The Journal of Strength and Conditioning Research has retracted the article entitled “CrossFit-based High Intensity Power Training Improves Maximal Aerobic Fitness and Body Composition” by Smith, MM, Sommer, AJ, Starkoff, BE, and Devor, ST, published in the November 2013 issue of the Journal of Strength and Conditioning Research (Vol. 27, pp. 3159 - 3172). The Journal of Strength and Conditioning Research was advised on May 4, 2017 by one of the authors that the study was not conducted under an IRB approved protocol for that study, as was stated in the article. Because the study was performed without proper IRB approval, the article has been retracted.
This retraction follows the October 2015 erratum which stated that “after the article was published, 10 of the 11 participants who did not complete the study have provided their reasons for not finishing, with only 2 mentioning injury or health conditions that prevented them from completing follow-up testing.” The injury and health conditions that prevented the participants from completing follow-up testing were not caused by participation in the CrossFit-related study, and a federal judge ruled in September of 2016 that the injury data reported by the authors in the article was false.
Smith MM, Sommer AJ, Starkoff BE, Devor ST. Crossfit-based high intensity power training improves maximal aerobic fitness and body composition. J Strength Cond Res 27: 3159–3172, 2013.