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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

A Journal on Applied Physiology, Biomechanics, Preventive Medicine,
Sports Medicine and Traumatology, Sports Psychology


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ORIGINAL ARTICLE  EXERCISE PHYSIOLOGY AND BIOMECHANICS


The Journal of Sports Medicine and Physical Fitness 2017 March;57(3):171-8

DOI: 10.23736/S0022-4707.16.06053-9

Copyright © 2015 EDIZIONI MINERVA MEDICA

language: English

Correlation of gas exchange threshold and first muscle oxyhemoglobin inflection point with time-to-exhaustion during heavy-intensity exercise

Jérémy B. COQUART 1, Patrick MUCCI 2, Maxime L’HERMETTE 1, Karim CHAMARI 3, 4, Claire TOURNY 1, Murielle GARCIN 2

1 CETAPS, EA3238, Faculty of Sport Sciences, University of Rouen, Mont-Saint-Aignan, France; 2 UDSL, EA4488, University of Lille Nord de France, Ronchin, France; 3 Athlete Health and Performance Research Centre, ASPETAR, Doha, Qatar; 4 Orthopedic and Sports Medicine Hospital, Doha, Qatar


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BACKGROUND: The twofold aim of the study was to: 1) compare the gas exchange threshold (GET), the first oxyhemoglobin inflection point ([O2Hb]-T), and perceptual threshold as determined during an incremental exercise test, and 2) investigate the link between each threshold and time-to-exhaustion during heavy intensity exercise.
METHODS: Fourteen competitive cyclists performed an incremental exercise test to exhaustion on a cycloergometer to determine the different thresholds and peak workload (Wpeak). The participants then performed a sub-maximal constant workload test (90% Wpeak) to exhaustion to determine time-to-exhaustion. The thresholds were identified from: 1) the first breakpoint in the oxygen uptake vs. carbon dioxide output curve (GET), 2) the [O2Hb]-T, and 3) a rating of 13 in perceived exertion (perceptual threshold: RPE13-T).
RESULTS: Oxygen uptake at the different thresholds was not significantly different (P>0.05). Moreover, GET and [O2Hb]-T were significantly correlated: 1) to each other (r≥0.79; P≤0.001), and 2) to time-to-exhaustion (r=0.81 and r=0.72, respectively; P<0.01). RPE13-T, however, was not significantly correlated with the time-to-exhaustion (P=0.148).
CONCLUSIONS: The anaerobic threshold as identified from GET was concomitant to [O2Hb]-T. Both thresholds were correlated to time-to-exhaustion, and could therefore be used as a performance index in middle-duration events.


KEY WORDS: Anaerobic threshold - Near-infrared spectroscopy - Physical exertion - Bicycling

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Publication History

Issue published online: January 26, 2017
Article first published online: December 15, 2016
Manuscript accepted: November 25, 2015
Manuscript revised: November 13, 2015
Manuscript received: July 30, 2015

Cite this article as

Coquart JB, Mucci P, L’Hermette M, Chamari K, Tourny C, Garcin M. Correlation of gas exchange threshold and first muscle oxyhemoglobin inflection point with time-to-exhaustion during heavy-intensity exercise. J Sports Med Phys Fitness 2017;57:171-8. DOI: 10.23736/S0022-4707.16.06053-9

Corresponding author e-mail

jeremy.coquart@yahoo.com