本分析旨在探讨乳腺癌幸存者的运动行为与来自不同理论的三种行为结构之间的关联：社会认知理论中的自我效能、自我决定理论中的动机以及习惯理论中的习惯。乳腺癌幸存者（n=204）完成了一项横断面调查，收集了人口统计学和疾病特征、运动水平以及自我效能、动机和习惯。采用多元线性回归模型来识别与总活动和抗阻训练相关的结构。参与者的平均（标准差）年龄为57.3（10.8）岁，大多数被诊断为早期疾病（72%），并且参与足够的总活动（94%），但只有45%每周完成≥2次抗阻训练。识别的动机（与总活动相关，β[95% CI]=7.6 [3.9-11.3]）和习惯（与总活动相关，β[95% CI]=4.4 [1.4-7.4]）与总活动显著相关（身体质量指数和疾病阶段也相关），而识别的动机（与抗阻训练相关，β[95% CI]=0.6 [0.3-0.9]）和应对自我效能（与抗阻训练相关，β[95% CI]=0.02 [< 0.01-0.03]）与抗阻训练显著相关。模型解释了总活动和抗阻训练行为方差的27%和16%。结果表明，将支持识别的动机、习惯和应对自我效能的策略纳入未来的干预措施中，可以促进乳腺癌人群的运动行为增加。未来的纵向研究应该在更具代表性的以人群为基础的样本中考虑与运动的关联。©2023. 作者。

The purpose of this analysis was to explore associations between exercise behaviour among breast cancer survivors and three behavioural constructs from distinct theories: self-efficacy from social cognitive theory, motivation from self-determination theory, and habits from habit theory.Breast cancer survivors (n = 204) completed a cross-sectional survey that collected demographic and disease characteristics, exercise levels, and self-efficacy, motivation, and habits. Multivariable linear regression models were used to identify constructs associated with total activity and resistance training.Participants were a mean (SD) age of 57.3 (10.8) years and most were diagnosed with early-stage disease (72%) and engaged in sufficient levels of total activity (94%), though only 45% completed ≥ 2 resistance training sessions/week. Identified motivation (ꞵ[95% CI] = 7.6 [3.9-11.3]) and habits (ꞵ[95% CI] = 4.4 [1.4-7.4]) were significantly associated with total activity (as were body mass index and disease stage), whilst identified motivation (ꞵ[95% CI] = 0.6 [0.3-0.9]) and coping self-efficacy (ꞵ[95% CI] = 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 behaviour, respectively.Results suggest that incorporating strategies that support identified motivation, habits, and coping self-efficacy in future interventions could promote increased exercise behaviour among breast cancer populations. Future longitudinal research should examine associations with exercise in a more representative, population-based sample.© 2023. The Author(s).