No difference in fat oxidation, postexercise energy expenditure or energy intake following ingestion of a protein-based breakfast compared to carbohydrate breakfast.
Nutr Health
; : 2601060241241359, 2024 Mar 28.
Article
em En
| MEDLINE
| ID: mdl-38545628
ABSTRACT
Background:
Manipulation of macronutrient intake and exercise can alter overall energy consumption and potentially body composition.Aim:
The purpose of this study was to manipulate the macronutrient content of breakfast before exercise to investigate the impact on exercise energy expenditure and postexercise energy intake (EI).Methods:
Twelve active men were recruited, 11 finished the study protocol (age 28 ± 9 years; VO2max 56 ± 5â ml·kg-1·min-1). In a randomized crossover design, each participant completed 4 trials, 3 consisting of a specific breakfast (protein, PRO; carbohydrate, CHO; noncaloric; NON-CAL) followed in 1â h by a 45â minutes moderate intensity treadmill exercise protocol. The fourth trial consisted of breakfast and no exercise (CON). An ad-libitum lunch and food for the rest of the day were provided and assessed for EI. Measures included resting metabolic rate pre- and postbreakfast along with oxygen uptake (VO2) during and after exercise, along with hunger scales, and blood measures of glucose, insulin and plasma-PYY prebreakfast, pre-exercise, postexercise, and 60 minutes postexercise.Results:
Fat oxidation was highest during exercise in the NON-CAL (0.57â g·min-1) trial with similar levels of fat oxidation between PRO (0.50â g·min-1) and CHO trials (0.48â g·min-1). Hunger was not affected by PRO intake or exercise, nor was appetite hormones and glucose. EI at lunch and dinner was not significantly different between trials.Conclusion:
Pre-exercise PRO intake did not modify fat oxidation during exercise, did not lead to a larger VO2 versus CHO, nor did it attenuate EI postexercise.
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Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article