Comparison of lower limb muscle architecture and geometry in distance runners with rearfoot and forefoot strike pattern     

Joseph M. Gonzales  Andrew J. Galpin  Melissa M. Montgomery 《Journal of sports sciences》2013,31(19):2184-2190

ABSTRACT

We examined the association between footfall pattern and characteristics of lower limb muscle function and compared lower limb muscle function between forefoot and rearfoot runners. Fifteen rearfoot and 16 forefoot runners were evaluated using ultrasonography of the gastrocnemii and tibialis anterior while strike index and heel strike angle quantified footfall pattern. Higher strike index was associated with lower medial gastrocnemius echo intensity (p = 0.05), lower lateral gastrocnemius echo intensity (p = 0.04), smaller tibialis anterior pennation angle (p = 0.05), and longer lateral gastrocnemius fascicle length (p = 0.04). Larger heel strike angle was associated with smaller medial gastrocnemius cross-sectional area (p = 0.04), shorter lateral gastrocnemius fascicle length (p < 0.01), and lower plantar flexion moment (p < 0.01). Larger plantar flexion moment was associated with lesser medial gastrocnemius echo intensity (p = 0.04), lesser lateral gastrocnemius echo intensity (p = 0.03), and greater lateral gastrocnemius fascicle length (p = 0.02). A smaller plantar flexion moment, larger heel strike angle, lower tibialis anterior echo intensity, larger tibialis anterior pennation angle, and smaller lateral gastrocnemius pennation angle were observed in rearfoot compared to forefoot runners (p < 0.05). Lower limb muscle architecture is associated with footfall pattern and ankle mechanics during running.

Abbreviation: EMG: electromyographic; MG: medial gastrocnemius; LG: lateral gastrocnemius; TA: tibialis anterior; EI: echo intensity; CSA: cross-sectional area; PA: pennation angle; FL: fascicle length; FT: fat thickness  相似文献   

Biomechanical risk factors of non-contact ACL injuries: A stochastic biomechanical modeling study     

Cheng-Feng Lin  Hui Liu  Michael T. Gros  Paul Weinhold  William E. Garrett  Bing Yu 《运动与健康科学(英文)》2012,1(1):36-42

  相似文献   

骨形态发生蛋白对膝内侧副韧带止点愈合影响的实验研究   总被引：7，自引：0，他引：7  

王健全  田得祥  余家阔 《体育科学》2001,21(3):55-58,70

为了了解骨形态发生蛋白(BMP)在关节韧带愈合中的作用,将8只普通家兔随机分为两组,采取自体对照的方法,手术制作膝内侧副韧带上止点断裂后原位修复模型,将部分纯化的牛骨形态发生蛋白植入韧带上止点周围,对侧植入牛血清白蛋白(BSA)作为对照.结果发现BMP侧韧带止点周围结缔组织和骨增生明显,在30 d组BMP侧止点周围新生骨量较BSA侧明显增多(P《0.01),并在韧带与骨之间出现类似末端结构样连接.因此本研究认为BMP能够通过诱导新骨生成和促进纤维结缔组织的生成来促进韧带与骨之间的早期牢固愈合.  相似文献   

中部1/3髌韧带切除后其修复过程中的钙化现象     

蔡冬青  陈启明  李嘉豪  邓美娟 《体育科学》1999,(2):68-71

在对实验性切除中部1/3髌韧带后,剩余部分髌韧带修复过程进行有关研究时,发现在术后的3至9个月,已修复的伤口区中央出现一些类似骨样的细胞和结构。通过进行茜素红染色和对骨形成蛋白-4(BMP-4)基因表达进行原位杂交研究。我们认为:这是一种钙化现象,属不良修复的可能性大,而非是自然修复的一个过程。钙化现象可能是导致韧带损伤修复后功能不能恢复正常的原因之一。同时我们还发现 BMP-4 基因在那些类似骨细胞样的过渡型的间充质细胞中存在着表达,提示:BMP-4 基因在髌韧带修复过程中会起着一定的作用,可能也在钙化现象的发生当中担当一定的角色。  相似文献   

Effects of treadmill versus overground soccer match simulations on biomechanical markers of anterior cruciate ligament injury risk in side cutting     

R. M. Firhad Raja Azidin  Sean Sankey  Barry Drust  Mark A. Robinson 《Journal of sports sciences》2015,33(13):1332-1341

This study aimed to investigate whether treadmill versus overground soccer match simulations have similar effects on knee joint mechanics during side cutting. Nineteen male recreational soccer players completed a 45-min treadmill and overground match simulation. Heart rate (HR) and rating of perceived exertion (RPE) were recorded every 5 min. Prior to exercise (time 0 min), at “half-time” (time 45 min) and 15 min post-exercise (time 60 min), participants performed five trials of 45° side-cutting manoeuvres. Knee abduction moments and knee extension angles were analysed using two-way repeated measures analysis of variance (α = 0.05). Physiological responses were significantly greater during the overground (HR 160 ± 7 beats ? min^?1; RPE 15 ± 2) than the treadmill simulation (HR 142 ± 5 beats ? min^?1; RPE 12 ± 2). Knee extension angles significantly increased over time and were more extended at time 60 min compared with time 0 min and time 45 min. No significant differences in knee abduction moments were observed. Although knee abduction moments were not altered over time during both simulations, passive rest during half-time induced changes in knee angles that may have implications for anterior cruciate ligament injury risk.  相似文献   

