TY  - JOUR
PY  - 2013//
TI  - Thermal-Work Strain During Marine Rifle Squad Operations in Afghanistan
JO  - Military medicine
A1  - Welles, Alexander P.
A1  - Buller, Mark J.
A1  - Margolis, Lee
A1  - Economos, Demetri
A1  - Hoyt, Reed W.
A1  - Richter, Mark W.
SP  - 1141
EP  - 1148
VL  - 178
IS  - 10
N2  - The physiological burden created by heat strain and physical exercise, also called thermal-work strain, was quantified for 10 male Marines (age 21.9 ± 2.3 years, height 180.3 ± 5.2 cm, and weight 85.2 ± 10.8 kg) during three dismounted missions in Helmand Province, Afghanistan. Heart rate (HR) and core body temperature (Tcore) were recorded every 15 seconds (Equivital EQ-01; Hidalgo, Cambridge, United Kingdom) during periods of light, moderate, and heavy work and used to estimate metabolic rate. Meteorological measures, clothing characteristics, anthropometrics, and estimated metabolic rates were used to predict Tcore for the same missions during March (spring) and July (summer) conditions. Thermal-work strain was quantified from HR and Tcore values using the Physiological Strain Index (PSI) developed by Moran et al. July PSI and Tcore values were predicted and not observed due to lack of access to in-theater warfighters at that time. Our methods quantify and compare the predicted and observed thermal-work strain resulting from environment and worn or carried equipment and illustrate that a small increase in ambient temperature and solar load might result in increased thermal-work strain.<p /> <p>Language: en</p>
LA  - en
SN  - 0026-4075
UR  - http://dx.doi.org/10.7205/MILMED-D-12-00538
ID  - ref1
ER  -