Technical Ability of Force Application as a Determinant Factor of Sprint Performance
Technical Ability of Force Application as a Determinant Factor of Sprint Performance
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DOI：
10.1249/mss.0b013e318216ea37
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发表时间：
2011-09-01
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影响因子：
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通讯作者：
Samozino, Pierre
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文献类型：
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作者：
Morin, Jean-Benoit;Edouard, Pascal;Samozino, Pierre
莫林,jb,。P.爱德华和P.萨莫齐诺。力的运用技术能力是短跑成绩的决定因素。医学科学。体育Exerc。，第43卷第9期，第1680-1688页，2011年。目的：我们将踏板力学中使用的施力有效性的概念转换为冲刺跑步中的力比（RF），并验证了现场冲刺表现与产生大量净正水平力的技术能力相关的假设。这种能力代表了尽管在加速阶段速度增加，但下肢产生的总力是如何有效地施加到地面上的。方法：12名体力活跃的男性受试者（包括2名短跑运动员）在最近验证的器械跑步机上进行8秒短跑，并在田径跑道上进行100米短跑。在加速过程中，每一步测量的平均垂直（F-V）、净水平（F-H）和总地面反作用力（F-Tot）允许将RF计算为F-H/F-Tot，并将施力技术指数（D-RF）计算为RF-速度线性关系从开始到最高速度的斜率。测试了这些机械变量与雷达测量的现场短跑表现变量之间的相关性：平均和最高100米速度以及4秒距离。结果：D-RF与100米性能（平均速度和最高速度；4-s距离）之间具有显著相关性（r > 0.731; P < 0.01）。F-H与田间冲刺成绩显著相关（P < 0.05）， F-Tot和F-V不显著相关。结论：施力技术是田径100米短跑成绩的决定因素，而对地面施力总量的决定因素并非如此。似乎在冲刺加速过程中，施加在支撑地面上的总力的方向比其大小对成绩更重要。
MORIN, J-B., P. EDOUARD, and P. SAMOZINO. Technical Ability of Force Application as a Determinant Factor of Sprint Performance. Med. Sci. Sports Exerc., Vol. 43, No. 9, pp. 1680-1688, 2011. Purpose: We transposed the concept of effectiveness of force application used in pedaling mechanics to calculate the ratio of forces (RF) during sprint running and tested the hypothesis that field sprint performance was related to the technical ability to produce high amounts of net positive horizontal force. This ability represents how effectively the total force developed by the lower limbs is applied onto the ground, despite increasing speed during the acceleration phase. Methods: Twelve physically active male subjects (including two sprinters) performed 8-s sprints on a recently validated instrumented treadmill, and a 100-m sprint on an athletics track. Mean vertical (F-V), net horizontal (F-H), and total (F-Tot) ground reaction forces measured at each step during the acceleration allowed computation of the RF as F-H/F-Tot and an index of force application technique (D-RF) as the slope of the RF-speed linear relationship from the start until top speed. Correlations were tested between these mechanical variables and field sprint performance variables measured by radar: mean and top 100-m speeds and 4-s distance. Results: Significant (r > 0.731; P < 0.01) correlations were obtained between D-RF and 100-m performance (mean and top speeds; 4-s distance). Further, F-H was significantly correlated (P < 0.05) to field sprint performance, but F-Tot and F-V were not. Conclusions: Force application technique is a determinant factor of field 100-m sprint performance, which is not the case for the amount of total force subjects are able to apply onto the ground. It seems that the orientation of the total force applied onto the supporting ground during sprint acceleration is more important to performance than its amount.