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Objectives: To examine the determinants of physical activity (PA) in young adult cancer survivors (YACS). Methods: A survey of 588 YACS in Alberta, Canada, assessed PA, medical and demographical factors, and theory of planned behavior variables. Results: Path analysis explained 38% (P<.001) of the variance in PA with significant contributions from intention, planning, affective attitude, education, and general health. In turn, 56% (P<.001) of the variance in intention was explained by perceived behavioral control, instrumental attitude, and affective attitude. Conclusion: PA interventions in YACS should focus on developing strong intentions by targeting perceived behavioral control, instrumental attitude, and affective attitude. [ABSTRACT FROM AUTHOR]

Objectives: To examine predictors of physical activity (PA) 6 months after a randomized controlled trial. Methods: Breast cancer survivors (N=377) completed assessments at baseline, postintervention, and 6 months after the intervention. Data were collected on demographic, medical, psychosocial, motivational, and behavioral variables at baseline, postintervention, and 6 months. Results: Survivors meeting PA guidelines at baseline (OR=5.54, 95% CI=2.99-9.82, P<0.001) and postintervention (OR = 2.92, 95% CI=1.63-5.23, P<0.001) had a greater likelihood of meeting PA guidelines at 6 months follow-up. Conclusions: Interventions promoting PA maintenance should focus on optimizing PA behavior, psychosocial functioning, and motivation. [ABSTRACT FROM AUTHOR]