Comment on

• Rates of concussion are lower in National Football League games played at higher altitudes.

  Myer GD, Smith D, Barber Foss KD, Dicesare CA, Kiefer AW, Kushner AM, Thomas SM, Sucharew H, Khoury JC. Myer GD, et al. J Orthop Sports Phys Ther. 2014 Mar;44(3):164-72. doi: 10.2519/jospt.2014.5298. Epub 2014 Jan 28. J Orthop Sports Phys Ther. 2014. PMID: 24471872
• Altitude does not reduce concussion incidence in professional football players: a poor understanding of health statistics and altitude physiology.

  Zavorsky GS. Zavorsky GS. J Orthop Sports Phys Ther. 2014 Jun;44(6):458-9. doi: 10.2519/jospt.2014.0201. J Orthop Sports Phys Ther. 2014. PMID: 24881904 No abstract available.