Received: 11 June 2019
Accepted: 8 May 2020
First Online: 26 May 2020
Ethics approval and consent to participate
: The study was a retrospective, observational cohort design that evaluated subjects after exposure to a medically diagnosed concussion. The study was approved by the Duke University institutional review board. Due to the retrospective nature of the study, consent to participate was not obtained.
: Not applicable.
: Dr. Chad Cook is an editor for well-known research journals. Additionally, Dr. Cook receives paid royalties for his published videos and books. The results of this study do not constitute endorsement by the ACSM. The authors declare that the results of this study are presented clearly, honestly, and without fabrication, falsification, or inappropriate data manipulation. The remaining authors declare no competing interests.