>Could it not be that people who have the willpower to run regularly also have the willpower to stay focused? This is just an anecdote, of course, but I notice

>Could it not be that people who have the willpower to run regularly also have the willpower to stay focused? This is just an anecdote, of course, but I notice a major boost to my ability to concentrate, avoid distractions and think after a good aerobic exercise session. My efficiency goes from <1 hour of intellectual work done in a day to >4. The boost lasts about 2 days, after which the lethargy sets back in.