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对大学生不良步态生物力学特征及影响因素进行研究，为揭示在校大学生群体步态特点，探讨内八步态形成的生物力学因素及机制，和防治内八步态及其他不良步态的相关研究提供理论依据。结果显示：(1)大学生的步向角度为(7.5±8.4)°，内八步态发生率为28%，外八步态发生率为27%；步态特点性别差异非常显著，主要表现在步向角均值、内外八步发生率及左右不对称比例。(2)着地时相，正常步态足底压力中心速率最大，内...
探讨太极拳和广场舞对中老年女性静态平衡功能的影响以及两者在提高平衡功能方面的优劣。选取90名右足为优势足的中老年女性为研究对象，其中太极拳组30人、广场舞组30人、对照组30人。采用平衡测试仪分别测试双足闭眼、左足睁眼和右足睁眼状态下各平衡指标值，单、双足的测试时间均为10 s。结果发现：太极拳组和广场舞组各平衡指标均非常显著小于对照组(P<0.01)；太极拳组多数平衡指标显著小于广场舞组(P<0...
高弓足跑步支撑阶段的动力学特征
运动生物力学 高弓足 支撑阶段 载荷率
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2017/8/15
根据足弓高度指数选取9名高弓足学生为实验组和9名正常足学生为对照组，采用KISTLER三维测力台对两组受试者跑步时支撑阶段的力学控制特征进行分析。研究结果发现：1)垂直方向上，高弓足者着地时的冲击力峰值和第1载荷率显著高于正常足者(P﹤0.05)；推动力峰值和第2载荷率以及到达峰值的时间两组间差异无统计学意义(P﹥0.05)。2)前后方向上，高弓足者加速力峰值高于正常足者(P﹤0.05)，其它指标...
躯干不同负重方式对人体步行的生物力学影响
运动生物力学 负重方式 步行 躯干
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2017/8/15
研究躯干采用不同负重方式时人体行走的步态特征，探讨躯干不同负重方式对步态的影响，为日常行走的负重方式的选择或仿生机器人的设计提供参考。选用10名普通男性大学生为受试者，佩戴特制负重架，分别进行躯干基础负重、躯干前负重和躯干后负重3种状态下的行走，采用Kistler三维测力台、Motion红外高速运动捕捉系统同步采集运动学、动力学数据。结果显示，在行走过程中与后负重相比，前负重显著增加了步宽、重心的...
1JHL-2型秸秆深埋还田机设计与试验
秸秆深埋还田 合理耕层 螺旋开沟器 运动学分析
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2017/11/21
为了改善土壤耕层结构，协调土壤水、肥、气矛盾，有机养分消耗与积累矛盾，实现秸秆深埋还田，研制了1JHL-2型秸秆深埋还田机，主要由秸秆粉碎装置、螺旋开沟装置、输送装置、落料装置和覆土装置等组成。该机具收集两垄秸秆埋于一条垄沟，可实现秸秆垄沟隔行交替深埋，一次完成秸秆粉碎、收集、开沟、深埋、镇压等多项作业，适用于东北平原中南部棕壤土区合理耕层构建的秸秆深埋还田的技术要求。通过对秸秆在输送装置上的斜抛...
Active Workstations Do Not Impair Executive Function in Young and Middle-Age Adults
COGNITIVE CONTROL TREADMILL DESK PHYSICAL ACTIVITY SITTING SEDENTARY BEHAVIOR COGNITION
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2018/4/24
Purpose This study aimed to examine the effects of self-selected low-intensity walking on an active workstation on executive functions (EF) in young and middle-age adults.
Methods Using a within-subj...
Coronary Artery Evaluation by Screening Echocardiogram in Intercollegiate Athletes
PREPARTICIPATION SCREENING CORONARY ARTERY ANOMALY SUDDEN CARDIAC DEATH SPORTS CARDIOLOGY
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2018/4/24
Introduction Coronary artery anomalies are the second most common congenital cause of sudden cardiac death in young athletes. Some centers have advocated for limited transthoracic echocardiogram (TTE)...
Gross Motor Skills and Cardiometabolic Risk in Children: A Mediation Analysis
CHILDREN HEALTH LOCOMOTOR SKILLS METABOLIC SYNDROME
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2018/4/24
Purpose The purpose of this study was to examine the linear relationship between gross motor skills and cardiometabolic risk, with aerobic fitness as a mediator variable, in low-income children from t...
2017运动和收缩系统高登研究研讨会（The Gordon Research Seminar on Motile & Contractile Systems）
2017 运动 收缩系统高登 研究研讨会
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2017/3/17
Applications for this meeting must be submitted by July 1, 2017. Please apply early, as some meetings become oversubscribed (full) before this deadline. If the meeting is oversubscribed, it will be st...
Changes in Gait over a 30-min Walking Session in Obese Females
TREADMILL OBESITY WEIGHT LOSS BIOMECHANICS WOMEN FATIGUE
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2018/4/24
Purpose This study assessed the biomechanical gait changes in obese and normal-weight female adult subjects after a commonly recommended 30-min walking session. Hip and knee adduction and extensor mom...
Effect of Dry Needling on Thigh Muscle Strength and Hip Flexion in Elite Soccer Players
DRY NEEDLING MOBILITY ENDURANCE FORCE ATHLETES SOCCER MUSCLE INJURIES
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2018/4/24
Purpose Increase in muscle force, endurance, and flexibility is desired in elite athletes to improve performance and to avoid injuries, but it is often hindered by the occurrence of myofascial trigger...
Asymmetry and Thigh Muscle Coactivity in Fatigued Anterior Cruciate Ligament–Reconstructed Elite Skiers
KNEE INJURY ALPINE SKIING HAMSTRING QUADRICEPS INJURY PREVENTION RETURN TO SPORT
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2018/4/24
Purpose The acute effects of fatigue on functional interlimb asymmetry and quadriceps/hamstring muscle activity levels, including preparatory coactivation during squat jump takeoff and landing, were e...
张坤和TOM的横踢技术运动生物力学比较分析
横踢技术,支撑腿,进攻腿,角速度,肌电
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2017/5/26
设置靶模具和信号灯，运用两台CASIO-EXFH25摄像机对两名国际级散打和泰拳选手后横踢动作进行同步拍摄，采用APAS系统（美国）进行三维视频图像解析，用Megwin Me6000表面肌电同步肌肉活动信号，对中泰横踢技术各运动环节支撑腿和进攻腿髋、膝、踝关节速度和角度变化特征，肌肉动员顺序、肌电特征进行对比分析，寻找差距，揭示技术动作内在规律，以期为鞭腿技术动作的教学、训练提供科学依据。