Supportive Care in Cancer · 7 authors, 6 centres
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In a cross-sectional survey of 204 breast cancer survivors, identified motivation and habits were significantly associated with total activity, while identified motivation and coping self-efficacy were significantly associated with resistance training.
This cross-sectional survey study examined associations between exercise behaviour and three psychological constructs—self-efficacy (social cognitive theory), motivation (self-determination theory), and habits (habit theory)—among 204 breast cancer survivors recruited online between March and December 2020. Most participants were diagnosed with early-stage disease (72%) and engaged in sufficient total activity (94%), though only 45% completed at least two resistance training sessions per week. Multivariable linear regression models identified that identified motivation (β=7.6 [3.9–11.3]) and habits (β=4.4 [1.4–7.4]) were significantly associated with total activity, while identified motivation (β=0.6 [0.3–0.9]) and coping self-efficacy (β=0.02 [<0.01–0.03]) were significantly associated with resistance training. The models explained 27% and 16% of variance in total activity and resistance training, respectively. The cross-sectional design precludes causal conclusions, and the sample was skewed toward active, more highly educated women due to online recruitment. Results suggest that integrating strategies targeting identified motivation, habits, and coping self-efficacy could promote exercise in breast cancer populations.
