Accelerometry and salivary cortisol response during Air Force Special Tactics Officer selection.
BACKGROUND
Special Tactics Officer (STO) selection is conducted to select officers to enter the combat controller training pipeline. The aims were to determine physical activity patterns, estimate energy expenditure, and identify whether return and/or unsuccessful candidates demonstrated differences in cortisol responses compared to non-selected and/or first-time attendees.


METHODS
Participants completed the STO selection, consisting of 5 days of physical and mental challenges. Participants were equipped with ActiCals®, and saliva samples were collected throughout the STO selection.


RESULTS
Average activity counts were 684 ± 200 counts∙min-1, with no group differences. Estimated energy expenditure was 4,105 ± 451 kcal∙day-1. Cortisol was elevated following extended physical training but returned to baseline during rest. Return candidates had significantly lower cortisol responses compared to first-timers, 0.43 ± 0.06 μg∙dl-1 versus 0.76 ± 0.18 μg∙dl-1, respectively, p < 0.05.


CONCLUSIONS
An individual's salivary cortisol response to the stresses incurred during the STO selection has the potential to be incorporated into the entire picture of a candidate's performance and ability to handle stress.
Department of HHP McGill Hall, The University of Montana, Center for Work Physiology and Exercise Metabolism, 32 Campus Drive, Missoula, MT 59812, USA. brent.ruby@mso.umt.edu.
John S
JS
Cuddy
Andrew R
AR
Reinert
Walter S
WS
Hailes
Dustin R
DR
Slivka
Brent C
BC
Ruby