Water Vapor Loss from the Respiratory Tract during Outdoor Exercise in the Cold

摘要

The water vapor contained in oral expired air was collected during rest and exercise in a subarctic environment in 26 experiments on three men. Heat loss via this route was approximately 9％ of the total energy expenditure. Water vapor loss was directly proportional to ventilation volume. An average (B coefficient) of 32 milligrams of water was collected from each liter of expired air.