An American schoolteacher who moved to Finland in 2014 was skeptical of the Finnish practice of giving students 15 minutes of free time every hour. Until he tried it. He was astounded when they went from dragging their feet to having a bounce in their step and more focus in their studies. The makers of DeskTime, a software that tracks employee time use, studied the habits of the most productive 10% of their 36,000-employee user base. The surprising results? They work for 52 minutes then break for 17 on average. They treat the 52 minutes like a sprint. During the break they tend to go for a walk or tune out, rather than checking e-mail or Facebook.
-Reader's Digest