Diurnal Variation of Maximal Fat-Oxidation Rate in Trained Male Athletes

Francisco J. Amaro-Gahete; Lucas Jurado-Fasoli; Alejandro R. Trivino; Guillermo Sanchez-Delgado; Alejandro De-la-O; Jorn W. Helge; Jonatan R. Ruiz

doi:10.1123/ijspp.2018-0854

Diurnal Variation of Maximal Fat-Oxidation Rate in Trained Male Athletes

Francisco J. Amaro-Gahete, Lucas Jurado-Fasoli, Alejandro R. Trivino, Guillermo Sanchez-Delgado, Alejandro De-la-O, Jorn W. Helge, Jonatan R. Ruiz

12 Citations (Scopus)

Abstract

Purpose: To analyze the diurnal variation of maximal fat oxidation (MFO) and the intensity that elicits MFO (Fat(max)) in trained male athletes. Methods: A total of 12 endurance-trained male athletes age 24.7 (4.1) y participated in the study. The authors measured MFO, Fat(max), maximum oxygen uptake (VO(2)max), and VO2 percentage at ventilatory threshold 2 with a graded exercise protocol performed on 2 days separated by 1 wk. One test was performed in the morning and the other in the afternoon. The authors assessed the participants' chronotype using the HOME questionnaire. Results: MFO and Fat(max) were greater in the afternoon than in the morning (Delta = 13%, P < .001 and Delta = 6%, P = .001, respectively), whereas there were similar VO(2)max and ventilatory threshold 2 in the morning, than in the afternoon test (Delta = 0.2%, P = .158 and Delta = 7%, P = .650, respectively). There was a strong positive association between VO(2)max and MFO in both morning and afternoon assessments (R-2 = .783, P = .001 and R-2 = .663, P < .001, respectively). Similarly, there was a positive association between VO(2)max and Fat(max) in both morning and afternoon assessments (R-2 = .406, P = .024 and R-2 = .414, P = .026, respectively). Conclusion: MFO and Fat(max) may partially explain some of the observed diurnal variation in the performance of endurance sports.

Original language	English
Journal	International Journal of Sports Physiology and Performance
Volume	14
Issue number	8
Pages (from-to)	1140-1146
ISSN	1555-0265
DOIs	https://doi.org/10.1123/ijspp.2018-0854
Publication status	Published - 2019

Keywords

Fat(max)
VO(2)max
circadian rhythm
resistance
fuel oxidation

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10.1123/ijspp.2018-0854

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@article{e7a5812ad5494952b4a103c766a43a26,

title = "Diurnal Variation of Maximal Fat-Oxidation Rate in Trained Male Athletes",

abstract = "Purpose: To analyze the diurnal variation of maximal fat oxidation (MFO) and the intensity that elicits MFO (Fat(max)) in trained male athletes. Methods: A total of 12 endurance-trained male athletes age 24.7 (4.1) y participated in the study. The authors measured MFO, Fat(max), maximum oxygen uptake (VO(2)max), and VO2 percentage at ventilatory threshold 2 with a graded exercise protocol performed on 2 days separated by 1 wk. One test was performed in the morning and the other in the afternoon. The authors assessed the participants' chronotype using the HOME questionnaire. Results: MFO and Fat(max) were greater in the afternoon than in the morning (Delta = 13%, P < .001 and Delta = 6%, P = .001, respectively), whereas there were similar VO(2)max and ventilatory threshold 2 in the morning, than in the afternoon test (Delta = 0.2%, P = .158 and Delta = 7%, P = .650, respectively). There was a strong positive association between VO(2)max and MFO in both morning and afternoon assessments (R-2 = .783, P = .001 and R-2 = .663, P < .001, respectively). Similarly, there was a positive association between VO(2)max and Fat(max) in both morning and afternoon assessments (R-2 = .406, P = .024 and R-2 = .414, P = .026, respectively). Conclusion: MFO and Fat(max) may partially explain some of the observed diurnal variation in the performance of endurance sports.",

keywords = "Fat(max), VO(2)max, circadian rhythm, resistance, fuel oxidation",

author = "Amaro-Gahete, {Francisco J.} and Lucas Jurado-Fasoli and Trivino, {Alejandro R.} and Guillermo Sanchez-Delgado and Alejandro De-la-O and Helge, {Jorn W.} and Ruiz, {Jonatan R.}",

