Response: Is High-Intensity Functional Training (HIFT)/CrossFit Safe for Military Fitness Training?. Issue 1 (1st January 2017) - Poston, Walker S.C.; Haddock, Christopher K.; Heinrich, Katie M.; Jahnke, Sara A.; Jitnarin, Nattinee; Batchelor, David B.; Feito, Yuri; Suminski, Richard R.