The effect of a whey protein supplement dose on satiety and food intake in resistance training athletes.

Authors:
Nuala M Byrne
Nuala M Byrne
Queensland University of Technology
Australia
Gary J Slater
Gary J Slater
Australian Institute of Sport
Australia
Neil A King
Neil A King
Institute of Health and Biomedical Innovation

Appetite 2015 Sep 12;92:178-84. Epub 2015 May 12.

Institute of Health and Biomedical Innovation, School of Exercise and Nutrition Sciences, Queensland University of Technology, Brisbane, Australia.

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.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.appet.2015.05.007DOI Listing

Still can't find the full text of the article?

We can help you send a request to the authors directly.
September 2015
43 Reads

Publication Analysis

Top Keywords

whey protein
20
protein supplement
16
food intake
12
protein
9
dietary protein
8
subjective appetite
8
appetite sensations
8
resistance training
8
supplement dose
8
supplement
5
whey
5
intake
5
libitum test
4
supplement libitum
4
intake measured
4
subsequent energy
4
energy intake
4
test meal
4
measured hours
4
hours protein
4

Similar Publications