Whey protein consumption following fasted exercise reduces early postprandial glycaemia in centrally obese males: a randomised controlled trial.
Study Goal
The researchers aimed to examine whether combining acute submaximal exercise with whey protein supplementation improves postprandial metabolic and appetite responses to a carbohydrate-rich breakfast in centrally obese males.
Results Summary
The study found that consuming whey protein after exercise reduced post-breakfast peak blood glucose compared to exercise alone or no intervention, without affecting appetite or subsequent energy intake.
Population
Twelve centrally obese males (age 41 ± 3 years, waist circumference 123.4 ± 2.9 cm).
Effective Dosage
20 g whey protein ingested immediately after exercise.
Duration
Single intervention session with postprandial monitoring for 240 minutes.
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
whey protein supplementation | increase | postprandial metabolic and appetite responses | - | - | improve | #1 |
Acute submaximal exercise | increase | postprandial metabolic and appetite responses | - | - | improve | #2 |
30 min low-moderate-intensity treadmill walking followed immediately by ingestion of 20 g whey protein | decrease | post-breakfast peak blood glucose | centrally obese males | 7.6 ± 0.4 vs 8.4 ± 0.3; 8.3 ± 0.3 mmol l | reduced | #3 |
consuming whey protein before breakfast | increase | postprandial glucose excursions | centrally obese males | - | improve | #4 |
consuming whey protein before breakfast | no change | appetite | centrally obese males | - | without influencing | #5 |
consuming whey protein before breakfast | no change | subsequent energy intake | centrally obese males | - | without influencing | #6 |
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 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. TRIAL REGISTRATION NUMBER: NCT02714309.