Open Access

Erratum to: The influence of a CYP1A2 polymorphism on the ergogenic effects of caffeine

  • Christopher J Womack1Email author,
  • Michael J Saunders1,
  • Marta K Bechtel2,
  • David J Bolton1,
  • Michael Martin1,
  • Nicholas D Luden1,
  • Wade Dunham2 and
  • Melyssa Hancock2
Journal of the International Society of Sports Nutrition201512:24

https://doi.org/10.1186/s12970-015-0079-6

Received: 7 October 2014

Accepted: 20 October 2014

Published: 30 May 2015

The original article was published in Journal of the International Society of Sports Nutrition 2012 9:7

Correction

Following publication of this article [1], we recently noticed that two subjects in this study were not assigned to the correct genetic groups. One of the AA homozygotes was incorrectly entered as a C allele carrier and we had the opposite situation for a second subject.

We have re-run the primary statistical analysis with the subjects assigned to their correct groups. The corrected analysis produced very similar results to our initial, published findings as we observed a significant treatment effect and a significant genotype x treatment interaction due to a higher degree of response in the AA homozygotes.

Correcting our dataset did result in very slight differences in the mean values for 40 k time. The changes are presented in Table 1.
Table 1

.

Genotype

Placebo

Caffeine

A. Original Data: 40-km cycling time for Placebo and Caffeine conditions for AA homozygotes and C-allele carriers

AA

76.1 +/- 5.8 min

72.4 +/- 4.2 min

C

72.2 +/- 4.2 min

70.4 +/- 4.3 min

B. Corrected Data: 40-km cycling time for Placebo and Caffeine conditions for AA homozygotes and C-allele carriers

AA

75.1 +/- 6.1 min

71.6 +/- 4.3 min

C

73.1 +/- 4.5 min

71.6 +/- 4.4 min

Notes

Authors’ Affiliations

(1)
Department of Kinesiology, Human Performance Laboratory, James Madison University
(2)
Department of Biology, James Madison University

References

  1. Womack D et al. The influence of a CYP1A2 polymorphism on the ergogenic effects of caffeine. J Int Soc Sports Nutri. 2012;9:7.View ArticleGoogle Scholar

Copyright

© Womack et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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