Matt Richtel, The New York Times:
Even though people feel entertained, even relaxed, when they multitask while exercising, or pass a moment at the bus stop by catching a quick video clip, they might be taxing their brains, scientists say.
‘People think they’re refreshing themselves, but they’re fatiguing themselves,’ said Marc Berman, a University of Michigan neuroscientist.
I hate to beat a dead horse, but for me, creative pausing continues to play an important role in maintaining mental acuity.
You should read both the New York Times article and Cameron’s musings in his self-linked post Why thinking in the shower may be an ideal model for “creative pause”.