Fig. 4From: Cardiovascular and thermal strain during 3–4 days of a metabolically demanding cold-weather military operationObserved (mean ± S.D.) and predicted change in pill (a), chest (b), and calf (c) temperatures vs. time during 10-h ski march in −6.1 °C air temperature. Predicted values were calculated using the 6-CTM thermoregulatory modelBack to article page