Abstract
Since the beginning of recorded history, man has been concerned about work-rest cycles. Studies of industrial fatigue date back to 1893 when the hours of work were reduced from 54 to 48 hours a week. Further reductions have brought us to a 40-hour work week with five days of work and two days of rest. Management recognizes the value of rest breaks and normally provides these in accordance with the type labor performed and environmental conditions.
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