Department of Physical Education and Sport, University of Granada, Granada, Spain.
Sport and Health University Research Center (iMUDS), Granada, Spain.
J Strength Cond Res. 2023 Nov 1;37(11):2260-2266. doi: 10.1519/JSC.0000000000004523.
Ruiz-Alias, SA, Pérez-Castilla, A, Soto-Hermoso, VM, and García-Pinillos, F. Influence of the world athletics stack height regulation on track running performance. J Strength Cond Res 37(11): 2260-2266, 2023-A new footwear regulation based on limiting the stack height (i.e., amount of material between the feet and the ground) has been established by World Athletics to ensure that performance is achieved through the primacy of human effort over technology in running shoes. Analyzing the effect of legal and illegal shoes on running performance is therefore needed to determine its effectiveness. Thus, this study aimed (a) to compare the effect of 2 footwear models categorized as legal and illegal by the World Athletics regulation on track running performance and (b) to analyze the derived metrics of the athletes' biomechanics when using each footwear model at racing paces. Within 1 week, 14 highly trained athletes performed 2 testing sessions composed of 2 time trials of 9- and 3-minute duration with 30 minutes of recovery between them. The athletes wore the "Nike ZoomX Dragonfly" track spikes model and the "Nike ZoomX Vaporfly Next % 2" marathon shoe model in a counterbalanced randomized order. The results revealed that (a) there was only a small worthwhile improvement in the 3-minute time trial when using the marathon shoes of 0.97% (-0.04 to 1.98%) and (b) there was a main effect of footwear in 7 of the 9 biomechanical variables analyzed (p ≤ 0.050). The ground contact time was the unique performance predictor (p = 0.005, adjusted R2 = 0.476). Altogether, the use of legal and illegal running shoes altered the runners form, which only influenced the mid-distance performance.
Ruiz-Alias，SA，Pérez-Castilla，A，Soto-Hermoso，VM 和 García-Pinillos，F. 世界田径叠层高度规定对径赛跑步表现的影响。J 力量与体能研究 37（11）：2260-2266，2023-世界田径建立了一项新的鞋类规定，基于限制叠层高度（即脚与地面之间的材料量），以确保跑步表现主要通过人类努力而非技术来实现。因此，需要分析合法和非法鞋对跑步表现的影响，以确定其效果。因此，本研究旨在：（a）比较世界田径规定归类为合法和非法的 2 种鞋类模型对径赛跑步表现的影响；（b）分析运动员在使用每种鞋类模型时的生物力学衍生指标。在 1 周内，14 名训练有素的运动员进行了 2 次测试，每次测试包括 2 次 9 分钟和 3 分钟的计时赛，两次之间有 30 分钟的恢复期。运动员穿着“Nike ZoomX Dragonfly”钉鞋和“Nike ZoomX Vaporfly Next % 2”马拉松跑鞋，以平衡随机的顺序进行测试。结果表明：（a）使用马拉松鞋时，3 分钟计时赛仅略有改善，为 0.97%（-0.04 至 1.98%）；（b）在分析的 9 个生物力学变量中有 7 个存在鞋类的主要影响（p≤0.050）。触地时间是唯一的表现预测指标（p=0.005，调整 R2=0.476）。总之，合法和非法跑鞋的使用改变了跑步者的姿势，这仅影响了中距离的表现。
