Poster Topical Area: Sports Nutrition

Location: Auditorium

Poster Board Number: 237

P25-006 - Examination of Effect of Pre-Bedtime Ingestion Of Whey Concentrate And Pea Protein Supplements On Changes In Energy Expenditure, Satiety, And Mood

Sunday, Jun 10
8:00 AM – 6:00 PM

Objective: Obesity is now classified as a global epidemic with over 2 billion adults being overweight/obese currently. Exercise along with a healthful diet play a major role in the prevention and regression of obesity. Particularly, high-protein diets have been shown to be efficacious for rapid, more sustained weight loss. Furthermore, protein supplementation supports achieving such an intake, and the option for other types aside from dairy- and soy-based proteins has lead to more research investigating the effectiveness of pea-based supplements. Thus, we carried out a counterbalanced, single-blinded crossover study to assess whether a load of pea protein prior to bedtime has an advantage over whey protein with regard to satiety, resting energy expenditure (REE), and urinary nitrogen output in college aged males and females.

Methods: We recruited 15 individuals on the California State Polytechnic University, Pomona campus to consume 30 minutes before bedtime a 16 oz drink of either 30g pea protein isolate or whey protein concentrate. Both supplement drinks were prepared by the researchers and matched for macronutrients, taste, viscosity, and color. The following morning, satiety and mood (measured using a visual analog scale in millimeters), and indirect calorimetry (using a metabolic cart) were assessed and urine collected for urea nitrogen assessment. REE was performed for one hour in each subject for each supplement.

Results: Thus far having 7 participants assessed, our data indicate the probability that the pea protein isolate may have a greater effect on consumers feeling less hungry in comparison to whey protein; 35.1 vs. 41.57 mm, respectively. The completed data set will be reported in the final poster form once the study is done.

Conclusions: Such an effect could be advantageous for those who are “early-morning exercisers” who wish not to eat prior to training and thus help support weight loss during this fasting period.



Funding Source: MENTORES (Mentoring, Educating, Networking, and Thematic Opportunities for Research in Engineering and Science) at California State Polytechnic University, Pomona

Marcus L. Elam

Assistant Professor
California State Polytechnic University, Pomona
Upland, California