Title :

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

Author(s) :

Coquart, Jeremy B J [Auteur]
Mucci, Patrick [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
L'hermette, Maxime [Auteur]
Chamari, Karim [Auteur]
Tourny, C [Auteur]
Garcin, Murielle [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 [SCALab]

Journal title :

The Journal of sports medicine and physical fitness

Abbreviated title :

J. Sports Med. Phys. Fit.

Volume number :

57

Pages :

171-178

Publication date :

2017-03-01

ISSN :

0022-4707

English keyword(s) :

Mesh:Physical Endurance/physiology
Mesh:Oxyhemoglobins/metabolism*
Mesh:Oxygen Consumption/physiology*
Mesh:Muscle
Mesh:Skeletal/physiology*
Mesh:Muscle
Mesh:Skeletal/blood supply
Mesh:Male
Mesh:Humans
Mesh:Heart Rate/physiology
Mesh:Healthy Volunteers
Mesh:Fatigue/physiopathology*
Mesh:Exercise Test*
Mesh:Bicycling*/physiology
Mesh:Anaerobic Threshold/physiology
Mesh:Adaptation
Mesh:Physiological
Mesh:Pulmonary Gas Exchange/physiology*
Mesh:Time Factors
Mesh:Young Adult
Mesh:Physical Fitness/physiology
Mesh:Physical Exertion/physiology*
Physical exertion
Anaerobic threshold
Near-infrared spectroscopy
Bicycling

HAL domain(s) :

Sciences du Vivant [q-bio]
Sciences cognitives

English abstract : [en]

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, ...
Show more >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.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CHU Lille
CNRS
Univ. Littoral Côte d’Opale
Univ. Artois
Université de Lille

Collections :

• Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369

Research team(s) :

Activité Physique, Muscle, Santé (APMS)

Submission date :

2019-09-24T07:29:01Z
2019-12-12T08:03:18Z