PLATE XII   Chapter 14, available on the treadmill only.

NOTE 11 · CHAPTER III

The book that waits for a walk

HABITAT    Sidewalks, gyms, household chores

Gym members given page-turner audiobooks they could only hear at the gym went about half again as often as people with no audiobooks — at first. The boost faded over the weeks, especially after a holiday break. Still, when it was over, most participants said they’d pay to keep their books locked to the gym.24 A want paired with a should makes the should easier to start.