Next Article in Journal
Anti-Obesity Effects of Onion Extract in Zucker Diabetic Fatty Rats
Next Article in Special Issue
Insulinotropic and Muscle Protein Synthetic Effects of Branched-Chain Amino Acids: Potential Therapy for Type 2 Diabetes and Sarcopenia
Previous Article in Journal
Risk of Parenteral Nutrition in Neonates—An Overview
Previous Article in Special Issue
Exercise and Amino Acid Anabolic Cell Signaling and the Regulation of Skeletal Muscle Mass
Article Menu

Export Article

Open AccessArticle
Nutrients 2012, 4(10), 1504-1517; doi:10.3390/nu4101504

Effects of Egg White Protein Supplementation on Muscle Strength and Serum Free Amino Acid Concentrations

Department of Nutritional Science, Faculty of Applied Bio-Science, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya, Tokyo 156-8502, Japan
Faculty of Health and Nutrition, Bunkyo University, 1100 Gyouya, Chigasaki-City, Kanagawa 253-8550, Japan
Institute of Technology R&D Division, Kewpie Corporation, 5-13-1 Sumiyoshi-cho, Fuchu-City, Tokyo 183-0034, Japan
Tokyo Metropolitan Institute for Neuroscience, 2-1-6 Kamikitazawa, Setagaya, Tokyo 156-8506, Japan
Author to whom correspondence should be addressed.
Received: 30 July 2012 / Revised: 1 October 2012 / Accepted: 9 October 2012 / Published: 19 October 2012
View Full-Text   |   Download PDF [518 KB, uploaded 19 October 2012]   |  


The aim of this study was to evaluate the effects of egg white protein compared to carbohydrate intake prior to exercise on fat free mass (FFM), one repetition maximum (1RM) muscle strength and blood biochemistry in female athletes. Thirty healthy female collegiate athletes were recruited for this study and matched by sport type, body fat percentage and 1RM leg curl muscle strength. Participants were randomly divided into two groups: protein group (15.0 g egg white protein; 75 kcal) and carbohydrate group (17.5 g maltodextrin, 78 kcal). Supplements were administered daily at the same time in a double-blind manner prior to training during an 8-week period. Measurements were performed before and after the 8-week regimen. The mean dietary energy intake did not change throughout the study period. FFM and 1RM assessments (i.e., leg curl, leg extension, squat, and bench press) increased in both groups. Furthermore, serum urea and serum citrulline levels after the 8-week regimen increased significantly only in the protein group. Our findings indicated that compared to the carbohydrate supplement, the protein supplement was associated with some changes in protein metabolites but not with changes in body composition or muscle strength.
Keywords: egg white protein; muscle strength; female athletes; serum free amino acid; citrulline; urea egg white protein; muscle strength; female athletes; serum free amino acid; citrulline; urea
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Hida, A.; Hasegawa, Y.; Mekata, Y.; Usuda, M.; Masuda, Y.; Kawano, H.; Kawano, Y. Effects of Egg White Protein Supplementation on Muscle Strength and Serum Free Amino Acid Concentrations. Nutrients 2012, 4, 1504-1517.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Nutrients EISSN 2072-6643 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top