• Global News
  • Press Releases
  • Publications
  • Clinical Study Of Mannatech’s Creatine-Free EM•PACT® Sports Drink Published In The Journal Of The International Society Of Sports Nutrition

     Professor Allyn Byars
    Professor Allyn Byars

    A randomized, double-blind, placebo-controlled, crossover trial investigating the effect of creatine-free EM•PACT sports drink on the aerobic performance of 29 healthy college students was published this week in the Journal of the International Society of Sports Nutrition [1] ( In this study, Dr. Allyn Byars and his colleagues showed that a single serving of creatine-free EM•PACT sports drink significantly improved subjects’ maximal oxygen consumption (VO2max), time to exhaustion and percentage estimated non-protein fat substrate utilization. This study provides confirmation that the creatine-free EM•PACT product, which meets the compliance standards of various athletic organizations that regulate the use of nutritional supplements, provides benefits comparable to the original EM•PACT product with creatine [2],[3]. Dr. Byars is an Associate Professor of Kinesiology at Angelo State University in San Angelo, TX. Drs. Susan Keith and Warren Simpson (Angelo State University), Andy Mooneyhan (Arkansas State University in State University, Arkansas) and Dr. Mike Greenwood (Baylor University in Waco, Texas) were co-authors.Study was at least partially funded by Mannatech.

    1. Byars A, Keith S, Simpson W, Mooneyhan A, Greenwood M: The influence of a pre-exercise sports drink (PRX) on factors related to maximal aerobic performance. J Int Soc Sports Nutr 2010, 7: 1-6.
    2. Byars A, Greenwood M, Greenwood L: The effectiveness of a pre-exercise performance drink (PRX) on indices of maximal cardiorespiratory fitness. J Int Soc Sports Nutr 2006, 3: 56-59.
    3. Byars A, Schneider KD, Hesseltine MC, Simpson WK, Greenwood M: Sports nutrition: comparing two sports drinks on aerobic performance. Appl Res Coach Athletics Ann 2007, 22: 226-240.
    Mar 29, 2010 at 3:08 pm | Publications