Rethinking the habit formation timeline · Mind and Body Solutions

Rethinking the habit formation timeline

You may have heard it takes 21 days to build a habit. I won’t go into the origin of that claim, but it didn’t come from a rigorous study.

When it comes to building habits, consistency matters more than perfection. And that can be challenging, too. Travel. Family. Life gets loud.

How are habits formed, and how do we maintain them?

When it comes to consistency, never miss twice. The single best rule for habit formation I found is to never miss two days in a row. Research supports this. UCL researchers found that a single missed day barely registered in the habit-formation process. Once people got back on track, their progress resumed.

Give it at least 90 days, not 21. In my experience, habits tend to take between two and three months to properly lock in. University College London researchers found it takes an average of 66 days — and for some folks, nearly 200 days — for a habit to go from effortful to automatic. So if you've ever "failed" to stick to a habit after a three-week challenge, there's a decent chance the timeline was the problem, not you.

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