Lussiana Thibault, Hébert-Losier Kim, Millet Grégoire P, Mourot Laurent
Research unit EA4660, Culture Sport Health Society and Exercise Performance Health Innovation platform, Franche-Comté University, France.
J Appl Biomech. 2016 Feb;32(1):40-9. doi: 10.1123/jab.2015-0108. Epub 2015 Sep 14.
The effects of footwear and inclination on running biomechanics over short intervals are well documented. Although recognized that exercise duration can impact running biomechanics, it remains unclear how biomechanics change over time when running in minimalist shoes and on slopes. Our aims were to describe these biomechanical changes during a 50-minute run and compare them to those observed in standard shoes. Thirteen trained recreational male runners ran 50 minutes at 65% of their maximal aerobic velocity on a treadmill, once in minimalist shoes and once in standard shoes, 1 week apart in a random order. The 50-minute trial was divided into 5-minute segments of running at 0%, +5%, and -5% of treadmill incline sequentially. Data were collected using photocells, high-speed video cameras, and plantar-pressure insoles. At 0% incline, runners exhibited reduced leg stiffness and plantar flexion angles at foot strike and lower plantar pressure at the forefoot and toes in minimalist shoes from minute 34 of the protocol onward. However, only reduced plantar pressure at the toes was observed in standard shoes. Overall, similar biomechanical changes with increased exercise time were observed on the uphill and downhill inclines. The results might be due to the unfamiliarity of subjects to running in minimalist shoes.
鞋类和倾斜度对短时间跑步生物力学的影响已有充分记录。尽管人们认识到运动持续时间会影响跑步生物力学，但在穿着极简主义跑鞋和在斜坡上跑步时，生物力学如何随时间变化仍不清楚。我们的目的是描述50分钟跑步过程中的这些生物力学变化，并将其与在标准跑鞋中观察到的变化进行比较。13名训练有素的男性业余跑步者在跑步机上以其最大有氧速度的65%跑50分钟，一次穿极简主义跑鞋，一次穿标准跑鞋，两次跑步间隔1周，顺序随机。50分钟的试验被分为依次在跑步机倾斜度为0%、+5%和-5%的情况下进行5分钟的跑步段。使用光电管、高速摄像机和足底压力鞋垫收集数据。在0%倾斜度时，从方案的第34分钟起，穿着极简主义跑鞋的跑步者在着地时腿部僵硬度和跖屈角度减小，前脚掌和脚趾处的足底压力降低。然而，在标准跑鞋中仅观察到脚趾处的足底压力降低。总体而言，在上坡和下坡倾斜度时，随着运动时间增加，观察到了类似的生物力学变化。结果可能是由于受试者对穿着极简主义跑鞋跑步不熟悉所致。
