Substituting carbohydrate at lunch for added protein increases fat oxidation during subsequent exercise in healthy males.
J Clin Endocrinol Metab
; 2024 Apr 13.
Article
en En
| MEDLINE
| ID: mdl-38609167
ABSTRACT
CONTEXT How pre-exercise meal composition influences metabolic and health responses to exercise later in the day is currently unclear. OBJECTIVE:
Examine the effects of substituting carbohydrate for protein at lunch on subsequent exercise metabolism, appetite, and energy intake.METHODS:
Twelve healthy males completed three trials in randomized, counterbalanced order. Following a standardized breakfast (779 ± 66 kcal; â¼0815), participants consumed a lunch (1186 ± 140 kcal; â¼1315) containing either 0.2 g·kg-1 carbohydrate and â¼2 g·kg-1 protein (LO-CARB), 2 g·kg-1 carbohydrate and â¼0.4 g·kg-1 protein (HI-CARB), or fasted (FAST). Participants later cycled at â¼60% VÌO2peak for 1 h (â¼1615) and post-exercise ad-libitum energy intake was measured (â¼1830). Substrate oxidation, subjective appetite, and plasma concentrations of glucose, insulin, non-esterified fatty acids (NEFA), peptide YY (PYY), glucagon-like peptide-1 (GLP-1), and acylated ghrelin (AG) were measured for 5 h post-lunch.RESULTS:
Fat oxidation was greater during FAST (+11.66 ± 6.63 g) and LO-CARB (+8.00 ± 3.83 g) than HI-CARB (p < 0.001), with FAST greater than LO-CARB (+3.67 ± 5.07 g; p < 0.05). NEFA were lowest in HI-CARB and highest in FAST, with insulin demonstrating the inverse response (all p < 0.01). PYY and GLP-1 demonstrated a stepwise pattern, with LO-CARB greatest and FAST lowest (all p < 0.01). AG was lower during HI-CARB and LO-CARB versus FAST (p < 0.01). Energy intake in LO-CARB was lower than FAST (-383 ± 233 kcal; p < 0.001) and HI-CARB (-313 ± 284 kcal; p < 0.001).CONCLUSION:
Substituting carbohydrate for protein in a pre-exercise lunch increased fat oxidation, suppressed subjective and hormonal appetite, and reduced post-exercise energy intake.
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Base de datos:
MEDLINE
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En
Revista:
J Clin Endocrinol Metab
Año:
2024
Tipo del documento:
Article