Sprint Start Kinetics of Amputee and Non-Amputee Sprinters.
Sprint Start Kinetics of Amputee and Non-Amputee Sprinters.
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DOI：
10.1371/journal.pone.0166219
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Brüggemann GP
中科院分区：
文献类型：
--
作者：
Willwacher S;Herrmann V;Heinrich K;Funken J;Strutzenberger G;Goldmann JP;Braunstein B;Brazil A;Irwin G;Potthast W;Brüggemann GP
本研究旨在探讨截肢与非截肢短跑运动员起跑时，起跑器所受作用力与起跑成绩的关系。154名男性和女性NAS的SP（100米个人记录[PR]，9.58-14.00 s）和7名男性AS单侧膝上3例，单侧膝下3例，双侧膝下1例; 100 m PR，11.70-12.70 s），在全过程中分析了特定假体（RSP）的运行情况。努力冲刺使用测量3D中所施加的力的仪表化起始块开始。使用NAS数据集和因子分析和多元回归技术的组合，我们探讨了力特征和SP（量化的归一化平均水平块功率）之间的关系。随后比较了AS和NAS之间的启动动力学，这些AS和NAS基于他们的绝对100米PR和他们的100米PR相对于他们的启动级别的世界纪录进行匹配。在NAS中，SP中86%的方差与5个潜在因素共享，在这些因素上加载了与施加到后部和前部块的力以及运动矢状面中的相应推出方向相关的测量参数。内外侧施力对SP的影响很小。与基于相对100 m PR匹配的NAS相比，AS的SP显著降低（−33.8%; d = 2.11，p < 0.001），而使用绝对100 m PR时观察到的性能降低不显著（−17.7%; d = 0.79，p = 0.09）。这些结果至少部分地解释了这样一个事实，即施加到后块的力在AS的受影响的腿中明显受损。
The purpose of this study was to explore the relationship between the forces applied to the starting blocks and the start performances (SPs) of amputee sprinters (ASs) and non-amputee sprinters (NASs). SPs of 154 male and female NASs (100-m personal records [PRs], 9.58–14.00 s) and 7 male ASs (3 unilateral above knee, 3 unilateral below knee, 1 bilateral below knee; 100 m PRs, 11.70–12.70 s) with running specific prostheses (RSPs) were analysed during full-effort sprint starts using instrumented starting blocks that measured the applied forces in 3D. Using the NAS dataset and a combination of factor analysis and multiple regression techniques, we explored the relationship between force characteristics and SP (quantified by normalized average horizontal block power). Start kinetics were subsequently compared between ASs and NASs who were matched based on their absolute 100 m PR and their 100 m PR relative to the world record in their starting class. In NASs, 86% of the variance in SP was shared with five latent factors on which measured parameters related to force application to the rear and front blocks and the respective push-off directions in the sagittal plane of motion were loaded. Mediolateral force application had little influence on SP. The SP of ASs was significantly reduced compared to that of NASs matched on the basis of relative 100-m PR (−33.8%; d = 2.11, p < 0.001), while a non-significant performance reduction was observed when absolute 100-m PRs were used (−17.7%; d = 0.79, p = 0.09). These results are at least partially explained by the fact that force application to the rear block was clearly impaired in the affected legs of ASs.
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DOI：
10.1249/mss.0b013e318216ea37
发表时间：
2011-09-01
期刊：
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
影响因子：
--
作者：
Morin, Jean-Benoit;Edouard, Pascal;Samozino, Pierre
通讯作者：
Samozino, Pierre
影响因子：
9.8
作者：
Harland, MJ;Steele, JR
通讯作者：
Steele, JR
影响因子：
5.5
作者：
CAVAGNA, GA;KOMAREK, L;MAZZOLENI, S
通讯作者：
MAZZOLENI, S
影响因子：
6.8
作者：
AKAIKE, H
通讯作者：
AKAIKE, H
影响因子：
2.7
作者：
Welch, BL
通讯作者：
Welch, BL