In hot and humid environments, humans lose how many liters of sweat per hour?

In hot and humid environments, humans lose how many liters of sweat per hour?

• A. 0.5 liter per hour
• B. 3 liters per hour
• C. 1-2 liters per hour
• D. 4 liters per hour

Answer: (C)

Sweat rate during strenuous work in hot, humid environments typically falls in the 1–2 liters per hour range. The body increases sweat production to shed heat, but high humidity slows evaporation, so cooling is less efficient even as you continue to sweat. This combination leads to substantial but usually not extreme fluid loss over an hour. Individual factors like fitness, acclimation, clothing, and exertion level can shift the rate, but 1–2 liters per hour is the standard range used for expectations and training discussions.

Sweat rate during strenuous work in hot, humid environments typically falls in the 1–2 liters per hour range. The body increases sweat production to shed heat, but high humidity slows evaporation, so cooling is less efficient even as you continue to sweat. This combination leads to substantial but usually not extreme fluid loss over an hour. Individual factors like fitness, acclimation, clothing, and exertion level can shift the rate, but 1–2 liters per hour is the standard range used for expectations and training discussions.