Motorists on the road are advised to take breaks when embarking on long journeys or to be well rested before they even get on the road. It is not recommended to just go on and on in the name of arriving on time, because chances may be that one may not arrive at all. Just as vehicles stop to refuel, the body also needs rest from time to time.
This is exactly the same advice one would give to all those working in farms or those in charge of people who are working in farms. There are certain levels of continuous work and effort that the body just cannot take. The need to beat set targets and meet deadlines should come after the wellbeing of the mind and the body. Concentration levels are known to take a dip when one stays on a single task for too long. And the lack of maximum concentration on the task at hand will almost always translate into mistakes and consequentially, poor performance.
Moving with speed in important but not at the expense of one’s health. Taking time to refresh and recharge helps to maintain a certain desirable level of performance and allows the body to do more. At the end of the day it is the more about the quality of work done rather than the quantity of it. 100 fully and well baked cake are better and worth more than a thousand half baked ones.