Abstract
Abstract Schedules of working and resting periods were designed separately for work at 40% [Vdot] O2maxand for work at 60% [Vdot] O2max each under the two following ambient conditions: (a) warm-humid, T db 36°C, T wb31°C and; (b) hot-dry, T db50°C, T wb25°C. Two conditions were provided for the resting period: (1) under the same ambient conditions as for the working conditions: (2) under neutral ambient conditions of T db 23°C, T wb 16°C. The working periods were determined by the total sum of the expected work specific heart rate (HR) and the expected heat induced increments in HR. The total sum of the HR was treated in terms of its equivalence to the fraction of [Vdot] O2max, based on the linear relationship between the two parameters. The limiting factor was taken to be the lower end of the 95th percentile maximal HR for the population of the 20–30 yr old participants. Six heat acclimatized male subjects participated in testing the adequacy of the design of the work and rest periods. The schedule of wo...
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