文章基本信息

标题：Effect of minimal shoes and slope on vertical and leg stiffness during running
本地全文：下载
作者：Thibault Lussiana ; Kim Hébert-Losier ; Laurent Mourot 等
期刊名称：Journal of Sport and Health Science
印刷版ISSN：2095-2546
出版年度：2015
卷号：4
期号：2
页码：195-202
DOI：10.1016/j.jshs.2013.09.004
出版社：Elsevier
摘要：Purpose: This study was designed to characterize and compare the vertical (k"v"e"r"t) and leg (k"l"e"g) stiffness measured during running in two different footwear conditions on negative, level, and positive slopes, using kinematic data only. Methods: Fourteen male recreational runners (age 23.4 +/- 4.4 years, height 177.5 +/- 5.2 cm, and body mass 69.5 +/- 5.3 kg) were tested on 2 separate days within 1 week. At each session, subjects ran seven 5-min trials on a treadmill at 10 km/h, interspersed with 5 min of sitting passive recovery. Each trial was performed on a different slope gradient, ranging from -8% (downhill) to +8% (uphill), assigned in a random order. Furthermore, each subject ran one 5-min trial wearing minimal shoes (MS) and the subsequent trial wearing traditional shoes (TS) in a counter-balanced randomized order ensuring that each slope was ran once in MS and once in TS. Kinematic data were collected using a photocell measuring system and high-speed video camera, with k"v"e"r"t and k"l"e"g stiffness being calculated from these data. Results: Leg compression, contact times, and vertical displacement of the center of mass during running were significantly smaller in MS compared to TS across all slopes. In the two footwear conditions, step frequency significantly increased with a (positive) increase in slope. Kinematic analyses indicated that k"l"e"g was greater when running in MS than TS and this between-footwear difference remained similar across slopes. On the contrary, k"v"e"r"t did not change on the basis of footwear, but increased with positive increases in slope. Conclusion: This study showed that k"v"e"r"t and k"l"e"g during running respond differently to change in footwear and/or slope. These two stiffness measures can hence provide a unique insight on the biomechanical adaptations of running under varying conditions and their respective quantification may assist in furthering our understanding of training, performance, and/or injury in this sport.
关键词：Incline; Minimal shoes; Running; Spring; mass model; Stiffness