Table of Contents
ISRN Nutrition
Volume 2014 (2014), Article ID 149549, 5 pages
Clinical Study

Efficacy of a Botanical Supplement with Concentrated Echinacea purpurea for Increasing Aerobic Capacity

1School of Kinesiology, University of Louisiana at Lafayette, 225 Cajundome Blvd, Lafayette, LA 70506, USA
2School of Physical Education, Sport & Exercise Science, Ball State University, 2000 W. University Ave, Muncie, IN 47306, USA

Received 23 September 2013; Accepted 3 November 2013; Published 16 January 2014

Academic Editors: B. Knechtle, V. Pialoux, and L. Zeng

Copyright © 2014 David Bellar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present investigation evaluated the efficacy of a botanical supplement that delivered a concentrated dose of Echinacea purpurea (8 grams day−1). The participants were 13 apparently healthy, recreationally active college students (VO2 max: 51 mL O2/kg*min). The participants were provided with a 30-day supplementation regime. Data regarding maximum aerobic capacity was collected through pre- and posttesting surrounding the 30-day supplementation regime. The participants were instructed to maintain normal levels of physical activity and exercise during the experimental period. The levels of physical activity and exercise were monitored via the Leisure and Physical Activity Survey. The participants did not report any significant increases in aerobic physical activity or exercise during the supplementation period. Paired samples t-test analysis did not reveal a significant difference in maximum aerobic capacity, , . Presupplementation maximum aerobic capacity ( , ) was similar to postsupplementation values ( , ). This study suggests that botanical supplements containing a concentrated dose of Echinacea purpurea is not an effective intervention to increase aerobic capacity of recreationally active individuals.