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Your belief in your own ability to succeed at a specific behavior — one of the strongest predictors of starting and sticking with exercise; it's built through small wins, models, encouragement, and managing how effort feels.
Self-efficacy (Bandura) is the confidence that you can perform a specific behavior and overcome its obstacles. It's task-specific ("I can train 3x this week" rather than general self-esteem) and is consistently one of the best predictors of exercise adoption and adherence — it rises as people move through the stages of change (see stages-of-change).
Bandura's four sources of self-efficacy (and how to build it for exercise):
Why it matters:
Educational content only — not medical advice. Always consult a qualified professional for individualized guidance, especially around injury, pregnancy, or medical conditions.