A study of the energy expenditure of scrubbing

Summary

• 1. A method is described for recording the pressure and traction applied in the work of scrubbing.

• 2. Using the method of indirect calorimetry it was found that the nett cost of scrubbing in the standing position was about 80 Calories per qm./hour in the trained person, and about 95 Cals./qm./hour in the untrained person. With kneeling scrubbing both averages were 100 Cals./qm./hour.

• 3. When this is related to the work done in Kilos pressure and traction, it is found that (in confirmation of common experience) the untrained subjects do considerably less work than the trained.

• 4. Variations in cost per Kilo of work done during the period of work probably depend on the force exerted previously, and thus a steady metabolic rate is maintained.

• 5. There is no evidence of development of fatigue during the period of scrubbing.

• 6. It would therefore be quite possible for the rate of work employed to be continued throughout the day, though it is inadmissible to suppose that the workers wouldnecessarily maintain it.