year = "2019",

doi = "10.1123/ijspp.2018-0854",

language = "English",

volume = "14",

pages = "1140--1146",

journal = "International Journal of Sports Physiology and Performance",

issn = "1555-0265",

publisher = "Human Kinetics, Inc",

number = "8",

}

TY - JOUR

T1 - Diurnal Variation of Maximal Fat-Oxidation Rate in Trained Male Athletes

AU - Amaro-Gahete, Francisco J.

AU - Jurado-Fasoli, Lucas

AU - Trivino, Alejandro R.

AU - Sanchez-Delgado, Guillermo

AU - De-la-O, Alejandro

AU - Helge, Jorn W.

AU - Ruiz, Jonatan R.

PY - 2019

Y1 - 2019

N2 - Purpose: To analyze the diurnal variation of maximal fat oxidation (MFO) and the intensity that elicits MFO (Fat(max)) in trained male athletes. Methods: A total of 12 endurance-trained male athletes age 24.7 (4.1) y participated in the study. The authors measured MFO, Fat(max), maximum oxygen uptake (VO(2)max), and VO2 percentage at ventilatory threshold 2 with a graded exercise protocol performed on 2 days separated by 1 wk. One test was performed in the morning and the other in the afternoon. The authors assessed the participants' chronotype using the HOME questionnaire. Results: MFO and Fat(max) were greater in the afternoon than in the morning (Delta = 13%, P < .001 and Delta = 6%, P = .001, respectively), whereas there were similar VO(2)max and ventilatory threshold 2 in the morning, than in the afternoon test (Delta = 0.2%, P = .158 and Delta = 7%, P = .650, respectively). There was a strong positive association between VO(2)max and MFO in both morning and afternoon assessments (R-2 = .783, P = .001 and R-2 = .663, P < .001, respectively). Similarly, there was a positive association between VO(2)max and Fat(max) in both morning and afternoon assessments (R-2 = .406, P = .024 and R-2 = .414, P = .026, respectively). Conclusion: MFO and Fat(max) may partially explain some of the observed diurnal variation in the performance of endurance sports.

AB - Purpose: To analyze the diurnal variation of maximal fat oxidation (MFO) and the intensity that elicits MFO (Fat(max)) in trained male athletes. Methods: A total of 12 endurance-trained male athletes age 24.7 (4.1) y participated in the study. The authors measured MFO, Fat(max), maximum oxygen uptake (VO(2)max), and VO2 percentage at ventilatory threshold 2 with a graded exercise protocol performed on 2 days separated by 1 wk. One test was performed in the morning and the other in the afternoon. The authors assessed the participants' chronotype using the HOME questionnaire. Results: MFO and Fat(max) were greater in the afternoon than in the morning (Delta = 13%, P < .001 and Delta = 6%, P = .001, respectively), whereas there were similar VO(2)max and ventilatory threshold 2 in the morning, than in the afternoon test (Delta = 0.2%, P = .158 and Delta = 7%, P = .650, respectively). There was a strong positive association between VO(2)max and MFO in both morning and afternoon assessments (R-2 = .783, P = .001 and R-2 = .663, P < .001, respectively). Similarly, there was a positive association between VO(2)max and Fat(max) in both morning and afternoon assessments (R-2 = .406, P = .024 and R-2 = .414, P = .026, respectively). Conclusion: MFO and Fat(max) may partially explain some of the observed diurnal variation in the performance of endurance sports.

KW - Fat(max)

KW - VO(2)max

KW - circadian rhythm

KW - resistance

KW - fuel oxidation

U2 - 10.1123/ijspp.2018-0854

DO - 10.1123/ijspp.2018-0854

M3 - Journal article

C2 - 30702364

SN - 1555-0265

VL - 14

SP - 1140

EP - 1146

JO - International Journal of Sports Physiology and Performance

JF - International Journal of Sports Physiology and Performance

IS - 8

ER -

Diurnal Variation of Maximal Fat-Oxidation Rate in Trained Male Athletes

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Keywords

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