What is the most important factor in achieving durable behavior change?
The most important factor in achieving durable behavior change is identity shift. When individuals adopt a self-concept that aligns with their target behavior, such as seeing themselves as 'a person who trains,' they are more likely to maintain that behavior over time. This identity-based approach is a stronger predictor of long-term success than mere intention or motivation.
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This is one answer. The complete system — the psychology, the biology, and the method — is in the book.
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