No mention of the sample size, the work being measured, or the methodology in general. I'm not at all surprised that this garbage got picked up by Quartz, but it doesn't belong on HN.
Fair enough, but I suspect most people are not under control of their working schedule. Also, most are supposed to work for at least 8 hours a day. Planning for 15+ minutes break every hour, that means a total of 2+ hours break in addition to the 8 hours work. Add the daily commute, and you easily end at 11-12 hours for "business". So I guess this approach makes only sense, if you can afford to do real work for 6 hours, and spend the rest for breaks.