Action
Exercise
Physical activity or exercise in general.

Studies (12)
Paper
A tiny daily exercise goal added up to more exercise among those who stayedUsedHelpedThree minutes a day plus two short weekly sessions gave more exercise than two long ones, among those who stayed.
Randomised trial of 142 UK adults who exercised very little · vs two 30-minute sessions a week · they rated themselves · ⚠ only counted people who finished
Paper
Exercise logs and video feedback in a sports course got students to exercise moreUsedHelpedStudents who logged their exercise and got feedback on their videos said they exercised more than the usual class.
Randomised trial of 308 university students in China · vs the same sports course taught the usual way · they rated themselves · ⚠ whole groups were assigned, not people; numbers unreliable
Paper
A form-checking exercise app got people with high blood pressure moving moreUsedHelpedPeople who got live feedback on form, reminders and weekly calls said they exercised more than the other group.
Small randomised trial of 62 inactive adults with high blood pressure · vs the same exercise plan without feedback or calls · they rated themselves · ⚠ numbers unreliable; summary claims more than the results show
Paper
All four people in coached exercise with weekly pledges came to every sessionUsedNo comparisonAll four people who had coached sessions, weekly pledges and a pin board came to all 24 sessions.
Very small randomised trial of 6 inactive adults with epilepsy in Iowa · no comparison group · behaviour was recorded · ⚠ groups weren't properly compared
Paper
Men who planned gym times and trained with coaches were more activeUsedHelpedMen who planned set exercise times, laid out gym clothes and trained with coaches moved more than men without it.
Trial, groups not picked at random of 139 inactive men at a Saudi university · vs men who got no programme · behaviour was recorded · ⚠ numbers unreliable
Paper
An app that picked exercise for each person didn't get people more activeUsedNo differenceAn app that picked short home exercise for each person did not get people more active than a plain log.
Randomised trial of 112 adults who rarely exercised, in France · vs the same app, writing down activity yourself · they rated themselves · ⚠ not yet checked by other scientists; many people dropped out; only counted people who finished; numbers unreliable
Paper
Only 1 in 11 at-risk workers took up exercise after one health talkUsedNo comparisonAbout 1 in 11 took up exercise in a year, more often people who already walked or tried to change.
Large observational study of 16,471 Japanese workers at risk of metabolic syndrome · can't show cause · they rated themselves · ⚠ numbers unreliable; summary claims more than the results show
Paper
Teaching instructors to make classes more fun didn't build stronger exercise habitsUsedNo differenceShowing coaches how to make class fun did not build a stronger habit to go than a talk on training.
Randomised trial of 132 university sport course members in Germany · vs classes whose instructors learned about training · they rated themselves · ⚠ whole groups were assigned, not people; numbers unreliable; many people dropped out
Paper
Lessons on exercising at a set time made no clear difference for heart patientsUsedNo differenceGroup lessons on exercise at a set time with cues at home made no clear change to weekly exercise.
Very small randomised trial of 13 heart patients starting cardiac rehab in Canada · vs group meetings about healthy eating, same gym · they rated themselves · ⚠ numbers unreliable; summary claims more than the results show
Paper
Health signs by the stairs got slightly fewer people to take the escalatorUsedHelpedWith a short health message by the stairs, fewer people took the escalator at all four places.
Large trial, groups not picked at random of 115,062 people at stairs and escalators · vs times with no sign at the same place · behaviour was recorded
UsedMixedAlone, the design did nothing at first, but after the message it cut escalator use at two of three places.
Large trial, groups not picked at random of 115,062 people at stairs and escalators · vs times with no sign at the same place · behaviour was recorded
Paper
Web plans built exercise and diet habits briefly, but not by three monthsUsedMixedPlans for when, where and how to move built a stronger habit at 8 weeks, but not at 3 months.
Randomised trial of 790 adults in Germany and the Netherlands · vs people who were waiting for the programme · they rated themselves · ⚠ many people dropped out; numbers unreliable; summary claims more than the results show
Paper
A 20-week starting choice led to more good exercise weeks than 8 weeksUsedHelpedPeople first shown a 20-week contract had more good exercise weeks than those shown 8 weeks: about 4, against 3.
Large randomised trial of 8,809 adults who set up an online exercise contract · vs people first shown an 8-week contract · they rated themselves · ⚠ not yet checked by other scientists; summary claims more than the results show; numbers unreliable
Often used with it


Rule · where5
Put a visible cue where you'll do itA sticker, poster, object or wearable prompt at the point of action.



Rule · how often3
Check in once a weekA short weekly review of progress: a call, message or consultation, or going over your own log. Not the weekly sessions of a course.
