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Effects of Fatigue on Running Mechanics Associated with Tibial Stress Fracture Risk

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Clansey, Adam C., Hanlon, Michael, Wallace, Eric S. and Lake, Mark J. (2012) Effects of Fatigue on Running Mechanics Associated with Tibial Stress Fracture Risk. Medicine & Science in Sports & Exercise, 44 (10). pp. 1917-1923. [Journal article]

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DOI: 10.1249/MSS.0b013e318259480d

Abstract

Purpose: The purpose of this study was to investigate the acute effects of progressive fatigue on the parameters of runningmechanics previously associated with tibial stress fracture risk.Methods: Twenty-one trained male distance runners performed three sets (Pre, Mid, and Post) of six overground running trials at 4.5 mIsj1 (T5%). Kinematic and kinetic data were collected during each trial using a 12-camera motion capture system, force platform,and head and leg accelerometers. Between tests, each runner ran on a treadmill for 20 min at their corresponding lactate threshold (LT) speed. Perceived exertion levels (RPE) were recorded at the third and last minute of each treadmill run. Results: RPE scores increased from 11.8 T 1.3 to 14.4 T 1.5 at the end of the first LT run and then further to 17.4 T 1.6 by the end of the second LT run. Peak rearfoot eversion, peak axial head acceleration, peak free moment and vertical force loading rates were shown to increase (P G 0.05) with moderate–large effect sizes during the progression from Pre to Post tests, although vertical impact peak and peak axial tibial acceleration were not significantly affected by the high-intensity running bouts. Conclusion: Previously identified risk factors for impact-related injuries (such as tibial stress fracture) are modified with fatigue. Because fatigue is associated with a reduced tolerance for impact, these findings lend support to the importance of those measures to identify individuals at risk of injury from lower limb impact loading during running.

Item Type:Journal article
Keywords:High Intensity, Kinematics, Kinetics, Overuse Injury Potential, Runners
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > Ulster Sports Academy
Research Institutes and Groups:Sport and Exercise Sciences Research Institute
Sport and Exercise Sciences Research Institute > Centre for Sports Science and Sports Medicine
ID Code:23942
Deposited By:Miss Fiona McAuley
Deposited On:12 Nov 2012 13:54
Last Modified:12 Nov 2012 13:54

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