Longer breaks are good, but it's beneficial to take frequent short breaks.
While the study was unable to pinpoint an exact length of time for a better workday break (15 minutes, 30 minutes, etc.), the research found that more short breaks were associated with higher resources, suggesting that employees should be encouraged to take more frequent short breaks to facilitate recovery.
"Unlike your cellphone, which popular wisdom tells us should be depleted to zero percent before you charge it fully to 100 percent, people instead need to charge more frequently throughout the day," Hunter said.
Science Daily/SOURCE :http://www.sciencedaily.com/releases/2015/09/150909132945.htm