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The effect of a whey protein supplement dose on satiety and food intake in resistance training athletes
Appetite
  • Kristen Mackenzie-Shalders, Bond University
  • Nuala Byrne, Bond University
  • Gary Slater, University of the Sunshine Coast
  • Neil King, Queensland University of Technology
Date of this Version
5-12-2015
Document Type
Journal Article
Publication Details

Citation only

Mackenzie-Shalders, Byrne, Slater, & King. (2015). The effect of a whey protein supplement dose on satiety and food intake in resistance training athletes. Appetite, 92, 178-184.

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© Copyright, 2015 Elsevier Ltd, 2015

2015 HERDC Submission

Abstract

Objective: Many athletes perform resistance training and consume dietary protein as a strategy to promote anabolic adaptation. Due to its high satiety value, the regular addition of supplemented dietary protein could plausibly displace other key macronutrients such as carbohydrate in an athlete's diet. This effect will be influenced by the form and dose of protein. Therefore, this study assessed the impact of liquid whey protein dose manipulation on subjective sensations of appetite and food intake in a cohort of athletes. Design: Ten male athletes who performed both resistance and aerobic (endurance) training (21.2 ± 2.3 years; 181.7 ± 5.7 cm and 80.8 ± 6.1 kg) were recruited. In four counter-balanced testing sessions they consumed a manipulated whey protein supplement (20, 40, 60 or 80 g protein) 1 hour after a standardised breakfast. Subsequent energy intake was measured 3 hours after the protein supplement using an ad libitum test meal. Subjective appetite sensations were measured periodically during the test day using visual analogue scales. Results: All conditions resulted in a significant decrease in ratings of hunger (50-65%; P < 0.05) at the time of supplement consumption. However, there were no significant differences between the conditions at any time point for subjective appetite sensations or for energy consumed in the ad libitum meal: 4382 ± 1004, 4643 ± 982, 4514 ± 1112, 4177 ± 1494 kJ respectively. Conclusion: Increasing whey protein supplement dose above 20 g did not result in a measurable increase in satiety or decrease in food intake. However, the inclusion of additional whey protein supplementation where not otherwise consumed could plausibly reduce dietary intake.

Citation Information
Kristen Mackenzie-Shalders, Nuala Byrne, Gary Slater and Neil King. "The effect of a whey protein supplement dose on satiety and food intake in resistance training athletes" Appetite Vol. 92 (2015) p. 178 - 184 ISSN: 0195-6663
Available at: http://works.bepress.com/nuala_byrne/31/