da Silva Azevedo Ana Paula, Mezêncio Bruno, Valvassori Raísa, Mochizuki Luis, Amadio Alberto Carlos, Serrão Júlio Cerca
Laboratory of Biomechanics, School of Physical Education and Sport, University of São Paulo, 65 Professor Mello Moraes Avenue, Butantã, São Paulo 05508-030, Brazil.
Laboratory of Biomechanics, School of Physical Education and Sport, University of São Paulo, 65 Professor Mello Moraes Avenue, Butantã, São Paulo 05508-030, Brazil.
Gait Posture. 2016 May;46:142-6. doi: 10.1016/j.gaitpost.2016.03.008. Epub 2016 Mar 21.
This study evaluated if running in a "transition shoe" commercially available results in intermediate mechanical load upon lower extremities compared to conventional shoe and minimalist shoe/barefoot. Kinematic and kinetic parameters while running in different shoe conditions were compared. Fourteen runners (12 men, 2 women; age=28.4±7.3 years), inexperienced in minimalist shoes and barefoot running, ran on an instrumented treadmill within four experimental conditions (conventional shoe - CS, transition shoe - TrS, minimalist shoe - MS, and barefoot - BF). Running was performed at 9km/h for 10min in each experimental condition. Vertical ground reaction force (VGRF) and two-dimensional kinematic variables of lower limbs (both legs) were recorded. Nine data acquisitions (10s) were conducted for each footwear condition. Transition shoe lead to significant changes in VGRF variables related to impact control, while kinematic parameters were little affected. The TrS had smaller first peak of VGRF (Fy1) than CS (p≤0.001) and higher than MS (p=0.050) and BF (p≤0.001). Time to first peak of VGRF (tFy1) of TrS was smaller than CS (p≤0.001) and higher than MS (p≤0.001) and BF (p≤0.001). The TrS and MS induced to lesser knee flexion (p<0.001) and greater dorsiflexion (p<0.001) than CS and BF. Thus, results suggest the transition shoe (TrS) tested seem to promote an intermediate mechanical load condition only for VGRF parameters, presenting values of impact forces between those found for conventional shoe and minimalist shoe/barefoot. Such knowledge could be useful for the transition process from conventional running shoe to minimalist shoe/barefoot.
本研究评估了与传统跑鞋和极简跑鞋/赤足相比，穿着市售的“过渡跑鞋”跑步是否会使下肢承受中等机械负荷。比较了在不同跑鞋条件下跑步时的运动学和动力学参数。14名跑步者（12名男性，2名女性；年龄=28.4±7.3岁），没有穿着极简跑鞋和赤足跑步的经验，在四种实验条件下（传统跑鞋-CS、过渡跑鞋-TrS、极简跑鞋-MS和赤足-BF）在装有仪器的跑步机上跑步。在每种实验条件下，以9公里/小时的速度跑10分钟。记录垂直地面反作用力（VGRF）和下肢（双腿）的二维运动学变量。每种鞋类条件进行9次数据采集（10秒）。过渡跑鞋导致与冲击控制相关的VGRF变量发生显著变化，而运动学参数受影响较小。TrS的VGRF第一峰值（Fy1）小于CS（p≤0.001），高于MS（p=0.050）和BF（p≤0.001）。TrS的VGRF第一峰值时间（tFy1）小于CS（p≤0.001），高于MS（p≤0.001）和BF（p≤0.001）。与CS和BF相比，TrS和MS导致较小的膝关节屈曲（p<0.001）和较大的背屈（p<0.001）。因此，结果表明，所测试的过渡跑鞋（TrS）似乎仅在VGRF参数方面促进中等机械负荷条件，其冲击力值介于传统跑鞋和极简跑鞋/赤足之间。这些知识可能有助于从传统跑鞋向极简跑鞋/赤足的过渡过程。
