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The effects of fatiguing exercise and load carriage on the perception and initiation of movement
Johnson, Caleb D. Eagle, Shawn R. Nindl, Bradley C. Lovalekar, Mita T. Flanagan, Shawn D. Pepping, Gert-Jan Connaboy, Christopher
Johnson, Caleb D.
Eagle, Shawn R.
Nindl, Bradley C.
Lovalekar, Mita T.
Flanagan, Shawn D.
Pepping, Gert-Jan
Connaboy, Christopher
Abstract
Perceptual-motor coordination relies on the accurate coupling of the perceptual and movement systems. However, individuals must also be able to recalibrate to perturbations to perceptual and movement capabilities. We examined the effects of fatigue and load carriage on perceptual-motor coordination for a maximal leaping task. 23 participants completed an incremental fatigue protocol (light to fatiguing intensity stages) on two separate occasions (loaded/unloaded). At baseline and the end of every stage of the protocol, participants made perceptual judgments for the affordance of leaping. The accuracy of responses and reaction times were calculated and mean differences were assessed across exercise intensity and load carriage conditions. No interaction of exercise intensity and load carriage was detected, or main effect of load carriage. A main, quadratic effect of exercise intensity was detected on reaction times, with times decreasing through the moderate stage and increasing through post-fatigue. No effect of exercise/fatigue was detected on perceptual accuracy. The results indicate that exercise at high intensities through fatigue has a significant effect on perceptual-motor calibration. Contrastingly, in response to an action-scaled task, individuals can adequately recalibrate to increased load carriage.
Keywords
affordance, perceptual-motor coordination, perception-action, reaction time
Date
2021
Type
Journal article
Journal
European Journal of Sport Science
Book
Volume
21
Issue
1
Page Range
36-44
Article Number
ACU Department
School of Behavioural and Health Sciences
Faculty of Health Sciences
Faculty of Health Sciences
Relation URI
Source URL
Event URL
Open Access Status
License
All rights reserved
File Access
Controlled