Yang Zihan, Cui Chuyi, Zhou Zhipeng, Zheng Zhiyi, Yan Songhua, Liu Hui, Qu Feng, Zhang Kuan
Fashion Accessory Art and Engineering College, Beijing Institute of Fashion Technology, Beijing, China; School of Biomedical Engineering, Capital Medical University, Beijing, China; Beijing Key Laboratory of Fundamental Research on Biomechanics in Clinical Application, Capital Medical University, Beijing, China; Biomechanics Laboratory, Beijing Sport University, Beijing, China.
Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA.
J Biomech. 2024 Mar;165:111996. doi: 10.1016/j.jbiomech.2024.111996. Epub 2024 Feb 15.
High loading impact associated with heel strikes causes running injuries. This study aimed to investigate how loading impact is affected by midsole hardness and running surface type. Twelve young rear-foot runners ran at a fixed speed along an 18 m runway wearing shoes with different midsole hardness (Asker C-45, C-50, C-55, C-60, from soft to hard) and on two different surfaces (rubber and concrete). We quantified vertical average loading rate (VALR) and vertical impact peak force (VIPF). We conducted midsole × surface repeated-measures ANOVA on loading impact measures, and one-sample t-tests to compare VALR with a threshold value (80 BW·s). Midsole hardness and surface type mainly affected VALR. Although no significant effect of these variables was observed for VIPF magnitude, there were effects on time to VIPF and steps with VIPF. Several combinations of midsole and surface hardness reduced VALR below 80 BW·s: Asker C-45 with both surfaces, and Asker C-50 with a rubber surface. The combination of softer midsole and surface effectively reduced loading rates as shown by increased time to VIPF and reduced VALR. Combining softer midsole and surface results in the greatest cushioning, which demonstrates the benefit of considering both factors in reducing running injuries.
与脚跟撞击相关的高负荷冲击会导致跑步损伤。本研究旨在探讨中底硬度和跑步路面类型如何影响负荷冲击。12名年轻的后足跑者穿着具有不同中底硬度（从软到硬依次为Asker C - 45、C - 50、C - 55、C - 60）的鞋子，在两种不同路面（橡胶和混凝土）上以固定速度沿18米跑道跑步。我们对垂直平均负荷率（VALR）和垂直冲击峰值力（VIPF）进行了量化。我们对负荷冲击测量值进行了中底×路面重复测量方差分析，并进行单样本t检验以将VALR与阈值（80体重·秒）进行比较。中底硬度和路面类型主要影响VALR。虽然未观察到这些变量对VIPF大小有显著影响，但对达到VIPF的时间和出现VIPF的步数有影响。中底和路面硬度的几种组合可将VALR降低至80体重·秒以下：两种路面搭配Asker C - 45，以及橡胶路面搭配Asker C - 50。如达到VIPF的时间增加和VALR降低所示，较软的中底和路面的组合有效降低了负荷率。较软的中底和路面相结合可产生最大的缓冲效果，这证明了在减少跑步损伤时考虑这两个因素的益处。
