Whey protein consumption after resistance exercise reduces energy intake at a post-exercise meal

Monteyne, Alistair, Martin, Alex, Jackson, Liam, Corrigan, Nick, Stringer, Ellen, Newey, Jack, Rumbold, Penny, Stevenson, Emma and James, Lewis (2016) Whey protein consumption after resistance exercise reduces energy intake at a post-exercise meal. European Journal of Nutrition. ISSN 1436-6207 (In Press)

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Official URL: http://dx.doi.org/10.1007/s00394-016-1344-4

Abstract

Purpose - Protein consumption after resistance exercise potentiates muscle protein synthesis, but its effects on subsequent appetite in this context are unknown. This study examined appetite and energy intake following consumption of protein- and carbohydrate-containing drinks after resistance exercise.

Methods - After familiarisation, 15 resistance training males (age 21 ± 1 years, body mass 78.0 ± 11.9 kg, stature 1.78 ± 0.07 m) completed two randomised, double-blind trials, consisting of lower-body resistance exercise, followed by consumption of a whey protein (PRO 23.9 ± 3.6 g protein) or dextrose (CHO 26.5 ± 3.8 g carbohydrate) drink in the 5 min post-exercise. An ad libitum meal was served 60 min later, with subjective appetite measured throughout. Drinks were flavoured and matched for energy content and volume. The PRO drink provided 0.3 g/kg body mass protein.

Results - Ad libitum energy intake (PRO 3742 ± 994 kJ; CHO 4172 ± 1132 kJ; P = 0.007) and mean eating rate (PRO 339 ± 102 kJ/min; CHO 405 ± 154 kJ/min; P = 0.009) were lower during PRO. The change in eating rate was associated with the change in energy intake (R = 0.661, P = 0.007). No interaction effects were observed for subjective measures of appetite. The PRO drink was perceived as creamier and thicker, and less pleasant, sweet and refreshing (P < 0.05).

Conclusion - These results suggest whey protein consumption after resistance exercise reduces subsequent energy intake, and this might be partially mediated by a reduced eating rate. Whilst this reduced energy intake is unlikely to impair hypertrophy, it may be of value in supporting an energy deficit for weight loss.

Item Type: Article
Uncontrolled Keywords: Appetite, Energy balance, Weight management, Protein synthesis, Anabolism, Body composition
Subjects: B400 Nutrition
C600 Sports Science
Department: Faculties > Health and Life Sciences > School of Life Sciences > Sport, Exercise and Rehabilitation
Depositing User: Becky Skoyles
Date Deposited: 28 Nov 2016 10:01
Last Modified: 08 Sep 2017 20:02
URI: http://nrl.northumbria.ac.uk/id/eprint/28614

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