Imagine that you live in a developing country and you earn your income through working as a labourer. Your profession requires you to carry heavy stuff from one place to another. Or you are a construction worker who spends his work day doing all the physical activities that are required by such a profession. You can also be a gardener who is mowing lawns and cutting trees to get paid. The question is what you do when the lunch break arrives.
Most probably I would take some rest under the shade or sun (depending on the weather) but I would never even think of playing a physical sport like soccer or rugby during that hour. Otherwise, I am almost guaranteed to slack off the remaining hours of work after the break. After all, how many of us really lift more weights after our arms and legs are extremely tired from finishing the exercise sets in the gym?
If we think about it, this is exactly we are doing in the modern high skills jobs. A worker in a knowledge economy works for four hours in the morning which requires aligning up our deep thoughts to accomplish the tasks for that day and often staring on a computer screen. After getting mentally exhausted by lifting these heavy `weights’, we exert our mind more on the social media and screens. These outlets, though pleasurable to us, still involve the mind. Instead, a physical activity like an outdoor walk, a little exercise and some offline chatting contribute towards a better refreshing break.