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BioMed Central, Journal of the International Society of Sports Nutrition, 1(11), 2014

DOI: 10.1186/1550-2783-11-36

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Effects of soluble milk protein or casein supplementation on muscle fatigue following resistance training program: a randomized, double-blind, and placebo-controlled study

Journal article published in 2014 by Nicolas Babault ORCID, Pascale Le Ruyet, Gaëlle Deley, Pascale Le Ruyet, François Morgan, François André Allaert
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

BACKGROUND: The effects of protein supplementation on muscle thickness, strength and fatigue seem largely dependent on its composition. The current study compared the effects of soluble milk protein, micellar casein, and a placebo on strength and fatigue during and after a resistance training program. METHODS: Sixty-eight physically active men participated in this randomized controlled trial and underwent 10 weeks of lower-body resistance training. Participants were randomly assigned to the Placebo (PLA), Soluble Milk Protein (SMP, with fast digestion rate) or Micellar Casein (MC, with slow digestion rate) group. During the 10-week training period, participants were instructed to take 30 g of the placebo or protein twice a day, or three times on training days. Tests were performed on quadriceps muscles at inclusion (PRE), after 4 weeks (MID) and after 10 weeks (POST) of training. They included muscle endurance (maximum number of repetitions during leg extensions using 70% of the individual maximal load), fatigue (decrease in muscle power after the endurance test), strength, power and muscle thickness. RESULTS: Muscle fatigue was significantly lower (P