Diurnal Variation of Maximal Fat-Oxidation Rate in Trained Male Athletes
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Diurnal Variation of Maximal Fat-Oxidation Rate in Trained Male Athletes. / Amaro-Gahete, Francisco J.; Jurado-Fasoli, Lucas; Trivino, Alejandro R.; Sanchez-Delgado, Guillermo; De-la-O, Alejandro; Helge, Jorn W.; Ruiz, Jonatan R.
In: International Journal of Sports Physiology and Performance, Vol. 14, No. 8, 2019, p. 1140-1146.Research output: Contribution to journal › Journal article › Research › peer-review
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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
VL - 14
SP - 1140
EP - 1146
JO - International Journal of Sports Physiology and Performance
JF - International Journal of Sports Physiology and Performance
SN - 1555-0265
IS - 8
ER -
ID: 228530809