Comment Re:It's not a "right" (Score 3, Insightful) 105
Actually, short breaks _don't_ improve productivity. Latest study (Harvard Business Review - http://hbr.org/2012/05/coffee-breaks-dont-boost-productivity-after-all/ar/1 - _do_ sign up and read the whole article, don't just read the headline) shows that productivity is, at best, indifferent to micro breaks and at worst, reduced significantly.
Those breaks _do_ have some effect on the stress level of the employee, but that's not of the employer _immediate_ concern (though long-term employers should factor this into their calculations).
Numbers and cases, or it isn't science.
(oh, and 5 minutes of an 8 hours day is ~1%, not 0.2%).