The habit that survived a holiday

Two groups of adults took up running. Both ran for eight weeks and then went away for two. On returning, one group almost entirely stopped and the other almost entirely continued. The difference was not motivation, age or fitness. It was where the run had been attached.

The group that continued had each tied the run to a fixed cue that travelled with them: after brushing their teeth, before breakfast, on leaving the house. The group that stopped had tied it to a context that did not travel: a particular class, a particular park, a particular friend.

Habit research describes this as cue dependence, and it predicts the pattern. A behaviour triggered by a stable internal cue survives a change of place; one triggered by an external arrangement fails exactly when the arrangement does. The two look identical for eight weeks, which is why the distinction only shows up at a disruption.

The practical move is to choose the cue deliberately and to test it early. If you intend the habit to last a year, it will meet a holiday, an illness and a change of timetable, and the useful question at week two is not whether you are managing but what would happen if the room were different.

There is a smaller finding worth keeping. The group that continued had also agreed in advance on a minimum version: ten minutes, no excuses, counts as a run. Such a floor seems trivial and it protects the cue, because the cue is only maintained by being followed, and a day that is too busy for a proper session is not too busy for the floor.