Frank Nicholas S, Prentice Stephen D, Callaghan Jack P
Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
Department of Kinesiology, University of Waterloo, Waterloo, Ontario, Canada.
Gait Posture. 2019 Feb;68:50-54. doi: 10.1016/j.gaitpost.2018.10.034. Epub 2018 Nov 5.
Understanding how footwear cushioning influences movement stability may be helpful in reducing injuries related to repetitive loading.
The purpose of this study was to identify the relationship between running experience and midsole cushioning on local dynamic stability of the ankle, knee and hip.
Twenty-four trained and novice runners were recruited to run on a treadmill for five minutes at the same relative intensity. Midsole thickness (thick/thin) and stiffness (soft / hard) were manipulated yielding four unique conditions. Lyapunov exponents were estimated using the Wolf algorithm from sagittal ankle, knee and hip kinematics.
Trained runners had increased movement stability in all shoe conditions compared to their novice counterparts. Midsole thickness and stiffness, overall, did not affect movement stability within each of the running groups. Novice runners displayed decreased movement stability at the hip while running in the thick/soft running shoes. It was found that running experience has a greater influence on movement stability in the lower limbs compared to the midsole characteristics that were manipulated in this experiment. The hip was most stable followed by the knee and the ankle highlighting decreased stability in distal joints.
It appears that midsole design within current design ranges do not have the ability to influence movement stability.
了解鞋类缓冲如何影响运动稳定性可能有助于减少与重复性负荷相关的损伤。
本研究的目的是确定跑步经验与中底缓冲对踝关节、膝关节和髋关节局部动态稳定性之间的关系。
招募24名训练有素的跑步者和新手在跑步机上以相同的相对强度跑步5分钟。对中底厚度（厚/薄）和硬度（软/硬）进行操控，产生四种独特的条件。使用Wolf算法从矢状面踝关节、膝关节和髋关节运动学估计李雅普诺夫指数。
与新手相比，训练有素的跑步者在所有鞋类条件下运动稳定性均有所提高。总体而言，中底厚度和硬度并未影响每个跑步组内的运动稳定性。新手跑步者在穿着厚/软跑鞋跑步时，髋关节的运动稳定性下降。研究发现，与本实验中操控的中底特性相比，跑步经验对下肢运动稳定性的影响更大。髋关节最稳定，其次是膝关节和踝关节，表明远端关节稳定性降低。
目前设计范围内的中底设计似乎无法影响运动稳定性。
