In the context of global aging, the health risk factors associated with exercising or working in the heat for aging population are exacerbated by the rising in global surface temperatures. The purpose of this investigation is to determine at what age the heat loss decrements occur and to examine if aerobic fitness level can affect the heat loss capacity in neutral environmental conditions.
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Aerobic fitness level
Timeframe: Through study completion (a shuttle run test), an average of 15 minutes
Change from baseline ear canal temperature
Timeframe: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Change from baseline axillary temperature
Timeframe: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Physical activity levels
Timeframe: Once before the shuttle run test
Change from baseline body weight
Timeframe: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Change from baseline whole Body Sweat Rate
Timeframe: Change from baseline to the end of study completion (a shuttle run test), an average of 15 minutes
Air temperature
Timeframe: Up to 30 minutes, during a one complete shuttle run test
Relative humidity
Timeframe: Up to 30 minutes, during a one complete shuttle run test