Physical and cognitive performance during long-term cold weather operations (original) (raw)

2005, Aviation, space, and environmental medicine

Physiological responses, physical performance, and cognitive performance were measured during military cold weather survival courses to determine the effects of long-term cold exposure on training safety and potential survival ability. There were 28 males, from 5 9-d winter survival courses, who participated. Cognitive performance was evaluated through logical reasoning, planning, and vigilance. Physical performance was evaluated with tests of hand function and arm strength. Subjective cold sensation scale (CSS), rating of perceived exertion (RPE), and mood indicators were quantified. Core temperature (T(core0) and HR were recorded continuously throughout the courses, and fingertip temperature (T(finger)) was also recorded during testing. Hematocrit values to indicate hydration status were obtained from blood samples taken on three occasions. Mean air temperature (T(air)) during the testing periods ranged from -24.4 to 4.4 degrees C among the five courses. Hydration level and T(core...

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