 weeks post operatively. The patient has abductor weakness with Trendleburg limp but without pain. On average, radiographic examination showed that healing occurred at 16.6 weeks postoperatively. Six patients developed grade 1 heterotopic ossification and two patients grade 3. All were asymptomatic. None of the 19 patients experienced a dislocation during the follow up. Conclusions: Tension band fixation for greater trochanter can enhance the success rate of revision total hip arthroplasty without a deficient abductor mechanism.