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Timing matters: diurnal variation of maximal fat oxidation and substrate oxidation rates in metabolic syndrome-a randomized crossover study.
Methnani, Jabeur; Brahim, Mohamed Mustapha; Elhraiech, Aymen; Ach, Taieb; Latiri, Imed; Zaouali, Monia; Rouatbi, Sonia; Bouslama, Ali; Brun, Jean-Fréderic; Omezzine, Asma; Bouhlel, Ezdine.
Afiliación
  • Methnani J; High Institute of Sport and Physical Education, University of Manouba, Ksar Said, Tunis, Tunisia. Jabeur.methnani@gmail.com.
  • Brahim MM; LR19ES09, Laboratoire de Physiologie de l'Exercice et Physiopathologie: de l'Intégré au Moléculaire Biologie, Médecine et Santé, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia. Jabeur.methnani@gmail.com.
  • Elhraiech A; LR12SP11, Biochemistry Department, Sahloul University Hospital, Sousse, Tunisia. Jabeur.methnani@gmail.com.
  • Ach T; High Institute of Sport and Physical Education, University of Manouba, Ksar Said, Tunis, Tunisia.
  • Latiri I; LR19ES09, Laboratoire de Physiologie de l'Exercice et Physiopathologie: de l'Intégré au Moléculaire Biologie, Médecine et Santé, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia.
  • Zaouali M; Service of Cardiology, University of Sousse, Sahloul University Hospital, Sousse, Tunisia.
  • Rouatbi S; LR19ES09, Laboratoire de Physiologie de l'Exercice et Physiopathologie: de l'Intégré au Moléculaire Biologie, Médecine et Santé, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia.
  • Bouslama A; Service of Endocrinology, University of Sousse, Farhat HACHED University Hospital, Sousse, Tunisia.
  • Brun JF; LR12SP09, Research Laboratory, Heart Failure, University of Sousse, Farhat HACHED University Hospital, Sousse, Tunisia.
  • Omezzine A; Service of Physiology and Functional Explorations, University of Sousse, Farhat HACHED University Hospital, Sousse, Tunisia.
  • Bouhlel E; LR19ES09, Laboratoire de Physiologie de l'Exercice et Physiopathologie: de l'Intégré au Moléculaire Biologie, Médecine et Santé, Faculty of Medicine of Sousse, 4002, Sousse, Tunisia.
Eur J Appl Physiol ; 2024 Jun 04.
Article en En | MEDLINE | ID: mdl-38832982
ABSTRACT

PURPOSE:

The aim of this study was to investigate if diurnal oscillation in maximal fat oxidation (MFO) and substrate oxidation rates during exercise exists in subjects with metabolic syndrome (MetS).

METHODS:

In a randomized crossover design, 14 MetS patients were assigned to two graded exercise tests conditions performed in the morning (between 700 and 900 a.m) and in the afternoon (between 400 and 500 p.m). MFO was defined as the highest absolute value of fat oxidation obtained from the average of last 2-min stages during an indirect calorimetry test.

RESULTS:

MFO increased by 20.6% from morning to afternoon (p = 0.0002, Cohen's d = 0.52). There was a significant time of day, (p < 0.0001, η2p = 0.76) and intensity effect (p = 0.002, η2p = 0.32) in fat oxidation (Fatox) rates indicating that Fatox was higher in the afternoon than in the morning.

CONCLUSION:

Our study extends previous findings on the existence of diurnal variation in maximal fat oxidation to MetS patients, highlighting the afternoon as a more favorable time for fat utilization during exercise. These findings have practical implications for optimizing training timing in MetS patients. TRIAL REGISTRATION NUMBER PACTR202306776991260.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Eur J Appl Physiol Asunto de la revista: FISIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Túnez Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Eur J Appl Physiol Asunto de la revista: FISIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Túnez Pais de publicación: Alemania