Journey 11 · Nurture
In One Study, New Habits Took a Median of 66 Days
In one study, new daily habits were estimated to take a median of 66 days to feel as automatic as they would get (18 to 254 days), and one missed day did not derail it.
In one study, 96 volunteers each picked an eating, drinking or exercise behavior to do every day and rated, for 12 weeks, how automatic it felt (Lally et al., 2010). From those ratings, researchers estimated how long each person took to level off. Among people whose progress fit the model well, the median was 66 days, and the estimates ranged from 18 days to 254, well past the 12 weeks. Missing a single day did not materially affect the process.
It is one study, so read the numbers as a guide, not a rule: the ratings were people's own, and it tested eating, drinking and exercise habits, not every kind of act. Still, the popular 21 days is not the typical time it found. Some habits took far longer than others, and one missed day was a missed day, not a reset.
In Journey 11, Nurture, guided by Nayeli, you plant one small act of care each day, expect it to take weeks rather than days, and plant again the day after a miss. What small act would you keep planting, even after a missed day?
The research
Growing evidence Real research that's still building — results are promising and still being tested.
- Lally, P., van Jaarsveld, C. H. M., Potts, H. W. W., & Wardle, J. (2010). How are habits formed: Modelling habit formation in the real world. European Journal of Social Psychology, 40(6), 998–1009.
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