Science Says You Should Leave Work at 2 p.m. and Go for a Walk
By Chris Mooney, Mother Jones, Aug. 1, 2014
Charles Dickens, perhaps the greatest of the Victorian novelists, was a man of strict routine. Every day, Dickens would write from 9 a.m. to 2 p.m. After that, he would put his work away and go out for a long walk. Sometimes he walked as far as 30 miles; sometimes, he walked into the night. âIf I couldnât walk fast and far, I should just explode and perish,â Dickens wrote.
According to engineering professor Barbara Oakley, author of the new book A Mind for Numbers: How to Excel at Math and Science (Even If You Flunked Algebra), Dickens wasnât just a guy who knew how to keep himself healthy. Rather, his habits are indicative of a person who has figured out how to make his brain function at a very high level. And for this, Dickensâ walks were just as important as his writing sessions. âThat sort of downtime, when youâre not thinking directly about what youâre trying to learn, or figure out, or write about--that downtime is a time of subconscious processing that allows you [to learn] better,â explains Oakley.
And structured downtime doesnât just help the worldâs greatest writers and thinkers do their best work; it helps all of us while weâre learning and striving to achieve tasks. Or at least it would, if someone told us how important it actually is. âWe spend from 12 to 16 years of our lives in formal education institutions. And yet, weâre never given any kind of real formal instruction on how to learn effectively,â says Oakley. âItâs mindboggling, isnât it?â
In fact, suggests Oakley, there are some very simple techniques and insights that can make you way better at learning--insights based on modern cognitive neuroscience. The most central is indeed this idea that while you obviously have to focus your cognitive energies in order to learn something (or write something, or read something, or to memorize something), thatâs only part of what counts. In addition to this âfocused modeâ--which relies on your brainâs prefrontal cortex--we also learn through a âdiffuse mode,â rooted in the operations of a variety of different brain regions. In fact, the brain switches back and forth between these modes regularly.
Whatâs crucial about the diffuse mode, writes Oakley in A Mind For Numbers, is that the relaxation associated with it âcan allow the brain to hook up and return valuable insights.â âWhen youâre focusing, youâre actually blocking your access to the diffuse mode,â adds Oakley on Inquiring Minds. âAnd the diffuse mode, it turns out, is what you often need to be able to solve a very difficult, new problem.â
Oakley is not a neuroscientist. However, as someone who initially hated math, but then later decided to âretrain my brainâ and become an engineer, she grew fascinated by the process of learning itself. âNow, as a professor, I have become interested in the inner workings of the brain,â she writes in A Mind for Numbers.
Oakleyâs findings are bad news for those of us at two extremes of the learning and working spectrum. First, there are the extremely driven (and control-obsessed) hard workers, who never let themselves rest, who sleep only five hours per night, and who fuel their unending labors with yet another coffee or yet another burst of chemical energy in the form of a cookie or a candy bar. In effect, these behaviors thwart the diffuse state. âSome very persistent and focused people can manage to hold that off some, because theyâre really focusing,â says Oakley. These people are missing out on a key part of the brainâs abilities.
And then, there are the procrastinators. You know who you are: You wait until the last minute to do your work, or to study for that test, or to write that paper. Then you put on a burst of conscious attention, including maybe pulling an all-nighter, but because youâre so close to your deadline, thereâs never any downtime at all. Thatâs a surefire way not to produce your best work--or, not to learn. âWhen you procrastinate, you are leaving yourself only enough time to do superficial focused-mode learning,â writes Oakley. And no diffuse mode at all.
This helps to explain why if you memorize a lot of stuff the night before a test, even if you do well on the test, youâll find that in a few weeks, you donât remember much of anything that you memorized.
The best approach, then, would seem to be to pace yourself. To work, and then to take a break, and to repeat that process steadily over days and weeks.
You can also train your mind to more profitably use both states. Hereâs one recommendation from Oakley:
One thing that I talk about in the book, and itâs so simple that it seems almost absurd, is that simple technique known as the Pomodoro technique. And in that technique you just set a timer for 25 minutes, and focus, and then when itâs done, you relax. So during that 25-minute time period, you really get rid of other extraneous, possible bothersome kinds of things like email sounds, or anything like that. But what this seems to do is it allows you to practice your ability to focus intently, and to practice your ability to let go and relax.
Unfortunately, weâre not yet at the point where the insights of modern neuroscience are being applied systematically in education, or in workplaces, to help us all achieve a higher potential. In the meantime, though, you can certainly practice them on your own.
âI think the real key that eludes people a lot of time,â says Oakley, âis the idea that itâs the removing of attention that actually allows that âah-haâ insight to take place.â