Recalling past success and receiving support from others can increase the self-efficacy -- a term that roughly means the confidence that one can perform and achieve goals -- needed to adhere to an exercise routine, according to a study of people in their 60s and early 70s published in the American Journal of Preventive Medicine. "People who are more efficacious tend to approach more challenging tasks, work harder and stick with it even in the face of early failures," lead study author Edward McAuley said.

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