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Lookup NU author(s): Dr Dean AllertonORCiD, Dr Daniel WestORCiD, Professor Emma Stevenson
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Purpose: Acute submaximal exercise and whey protein supplementation have been reported to improve postprandial metabolic and appetite responses to a subsequent meal independently. We aimed to examine the combination of these strategies on postprandial responses to a carbohydrate-rich breakfast.Methods: Twelve centrally obese males (age 41 ± 3 years, waist circumference 123.4 ± 2.9 cm), completed three trials in a single-blind, crossover design. Participants rested for 30 min (CON) or completed 30 min low-moderate-intensity treadmill walking (51 ± 1% [Formula: see text]) followed immediately by ingestion of 20 g whey protein (EX + PRO) or placebo (EX). After 15 min, a standardised breakfast was consumed and blood, expired gas and subjective appetite were sampled postprandially. After 240 min, an ad libitum lunch meal was provided to assess energy intake.Results: During EX + PRO, post-breakfast peak blood glucose was reduced when compared with EX and CON (EX + PRO: 7.6 ± 0.4 vs EX: 8.4 ± 0.3; CON: 8.3 ± 0.3 mmol l-1, p ≤ 0.04). Early postprandial glucose AUC0-60 min was significantly lower under EX + PRO than EX (p = 0.011), but not CON (p = 0.12). Over the full postprandial period, AUC0-240 min during EX + PRO did not differ from other trials (p > 0.05). Peak plasma insulin concentrations and AUC0-240 min were higher during EX + PRO than CON, but similar to EX. Plasma triglyceride concentrations, substrate oxidation and subjective appetite responses were similar across trials and ad libitum energy intake was not influenced by prior fasted exercise, nor its combination with whey protein supplementation (p > 0.05).Conclusion: Following fasted low-moderate-intensity exercise, consuming whey protein before breakfast may improve postprandial glucose excursions, without influencing appetite or subsequent energy intake, in centrally obese males.
Author(s): Allerton DM, West DJ, Stevenson EJ
Publication type: Article
Publication status: Published
Journal: European Journal of Nutrition
Year: 2021
Volume: 60
Pages: 999-1011
Print publication date: 01/03/2021
Online publication date: 22/06/2020
Acceptance date: 08/06/2020
Date deposited: 08/12/2020
ISSN (print): 1436-6207
ISSN (electronic): 1436-6215
Publisher: Springer
URL: https://doi.org/10.1007/s00394-020-02304-2
DOI: 10.1007/s00394-020-02304-2
PubMed id: 32572617
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