Control method for exoskeleton ankle with surface electromyography signals     

张震  王震  蒋佳芯  钱晋武 《上海大学学报(英文版)》2009,13(4):270-273

This paper is concerned with a control method for an exoskeleton ankle with electromyography (EMG) signals. The EMG signals of human ankle and the exoskeleton ankle are introduced. Then a control method is proposed to control the exoskeleton ankle using the EMG signals. The feed-forward neural network model applied here is composed of four layers and uses the back-propagation training algorithm. The output signals from neural network are processed by the wavelet transform. Finally the control orders generated from the output signals are passed to the motor controller and drive the exoskeleton to move. Through experiments, the equality of neural network prediction of ankle movement is evaluated by giving the correlation coefficient. It is shown from the experimental results that the proposed method can accurately control the movement of ankle joint. Project supported by the National High-Tech R&D Program (Grant No.2006AA04Z224), the Innovation Program of Shanghai Municipal Education Commission (Grant No.08ZZ48), and the Shanghai Leading Academic Discipline Project (Grant No.Y0102)  相似文献   

论大学生参加体育运动时踝关节损伤的原因及分析——以华东师范大学为调查个案     

陶志超  董卫亚 《和田师范专科学校学报》2008,28(3):177-178

科学全面的锻炼有助于身心的健康发展,大学生充满活力、渴望运动。因此体育课的课堂教学和课余体育活动不可避免的会造成踝关节运动损伤。针对这种情况,在对我校学生进行随机闯卷调查后,对调查结果进行整理、分析,发现我校很多同学在运动前都存在着准备活动不充分,运动中不注意自我保护的问题,导致在同学中越来越多的出现踝关节扭伤的情况。在了解这一情况后,笔者就踝关节损伤成因进行了探讨,并提出了相关的防范措施。  相似文献   

Test–retest reliability of a new device for assessing ankle joint threshold to detect passive movement in healthy adults     

Wei Sun  Qipeng Song  Bing Yu  Cui Zhang 《Journal of sports sciences》2015,33(16):1667-1674

This study aimed to evaluate the test–retest reliability of a new device for assessing ankle joint kinesthesia. This device could measure the passive motion threshold of four ankle joint movements, namely plantarflexion, dorsiflexion, inversion and eversion. A total of 21 healthy adults, including 13 males and 8 females, participated in the study. Each participant completed two sessions on two separate days with 1-week interval. The sessions were administered by the same experimenter in the same laboratory. At least 12 trials (three successful trials in each of the four directions) were performed in each session. The mean values in each direction were calculated and analysed. The ICC values of test–retest reliability ranged from 0.737 (dorsiflexion) to 0.935 (eversion), whereas the SEM values ranged from 0.21° (plantarflexion) to 0.52° (inversion). The Bland–Altman plots showed that the reliability of plantarflexion–dorsiflexion was better than that of inversion–eversion. The results evaluated the reliability of the new device as fair to excellent. The new device for assessing kinesthesia could be used to examine the ankle joint kinesthesia.  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   

运动性踝关节损伤的预防与治疗对策     

王玮 《考试周刊》2007,(9):107-109

运动性踝关节损伤作为学校体育中的常见伤病,越来越受到广大体育工作者的重视。从踝关节运动损伤的解剖结构及发生原因的角度上,分析研究治疗踝关节运动损伤的方法及其预防措施,以便更好地为体育教学、运动训练、运动卫生提供科学依据。  相似文献   

论“踝角”变化对速滑运动员滑跑速度的影响     

艾东明 《沈阳体育学院学报》2010,29(1):78-80

运用运动力学方法,从解剖学角度对滑行姿势中踝关节最小角度范围进行分析。认为较小的踝关节角度有利于提高蹬冰效果、增大滑行水平速度;并实际分析当前运动员踝角过大的成因,提出具体解决办法,为运动员及教练员重视踝角在滑行技术中的作用提供理论依据。  相似文献   

用阴阳反应法治疗大腿后侧肌肉拉伤之研究     

吴伟奋  刘勇 《福建体育科技》2000,19(5):28-29

大腿后侧肌肉拉伤是体育运动中较为常见的疾病。作者对 113例大腿后侧肌肉拉伤的患者 ,采用阴阳反应法进行治疗观察 ,取得一定的效果  相似文献   

体育教学训练中下胫腓联合损伤的研究及防治     

刘彦林  张仲子  李宏伟 《吉林体育学院学报》2008,24(2):79-80

下胫腓联合是维持踝关节稳定的重要结构,其损伤是一种比较常见的运动损伤,容易造成踝关节慢性不稳定、长期疼痛和创伤性关节炎等后遗症。通过对其解剖结构、功能特点及损伤机制的探讨,总结诊治方法,提出预防措施,以减少运动损伤的发生,提高体育教学训练的质量。  相似文献   

