Speed and surface steepness affect internal tibial loading during running  

作　　者：Hannah Rice Markus Kurz Patrick Mai Leon Robertz Kevin Bill Timothy R.Derrick Steffen Willwacher 

机构地区：[1]Department of Physical Performance,Norwegian School of Sport Sciences,Oslo 0806,Norway [2]Sports Tech Research Centre,Mid Sweden University,Östersund SE-83125,Sweden [3]Department of Mechanical and Process Engineering,Offenburg University of Applied Sciences,Offenburg 77652,Germany [4]Institute of Biomechanics and Orthopaedics,German Sport University Cologne,Cologne 50933,Germany [5]Department of Kinesiology,Iowa State University,Ames,IA 50011,USA

出　　处：《Journal of Sport and Health Science》2024年第1期118-124,共7页运动与健康科学（英文）

摘　　要：Background:Internal tibial loading is influenced by modifiable factors with implications for the risk of stress injury.Runners encounter varied surface steepness(gradients)when running outdoors and may adapt their speed according to the gradient.This study aimed to quantify tibial bending moments and stress at the anterior and posterior peripheries when running at different speeds on surfaces of different gradients.Methods:Twenty recreational runners ran on a treadmill at 3 different speeds(2.5 m/s,3.0 m/s,and 3.5 m/s)and gradients(level:0%;uphill:+5%,+10%,and+15%;downhill:-5%,-10%,and-15%).Force and marker data were collected synchronously throughout.Bending moments were estimated at the distal third centroid of the tibia about the medial-lateral axis by ensuring static equilibrium at each 1%of stance.Stress was derived from bending moments at the anterior and posterior peripheries by modeling the tibia as a hollow ellipse.Two-way repeated-measures analysis of variance were conducted using both functional and discrete statistical analyses.Results:There were significant main effects for running speed and gradient on peak bending moments and peak anterior and posterior stress.Higher running speeds resulted in greater tibial loading.Running uphill at+10%and+15%resulted in greater tibial loading than level running.Running downhill at-10%and-15%resulted in reduced tibial loading compared to level running.There was no difference between+5%or-5%and level running.Conclusion:Running at faster speeds and uphill on gradients≥+10%increased internal tibial loading,whereas slower running and downhill running on gradients≥-10%reduced internal loading.Adapting running speed according to the gradient could be a protective mechanism,providing runners with a strategy to minimize the risk of tibial stress injuries.

关 键 词：Bending moments GRADIENT Musculoskeletal modeling Overuse injury Tibial stress Training factors 

分 类 号：G822[文化科学—体育训练]