A physical worker can do more work if he takes more time out for rest. Frederick Taylor demonstrated that while working as a scientific management engineer with the Bethlehem Steel Company.

如果他花更多的时间休息，体力劳动者可以做更多的工作。弗雷德里克·泰勒 (Frederick Taylor) 在伯利恒钢铁公司担任科学管理工程师时证明了这一点。