Exercise snacking is the fitness trend that finally matches real schedules: one to ten minutes of movement several times a day instead of one heroic session.
It works for inactive people precisely because the barrier is gone. No gym bag, no commute, no ninety-minute block to defend against everyone else's calendar.
That is also the failure mode. A five-minute habit is too small to feel like a broken promise, so you drop it the way you drop flossing — quietly, and then permanently.
Small habits need borrowed stakes. One daily check-in in front of five to eight people gives a five-minute habit a consequence it cannot generate on its own.
Do one movement snack in the next hour, then check in yes.