Hundreds of studies have shown self-efficacy is important in performing an action or activity (exercise, taking medication, doing a HEP, quitting smoking, etc). Here is another from an Open Access journal about how SE, social support, and physical exercise is important in functional health:
Lachman ME, Agrigoroaei S (2010) Promoting Functional Health in Midlife and Old Age: Long-Term Protective Effects of Control Beliefs, Social Support, and Physical Exercise. PLoS ONE 5(10): e13297. doi:10.1371/journal.pone.0013297
How do you promote your patient’s self-efficacy?