Validation of the Microsoft Kinect® camera system for measurement of lower extremity jump landing and squatting kinematics     

Moataz Eltoukhy  Adam Kelly  Chang-Young Kim  Hyung-Pil Jun  Richard Campbell 《Sports biomechanics / International Society of Biomechanics in Sports》2016,15(1):89-102

Cost effective, quantifiable assessment of lower extremity movement represents potential improvement over standard tools for evaluation of injury risk. Ten healthy participants completed three trials of a drop jump, overhead squat, and single leg squat task. Peak hip and knee kinematics were assessed using an 8 camera BTS Smart 7000DX motion analysis system and the Microsoft Kinect® camera system. The agreement and consistency between both uncorrected and correct Kinect kinematic variables and the BTS camera system were assessed using interclass correlations coefficients. Peak sagittal plane kinematics measured using the Microsoft Kinect® camera system explained a significant amount of variance [Range_hip = 43.5–62.8%; Range_knee = 67.5–89.6%] in peak kinematics measured using the BTS camera system. Across tasks, peak knee flexion angle and peak hip flexion were found to be consistent and in agreement when the Microsoft Kinect® camera system was directly compared to the BTS camera system but these values were improved following application of a corrective factor. The Microsoft Kinect® may not be an appropriate surrogate for traditional motion analysis technology, but it may have potential applications as a real-time feedback tool in pathological or high injury risk populations.  相似文献   

Ankle and knee kinetics between strike patterns at common training speeds in competitive male runners     

Daniel Kuhman  Daniel Melcher 《European Journal of Sport Science》2016,16(4):433-440

The purpose of this study was to investigate the interaction of foot strike and common speeds on sagittal plane ankle and knee joint kinetics in competitive rear foot strike (RFS) runners when running with a RFS pattern and an imposed forefoot strike (FFS) pattern. Sixteen competitive habitual male RFS runners ran at two different speeds (i.e. 8 and 6?min?mile^?1) using their habitual RFS and an imposed FFS pattern. A repeated measures analysis of variance was used to assess a potential interaction between strike pattern and speed for selected ground reaction force (GRF) variables and, sagittal plane ankle and knee kinematic and kinetic variables. No foot strike and speed interaction was observed for any of the kinetic variables. Habitual RFS yielded a greater loading rate of the vertical GRF, peak ankle dorsiflexor moment, peak knee extensor moment, peak knee eccentric extensor power, peak dorsiflexion and sagittal plane knee range of motion compared to imposed FFS. Imposed FFS yielded greater maximum vertical GRF, peak ankle plantarflexor moment, peak ankle eccentric plantarflexor power and sagittal plane ankle ROM compared to habitual RFS. Consistent with previous literature, imposed FFS in habitual RFS reduces eccentric knee extensor and ankle dorsiflexor involvement but produce greater eccentric ankle plantarflexor action compared to RFS. These acute differences between strike patterns were independent of running speeds equivalent to typical easy and hard training runs in competitive male runners. Current findings along with previous literature suggest differences in lower extremity kinetics between habitual RFS and imposed FFS running are consistent among a variety of runner populations.  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   

我国高等农业院校体育竞赛体制改革的思考     

卓美英  郭孝平 《宁德师专学报(自然科学版)》2006,18(1):62-63,66

合理的体育竞赛体制不仅有利于推动体育运动的普及和提高，而且能充分调动人们参与体育竞赛的积极性．从目前全国高等农业院校体育竞赛情况来看，存在比赛制度不规范、项目设置单一、运动员级别分组模糊等一系列的局限性．因此，有必要对其竞赛的比赛制度、项目设置等诸方面进行相应改革．  相似文献   

论运动技能形成和竞技成绩的起伏与高原现象--用正确理念评价我国乒乓球运动员技术水平与竞技成绩     

刘维芳 《江西教育学院学报》2004,25(3):55-57

任何运动技能训练或运动成绩与时间周期,大多呈S型或波浪式曲线,时而上升,时而下降,这是符合运动技能形成过程的普遍规律。只有科学地运用这一理念,才能成功地指导我国乒乓球运动训练与比赛。我国乒乓球队之所以长盛不衰,正是充分地掌握这一客观规律,致使我国乒乓球事业处于主导地位,捍卫了国球的荣誉。  相似文献   

我国中小城市体育竞赛发展现状研究   总被引：2，自引：0，他引：2  

钱文军 《三门峡职业技术学院学报》2003,2(2):56-58

通过对我国中小城市体育竞赛发展现状的研究,认为中小城市体育竞赛已初步形成完善的竞赛体系,竞赛的多元功能和整体效益明显增强,体育竞赛的改革初见成效,针对竞赛中存在的问题,明确地提出了中小城市体育竞赛发展的指导思想、目标和对策。  相似文献   

高师院校学生课外体育锻炼现状的调查分析     

张丽玉  钟庆春 《嘉应学院学报》2002,20(6):114-117

运用文献资料研究法、问卷调查法、数理统计法,对韩山师范学院普通专业学生参加课外体育锻炼的现状进行调查分析,旨在了解学生参与课外体育锻炼的现状与存在问题,并提出改革的措施。  相似文献   

健美操运动损伤之初探   总被引：2，自引：0，他引：2  

黄艳红 《株洲师范高等专科学校学报》2002,7(5):43-45

近年来，我国健美操运动如雨后春笋迅速发展，但起步较晚，又受物质条件及其科研工作滞后等因素影响；训练中常出现各种损伤，影响了运动技术水平的提高和受训学生的身心健康，通过对武汉体院122名健美操专选班学生参加健美操训练的调查，探索研究了健美操运动损伤规律及预防措施，为受训学生创造最佳成绩，最大限度延长其运动年限，减少伤病事故发生，以及为体育院校顺利完成健美操专业训练课程及其选修课程提供参考依据。  相似文献   

运动损伤的机体康复与心理恢复   总被引：1，自引：0，他引：1  

张镇 《齐齐哈尔师范高等专科学校学报》2002,21(3):66-68

运动损伤在体育教学和训练中经常发生，本就如何科学的进行机体康复和心理恢复进行了描述，旨在使伤早日康复。  相似文献   

女大学生体育运动态度的调查研究     

黄胜  刘雪勇 《怀化学院学报》2001,20(2):91-92

从态度的三个层面：认知层面、情感层面、行为层面对师专女大学生体育运动的态度进行研究分析．结果表明，就整体而言师专女大学生对体育运动的认识处于较低水平．她们特别重视自身参加锻炼的情感体验，对体育运动的行为倾向处于一般水平，  相似文献