Title :

Dietary Nitrate Supplementation Does Not Improve Tolerance to Supramaximal Intensity Intermittent Exercise in Elite Endurance Athletes

Author(s) :

Pawlak Chaouch, Mehdi [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Boissiere, Julien [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369
Munyaneza, Désiré [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369 - ULR 4488 [URePSSS]
Gamelin, Francois-Xavier [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369
Cuvelier, Grégory [Auteur]
Berthoin, Serge [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - ULR 7369
Aucouturier, Julien [Auteur]
Unité de Recherche Pluridisciplinaire Sport, Santé, Société (URePSSS) - EA 7369

Conference title :

2e Congrès annuel national de physiologie et biologie intégrative

Conference organizers(s) :

SPBI

City :

Lille, France

Country :

France

Start date of the conference :

2018-06-27

Journal title :

ACTA PHYSIOLOGICA

Abbreviated title :

Acta Physiol

Publisher :

Wiley

Publication date :

2018-10-27

ISSN :

1748-1708

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

Introduction: Although 15% of the total race duration in cycling or triathlon can be performed at intensities beyond VO2max, little is known about the effectiveness of dietary NO3- supplementation on tolerance to supramaximal ...
Show more >Introduction: Although 15% of the total race duration in cycling or triathlon can be performed at intensities beyond VO2max, little is known about the effectiveness of dietary NO3- supplementation on tolerance to supramaximal intensity intermittent exercise in endurance athletes. Our aim was therefore to determine whether dietary NO3- supplementation enhances the tolerance to supramaximal intensity intermittent exercise in elite endurance-trained athletes. Methods: Using a randomized, single-blind, cross-over design, 9 elite endurance athletes 3.7 years, maximal oxygen uptake performed a supramaximal intensity intermittent exercise test following either a 3-day beetroot juice supplementation (BJ, NO3- content of 680 mg L−1), or a placebo supplementation (PL, NO3- content <5 mg L−1). The exercise test consisted of 15-s cycling exercise bouts at 170% of the maximal aerobic power interspersed with 30-s passive recovery periods performed until volitional exhaustion. Gas exchange measurements (indirect calorimetry), changes in local muscle oxygenation, and microvascular THb concentration were measured by Near Infrared Spectroscopy (NIRS). Results: Dietary NO3- supplementation did not increase the tolerance to supramaximal intensity intermittent exercise (). Dietary NO3- supplementation did not affect oxygen uptake (VO2) during supramaximal intensity intermittent exercise tests . The area under the curve for microvascular total hemoglobin (AUC-THb) was not different between the two conditions Discussion/conclusion: A short-term dietary NO3- supplementation did not increase the tolerance to supramaximal intensity intermittent exercise in elite endurance athletes high VO2max (>60 mL kg−1 min−1).Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

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

Collections :

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

Research team(s) :

Activité Physique, Muscle, Santé (APMS)
Activité Physique, Muscle, Santé (APMS)

Submission date :

2023-03-12T06:45:25Z
2023-03-29T10:51:41Z
2023-03-29T10:58:36Z