Skip to main content
padlock icon - secure page this page is secure

Modeling Physiological Responses to Military Scenarios: Initial Core Temperature and Downhill Work

Buy Article:

$27.00 + tax (Refund Policy)

Yokota M, Berglund LG, Santee WR, Buller MJ, Hoyt RW. Modeling physiological responses to military scenarios: initial core temperature and downhill work. Aviat Space Environ Med 2005; 76:475–480.

Introduction: Previous field studies suggested that a thermoregulatory model developed by the U.S. Army Research Institute of Environmental Medicine (USARIEM) needed an adjustment of initial core temperature (Tcr) for individual variation and a metabolic (M) correction during downhill movements. This study evaluated the updated version of the model incorporating these new features using a dataset collected during U.S. Marine Corps marksmanship training at Quantico, VA. Methods: Individual anthropometrics, physiological, and environmental time series data were obtained from five Marine men. The study focused on the marksmanship training for approximately 2 h, then 30-min marching including uphill and downhill movements in a moderately hot environment (air temperature: ∼30°C; dew point: ∼21°C). The predicted and observed heart rate (HR) and Tcr measurements were compared by root mean square deviations (RMSD). Results: Overall, the current model improved predictions of physiological measures (HR RMSD = 23 bpm, Tcr RMSD = 0.46°C), particularly for marching in the heat (HR RMSD = 21 bpm, Tcr RMSD = 0.32°C). The model under-predicted both HR and Tcr during marksmanship training, indicating that a greater solar effect or non-thermal factors may have required higher M rates during these periods. Conclusions: Updated features of the model significantly improved physiological predictions. However, accurate M estimates are required for slow movements of subjects under heat stress, such as movements on the firing range. Such improvement should result in more accurate simulations of physiological status and better risk assessment, thereby reducing heat injuries and improving performance of deployed military personnel.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: core temperature; heart rate; heat stress; marksmanship training; metabolic rate; modeling

Document Type: Short Communication

Publication date: May 1, 2005

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more