Reviewed By | Dr. Elizabeth Karmen Gregg
Reviewed By | Dr. Elizabeth Karmen Gregg
PhD in Integrative And Functional Medicine | Swolverine Medical Review Board
Dr. Karmen is a clinical nutritionist, researcher, and educator specializing in hormonal health and functional nutrition for women in the prenatal, postpartum, and reproductive stages. With over a decade of experience in clinical and academic settings, she integrates evidence-based science with patient-centered care to help women achieve optimal hormonal balance and lifelong wellness.

STUDY DESIGN

Double-Blind Controlled Trial

Author information The University of Tampa, Tampa FL Sharp M, Shields K, Lowery R, Lane J, Partl J, Holmer C, Minevich J, Souza E, Wilson J

BACKGROUND

The purpose of this study was to determine the effects of post-exercise consumption of two servings of whey isolate, compared to a maltodextrin control on lean mass and strength during 8 weeks of resistance training.

METHODS

Thirty college-aged, resistance-trained males and females were randomly assigned to one of the treatment groups. Subjects consumed two servings (46g) of whey protein isolate or maltodextrin. Subjects trained 5 days per week (3 resistance training, 2 cardio) for 8 weeks as a part of a daily undulating periodized resistance-training program. Two servings of protein were consumed immediately following exercise or at a similar time of day on off days. Dual-emission x-ray absorptiometry (DXA) was used to determine changes in body composition. Maximum strength was assessed by one-rep-max (1RM) for bench press (upper body) and deadlift (lower body). A two-way ANOVA with repeated measures model was used to identify the group, time, and group by time interactions. The significance level was set at p < 0.05

RESULTS

Whey protein isolate lead to a significant increase in lean body mass (4.7%) compared with baseline (p < 0.0001). Fat loss was also significantly decreased at 8 weeks compared to baseline for whey isolate at 8.3% respectively (p < 0.0001). 1RM both deadlift and bench-press were both significantly increased for all treatment groups when compared to baseline. Therefore whey protein isolate can help with optimizing body composition.

Whey Protein Isolate - Increases Lean Muscle Mass

Whey Protein Isolate - Decreases Body Fat

adapted from the Journal of the international society of sports nutrition

DOWNLOAD THE CLINICAL STUDY BELOW

More stories

Beta Alanine - Benefits On Improvement In Rowing Performance

Beta-Alanine: The Role Of Carnosine Levels And Exercise Performance In Rowing

Study Design Randomized controlled trial Author information dept. of Movement and Sports Sciences, Ghent Univ., Watersportlaan 2, B- 9000 Ghent,...

The Influence of Oral L-Glutamine Supplementation on Muscle Strength Recovery and Soreness Following Unilateral Knee Extension Eccentric Exercise.

The Influence of Oral L-Glutamine Supplementation on Muscle Strength Recovery and Soreness Following Unilateral Knee Extension Eccentric Exercise.

STUDY DESIGN Randomized double-blind controlled crossover study Author information School of Health and Human Performance, Division of Kinesiology,...