Acute and chronic effects of foam rolling vs eccentric exercise on ROM and force output of the plantar flexors     

Anne A. G. Aune  Chris Bishop  Anthony N. Turner  Kostas Papadopoulos  Sarah Budd  Mark Richardson 《Journal of sports sciences》2019,37(2):138-145

Foam rolling and eccentric exercise interventions have been demonstrated to improve range of motion (ROM). However, these two modalities have not been directly compared. Twenty-three academy soccer players (age: 18 ± 1; height: 1.74 ± 0.08 m; body mass: 69.3 ± 7.5 kg) were randomly allocated to either a foam rolling (FR) or eccentric exercise intervention designed to improve dorsiflexion ROM. Participants performed the intervention daily for a duration of four weeks. Measurements of dorsiflexion ROM, isometric plantar flexion torque and drop jump reactive strength index were taken at baseline (pre-intervention) and at three subsequent time-points (30-min post, 24-hours post and 4-weeks post). A significant time x group interaction effect was observed for dorsiflexion (P = 0.036), but not for torque or reactive strength index. For dorsiflexion, there was a significant increase in both acute (30-min; P < 0.001) and chronic (4-week; P < 0.001) ROM for the eccentric group, whilst FR exhibited only an acute improvement (P < 0.001). Eccentric training would appear a more efficacious modality than foam rolling for improving dorsiflexion ROM in elite academy soccer players.  相似文献   

视觉认知任务介入时踝关节稳定程度对纵跳落地模式影响的研究     

张帆  蒋琴华  林榕  王竹影  吴志建  宋彦李青 《成都体育学院学报》2020,(1):78-85

目的:探讨视觉认知任务介入时不同踝关节稳定程度对纵跳落地姿势稳定策略与神经肌肉控制的影响。方法:36名男性高水平运动员,年龄(20.23±2.05)岁,按照踝关节稳定程度分为健康组(CON)、隐患组(LAT)和不稳定组(CAI),每组12人;随机顺序执行视觉认知任务及高台落地纵跳,并以单因素方差分析和Scheffe法比较各组在落地阶段的运动学、动力学及肌电参数。结果:(1)重心前后移动范围(CAI&LAT>CON)、垂直和整体稳定指数(CON>CAI)差异显著;(2)落地瞬间的踝(CAI>CON)、膝外翻(CON>LAT&CAI)、髋屈曲(CON&LAT>CAI)髋外展(CAI>CON)角度差异显著;下蹲最低点时,踝跖屈角度(CON>LAT&CAI)差异显著,踝屈伸(CON&LAT>CAI)和内外翻(CAI>CON&LAT)活动范围、踝内翻角速度峰值(CAI>CON)显著不同;(3)50 ms落地负荷率(CON>CAI)显著不同;(4)落地前期胫骨前肌(TA:CAI>LAT&CON)、腓骨长肌(PL:CON>CAI)、内侧腓肠肌(MG:CAI>CON)差异显著;落地瞬间股直肌(RF:LAT>CON&CAI)、PL(CON>LAT&CAI)、MG(CAI>CON)显著不同;下蹲期臀中肌(GM:CON>CAI)、PL(CON>LAT&CAI)、MG(CAI>CON)达显著差异,而BF/RF(CON>LAT&CAI)、S/TA(CAI>LAT&CON)、MG/TA(CAI&LAT>CON)共同收缩率差异显著;推蹬期GM(CON>CAI)、股内侧肌(VM:CON>CAI)、股二头肌(BF:CON>LAT&CAI)、比目鱼肌(S:CON>CAI)差异显著,而TA/S(CON>CAI)共同收缩差异显著;稳定期VM(CON>LAT&CAI)、S(CON>CAI)显著不同。结论:髋关节屈曲与外展、较多踝关节外翻与肌肉共同收缩是踝关节不稳定运动员稳定关节的重要机制,而较早且快速的踝关节内翻速度是导致踝关节不稳定运动员反复扭伤的关键因子;可通过强化臀中肌提升髋外展能力,同时训练腓骨长肌以提升踝关节保护的效果。  相似文献