Homework #6 Energy Expenditure Calculations
Calculation of Energy Expenditure: Homework 1
An average-sized individual (154 lb) works for 1 hour, of which 10 minutes was whole body light work while standing and 50 minutes of light work using both arms while standing. Use Table 1 and Figure 1 to determine the following quantities:
- (7 points) Determine the energy expenditure of an average-sized individual (154 lb).
- (3 points) Using the provided graph (Figure 1), provide the recommended work-rest regimen for the average-sized individual (154 lb), given that the working environment is 31°C (Show your work on Figure 1).
- (2 point ) Below what approximate temperature can this average-sized worker work continuously (Show your work on Figure 1)?
Show your calculations below. No credit if work is not shown.
From Table V-3:
Standing: 0.6 kcal/min * 10 min = 6 kcal
Whole Body Work, light work: 5.0 kcal/min * 10 min = 50 kcal
Basal Metabolism: 1.0 kcal/min * 10 min = 10 kcal
Standing: 0.6 kcal/min * 50 min = 30 kcal
Light Work both arms 1.5 kcal/min * 50 min = 75 kcal
Basal Metabolism: 1.0 kcal/min * 50 min = 50 kcal
Total 221 kcal
From Figure 1, the recommended work-rest regimen cycle is 50% work-50% rest.
The approximate temperature below which this worker can work continuously is 29.5 °C.
Homework Problem 2
- (3 points) Determine how much energy would a 200 lb individual expend, given the same work parameters? (round to two decimal places).
- (3 points) What is the work-rest regimen for this 200 lb worker at 31°C (Show your work on Figure 1)?
- (2 points) Below what approximate temperature can this 200 lb worker work continuously (Show your work on Figure 1)?
Show your calculations below. No credit if work is not shown.
If you run out of space, write answer(s) on back of this sheet
From Figure 1, the recommended work-rest regimen cycle is 25% work-75% rest.
The approximate temperature below which this worker can work continuously is 28°C.