Segment-interaction in sprint start: Analysis of 3D angular velocity and kinetic energy in elite sprinters
Segment-interaction in sprint start: Analysis of 3D angular velocity and kinetic energy in elite sprinters
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DOI：
10.1016/j.jbiomech.2010.01.044
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发表时间：
2010-05-28
影响因子：
2.4
通讯作者：
Dumas, R.
中科院分区：
文献类型：
--
作者：
Slawinski, J.;Bonnefoy, A.;Dumas, R.
本研究的目的是测量优秀短跑运动员在短跑起跑过程中各节段的关节角速度和动能。这是使用整个身体的3D运动学分析进行的。八名精英短跑运动员（10.30 +/- 0.14秒100米时间），配备了63个被动反射标记，实现了四个最大的10米短跑开始在室内跑道上。使用由12个数码相机（250 Hz）组成的光电运动分析（R）系统来收集3D标记轨迹。在块上的推动阶段期间，计算每个关节的3D角速度矢量及其范数。计算了下肢、上肢和全身16个节段的动能。全身三维运动学分析表明，肩、胸、髋等关节的最大角速度不是屈伸运动，而是屈伸、外展、内收、内外旋的组合运动。在清除阻滞前达到全身最大动能（分别为537 +/- 59.3 J和514.9 +/- 66.0 J; p
The aim of the present study was to measure during a sprint start the joint angular velocity and the kinetic energy of the different segments in elite sprinters. This was performed using a 3D kinematic analysis of the whole body. Eight elite sprinters (10.30 +/- 0.14 s 100 m time), equipped with 63 passive reflective markers, realised four maximal 10 m sprints start on an indoor track. An opto-electronic Motion Analysis (R) system consisting of 12 digital cameras (250 Hz) was used to collect the 3D marker trajectories. During the pushing phase on the blocks, the 3D angular velocity vector and its norm were calculated for each joint. The kinetic energy of 16 segments of the lower and upper limbs and of the total body was calculated. The 3D kinematic analysis of the whole body demonstrated that joints such as shoulders, thoracic or hips did not reach their maximal angular velocity with a movement of flexion-extension, but with a combination of flexionextension, abduction-adduction and internal-external rotation. The maximal kinetic energy of the total body was reached before clearing block (respectively, 537 +/- 59.3 J vs. 514.9 +/- 66.0 J; p