体育教学训练中踝关节韧带损伤及防治   总被引：2，自引：0，他引：2  

林仁鸿 《宁德师专学报(自然科学版)》2003,15(1):33-35

踝关节是运动的重要而又薄弱的部位,它的负荷量最大,跑跳是所有运动中不可缺少的动作.踝关节韧带损伤的突发性,难以预防,易使人在极短时间以内突然降低或失去运动能力.它在体育教学、训练时尤为多见.通过对踝关节韧带损伤机制的探讨,提出防治方法,以减少运动损伤的发生,保证教学训练正常进行,提高体育教学训练的质量.  相似文献   

跌打丸外敷配合频谱仪与抗炎止痛药治疗棘上韧带损伤的对比研究     

陈昱  任秀琪 《西安文理学院学报》2008,11(1):117-119

比较了跌打丸外敷配合频谱仪与抗炎止痛药治疗棘上韧带损伤的临床效果．将48例棘上韧带损伤患者随机分为两组,一组采用跌打丸外敷配合频谱仪治疗（n=28）,另一组口服抗炎止痛药物治疗,结果显示跌打丸外敷配合频谱仪治疗组总有效率为96．4％％,优良率为85．7％,且没有明显副作用;而抗炎止痛组总有效率为45％,优良率仅为20％（P〈0．01）,表明跌打丸外敷配合频谱仪治疗棘上韧带损伤明显优于抗炎止痛药物．  相似文献   

Angle-specific knee muscle torques of ACL-reconstructed subjects and determinants of functional tests after reconstruction     

Özge Çınar-Medeni  Gulcan Harput  Gul Baltaci 《Journal of sports sciences》2019,37(6):671-676

The purposes of this study were to analyse (a) if “angle-specific” (AS) flexor and extensor torques were different between ACL-reconstructed and uninvolved limbs, (b) the difference in peak torque occurrence angles for concentric and eccentric knee flexor and extensor torques between involved and uninvolved limbs and (c) if AS concentric and eccentric knee flexor and extensor torques are determinants of performance in the “single-leg hop test” (SLHT) and “vertical jump and reach test” (VJRT) in ACL-reconstructed legs. Twenty-seven male ACL-reconstructed volunteers were included in the study. Isokinetic knee muscle strength, SLHT and VJRT were performed 6 months after ACL reconstruction. No difference was found in extremity and knee joint angle interaction for concentric and eccentric flexor and extensor torques (p > 0.05). Peak torque occurrence angles were not different between involved and uninvolved limbs (p > 0.05). In involved extremities, concentric knee extensor strength at 90° was a determinant of SLHT performance (R² = 0.403, p < 0.05), and concentric knee extensor strength at 60° was a determinant of VJRT (R² = 0.224, p < 0.05). Assessment of AS concentric knee extensor strength at 60° and 90° might be important, because these were determinants of functional test performance.  相似文献   

3D打印技术在膝前交叉韧带重建中的应用          下载免费PDF全文

罗树林  黄雨亭  戴工华  马敏  蔡俊丰  曾文  尹峰 《体育科研》2019,(1):86-89

目的：探讨3D打印技术对关节镜前交叉韧带重建手术的辅助价值。方法：对2017年12月-2018年5月收治的15例因运动损伤导致前交叉韧带断裂且需进行韧带重建的患者,术前进行膝关节CT扫描,Mimcs图像处理,通过3D打印膝关节模型,进行模型上股骨骨隧道定位,并进行预手术,测量隧道长度,术前及术后6个月进行膝关节Lysholm 评分以评估膝关节功能。结果：通过3D打印模型预手术,均较准确地定位了前交叉韧带股骨止点,预手术测量股骨骨隧道平均长度为（43.2±2.13） mm,术中测量（43.7±1.75） mm,术后再次CT测量骨隧道长度为（42.4±3.25） mm,差异无显著性意义（P>0.05）,术前Lysholm评分（46.2±5.73） 分,术后Lysholm 评分（88.4±6.25） 分,差异有显著性意义（P＜0.05）。结论：3D打印模型预手术可以辅助关节镜术中较快速、准确地定位前交叉韧带股骨止点,模型与实体骨隧道契合度高,术后疗效优良。  相似文献   

不同保守疗法治疗运动员膝关节内侧副韧带损伤的疗效对比分析     

张庆久 《辽宁体育科技》2021,(3):63-66

目的:对比不同保守疗法治疗运动员膝关节内侧副韧带(MCL)损伤的临床疗效。方法:2018年6月至2022年12月期间膝关节MCL损伤的运动员共72例,随机分为电针+推拿组(对照组)、电针+推拿+康复训练组(实验组),每组36人,进行为期4周的治疗。采用疼痛视觉模拟评分(VAS).Lysholm膝关节功能评分,对不同组的运动员治疗前后的疼痛、膝关节功能进行评定,并进行临床疗效评估。结果:对照组和实验组治疗后的有效率分别为76%和94%,VAS评分均显著降低(P<0.45),Lysholm评分均显著增加(P<0.05);治疗后,实验组的VAS评分.Lysholm评分均优于对照组,且差异显著(P<0.05)。结论:电针结合推拿和康复训练治疗运动员膝关节MCL损伤的疗效要优于电针结合推拿治疗方法,能够明显改善患者膝关节周围疼痛及膝关节整体功能。  相似文献