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European Journal of Applied Physiology

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12.02.2021 | Original Article

A non-linear analysis of running in the heavy and severe intensity domains

verfasst von: Ben Hunter, Andrew Greenhalgh, Bettina Karsten, Mark Burnley, Daniel Muniz-Pumares

Erschienen in: European Journal of Applied Physiology | Ausgabe 5/2021

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Abstract

Purpose

Altered movement complexity, indicative of system dysfunction, has been demonstrated with increased running velocity and neuromuscular fatigue. The critical velocity (CV) denotes a metabolic and neuromuscular fatigue threshold. It remains unclear whether changes to complexity during running are coupled with the exercise intensity domain in which it is performed. The purpose of this study was to examine whether movement variability and complexity differ exclusively above the CV intensity during running.

Methods

Ten endurance-trained participants ran at 95%, 100%, 105% and 115% CV for 20 min or to task failure, whichever occurred first. Movement at the hip, knee, and ankle were sampled throughout using 3D motion analysis. Complexity of kinematics in the first and last 30 s were quantified using sample entropy (SampEn) and detrended fluctuation analysis (DFA-α). Variability was determined using standard deviation (SD).

Results

SampEn decreased during all trials in knee flexion/extension and it increased in hip internal/external rotation, whilst DFA-α increased in knee internal/external rotation. SD of ankle plantar/dorsiflexion and inversion/eversion, knee internal/external rotation, and hip flexion/extension and abduction/adduction increased during trials. Hip flexion/extension SampEn values were lowest below CV. DFA-α was lower at higher velocities compared to velocities below CV in ankle plantar/dorsiflexion, hip flexion/extension, hip adduction/abduction, hip internal/external rotation. In hip flexion/extension SD was highest at 115% CV.

Conclusions

Changes to kinematic complexity over time are consistent between heavy and severe intensity domains. The findings suggest running above CV results in increased movement complexity and variability, particularly at the hip, during treadmill running.

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Titel: A non-linear analysis of running in the heavy and severe intensity domains
verfasst von: Ben Hunter
Andrew Greenhalgh
Bettina Karsten
Mark Burnley
Daniel Muniz-Pumares
Publikationsdatum: 12.02.2021
Verlag: Springer Berlin Heidelberg
Erschienen in: European Journal of Applied Physiology / Ausgabe 5/2021
Print ISSN: 1439-6319
Elektronische ISSN: 1439-6327
DOI: https://doi.org/10.1007/s00421-021-04615-6

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A non-linear analysis of running in the heavy and severe intensity domains

Abstract

Purpose

Methods

Results

Conclusions

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Live-Webinar "Urologie und Sexualmedizin in der Praxis"

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Abstract

Purpose

Methods

Results

Conclusions

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