Control over exercise was measured using the 6-item Exercise Control Beliefs Scale [30]. The items assess one’s beliefs about one’s control over exercise (eg, I am confident in my ability to do an exercise routine), with answer choices ranging from strongly disagree (score=1) to strongly agree (score=5). The 6 items were averaged to create a mean exercise control score, with a higher score indicating greater control over exercise. The Cronbach α value for the internal consistency in this sample was .604.
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