Which brings us to Klingberg’s most surprising and even counterintuitive suggestion. Multitasking often threatens to overload the working memory. But at the same time, it’s clear that we can actually manage it, at least to some degree – reading a newspaper while walking on a treadmill, for example, and occasionally glancing up at the TV screen to see what’s breaking on CNN.
“There is, fortunately, no research suggesting that exposure to mentally more demanding or challenging situations impairs our powers of concentration,” writes Klingberg. “Indeed, there is much that points to the contrary: it is in situations that push the boundaries of our abilities that we train our brains the most.”