An obvious "smoker" who needs a smoke break, came up with this statistic! 52 minutes and then a break for 17 minutes is not very productive. Although I do agree you should be getting up off your ass more than just for your lunch break. If you can work remotely and take your laptop out to a park and get some fresh air (and sunlight) then this is always going to be the wining solution.. but 52 min and then 17 min break.. come on!
52-Minute Work, 17-Minute Break is the Ideal Productivity Schedule