The 21/90 Rule: Myth or Fact?
Does it really take 21 days to build a habit? We dive into the research.
Understanding the 21/90 Rule
Conventional wisdom says it takes 21 days to form a habit and 90 days to create a lifestyle. But research suggests it's more variable.
A study by Phillippa Lally found it took anywhere from 18 to 254 days.