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首页> 外文期刊>Journal of Biomechanics >Ground reaction forces during downhill and uphill running
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Ground reaction forces during downhill and uphill running

机译：下坡和上坡行驶时的地面反作用力

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We investigated the normal and parallel ground reaction forces during downhill and uphill running. Our rationale was that these force data would aid in the understanding of hill running injuries and energetics. Based on a simple spring-mass model, we hypothesized that the normal force peaks, both impact and active, would increase during downhill running and decrease during uphill running. We anticipated that the parallel braking force peaks would increase during downhill running and the parallel propulsive force peaks would increase during uphill running. But, we could not predict the magnitude of these changes. Five male and five female subjects ran at 3 m/s on a force treadmill mounted on the level and on 3degrees, 6degrees, and 9degrees wedges. During downhill running, normal impact force peaks and parallel braking force peaks were larger compared to the level. At -9degrees, the normal impact force peaks increased by 54%, and the parallel braking force peaks increased by 73%. During uphill running, normal impact force peaks were smaller and parallel propulsive force peaks were larger compared to the level. At + 9degrees, normal impact force peaks were absent, and parallel propulsive peaks increased by 75%. Neither downhill nor uphill running affected normal active force peaks. Combined with previous biomechanics studies, our normal impact force data suggest that downhill running substantially increases the probability of overuse running injury. Our parallel force data provide insight into past energetic studies, which show that the metabolic cost increases during downhill running at steep angles. (C) 2004 Elsevier Ltd. All rights reserved.
机译：我们研究了下坡和上坡行驶过程中正常和平行的地面反作用力。我们的理由是，这些力数据将有助于理解坡道行驶的伤害和能量。基于简单的弹簧质量模型，我们假设法向力峰值（包括冲击力和主动力）在下坡行驶期间会增大，在上坡行驶期间会减小。我们预计在下坡行驶期间平行制动力峰值将增加，在上坡行驶期间平行推进力峰值将增加。但是，我们无法预测这些变化的程度。五名男性和五名女性受试者以3 m / s的速度在水平和3度，6度和9度坡度上安装的力量跑步机上跑步。在下坡行驶期间，正常冲击力峰值和平行制动力峰值比该水平大。在-9度时，法向冲击力峰值增加了54％，平行制动力峰值增加了73％。在上坡行驶期间，与水平相比，正常冲击力峰值较小，而平行推进力峰值较大。在+ 9度时，没有正常的冲击力峰，并且平行的推进力峰增加了75％。下坡或上坡行驶都不会影响正常的作用力峰值。结合以前的生物力学研究，我们的正常冲击力数据表明，下坡行驶会大大增加过度使用行驶伤害的可能性。我们的平行力数据提供了对以前精力充沛的研究的了解，这些研究表明，在陡坡下坡跑步过程中，代谢成本增加。 （C）2004 Elsevier Ltd.保留所有权利。

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