Calculate the total evaporation of sweat necessary to prevent heat gain in the body given the following information: Total body energy expenditure = 250 Kcal
Exercise efficacy = 20%
Evaporation of 1000 ml of sweat results in 580 Kcal of heat loss
Therefore,the total evaporation of sweat necessary to prevent body heat gain in these conditions is:
A)0.276 liters
B)0.344 liters
C)0.166 liters
D)None of the above answers are correct

Question

Quizplus · Accepted Answer

Total energy expenditure = 250 Kcal
Exercise efficacy = 20% of 250 Kcal = 50 Kcal
To prevent heat gain, we need to lose 50 Kcal through evaporation of sweat.
Given, 1000 ml of sweat results in 580 Kcal of heat loss
Therefore, 50 Kcal of heat loss will require (1000/580) x 50 = 86.2 ml of sweat
Converting ml to liters, we get 0.0862 liters or approximately 0.344 liters. 
So, the best choice is B.

Calculate the Total Evaporation of Sweat Necessary to Prevent Heat