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2007, Piran, Slovenia

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Occupational Thermal Problems<br />

corresponded to Howley’s ‘moderate’ intensity zone. There was a tendency (p=0.07) for the<br />

afternoon bout to have a higher mean %HRR compared to the morning bout; a difference<br />

equating to 3 ±5 %HRR. However, when the data were expressed as amount of time the<br />

participants spent working in Howley’s different zones of intensity, there was no difference<br />

between bouts (p=0.20). The greatest amount of time was spent in the light (20-39 %HRR)<br />

and moderate (40-59 %HRR) intensity zones. There was no difference between bouts for<br />

mean fluid intake, estimated sweat loss and estimated sweat rate (0.007 L.min -1 ). Of note,<br />

participants began the afternoon bout with a significantly lower body mass compared to the<br />

morning bout (-0.4 ±0.5 kg, p

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