Affective exercise experiences predict physical activity behaviour in cardiac outpatients within a home-based cardiac rehabilitation programme.

Home-based cardiac rehabilitation (HBCR) programmes increase exercise capacity but often face poor adherence to physical activity (PA). This study tested the structural validity of the Affective Exercise Experiences Questionnaire (AFFEXX) in a cardiac population and examined the role of the novel construct of affective exercise experiences in predicting exercise behaviour during an HBCR programme. A sample of 177 patients enrolled in a 10-month HBCR programme, completed a moderate-intensity treadmill walking test, and completed the AFFEXX questionnaire and the 7-day Physical Activity Recall at the beginning and end of the programme. Structural equation modelling confirmed the structural validity of the AFFEXX, with a good fit to the data (Comparative Fit Index = 0.97, Tucker-Lewis Index = 0.95, RMSEA = 0.08). Core affective exercise experiences, which were influenced by antecedent appraisals, significantly predicted attraction-antipathy towards exercise. Multiple regression analysis indicated that follow-up PA was significantly predicted by attraction-antipathy towards exercise (b = 0.24, p = 0.001) and baseline PA (b = 0.29, p = 0.001). The model accounted for 31% of the variance in PA. The study highlights the association between attraction towards exercise and adherence to PA in participants enrolled in an HBCR programme, emphasising the importance of this novel construct.