目的：當個體罹病後，應積極地尋求健康促進生活型態以獲得良好的生活品質，尤以存活期逐漸延長之癌症為最，藉由非醫療照護提升患者生活適應能力為現今醫療應努力之方向，因此本研究欲探討成年乳癌患者運動參與之影響因素，期盼可透過運動來改善患者生活品質。方法：本研究透過立意取樣方式進行問卷調查，共回收有效問卷48份，並使用SPSS 22.0進行統計分析。結果與結論：研究結果發現：一、不同年齡層之乳癌患者在「環境影響」構面具顯著差異。二、是否進行放射線治療之乳癌患者在「運動參與」構面達顯著差異。三、自覺自我效能對及環境影響與運動參與行為呈正相關且具有預測力。最後歸納出以下結論：年齡、放射線治療、自我效能感及環境因素會影響乳癌患者的運動參與行為，中高齡者對運動環境的選擇有較多的考量，環境越友善、交通越便利，即可有較好的運動參與行為；有放射線治療的患者具有較好的運動參與行為；自我效能感的高低會影響個體參與活動的自信心，進而影響其運動參與行為。

Purpose: When an individual get sick, he or she should actively have a health promotion lifestyle to achieve a good quality of life, especially the cancer survivor who had a prolonged survival period recently. Now these days, we should try non-medical care to improve the patient's ability to adapt to life after getting sick instead of the traditional medical care. Therefore, this study aim to explore the influencing factors of exercise participation in adult breast cancer patients, and hope to improve the quality of life of patients through exercise. Method: In this study, 48 questionnaires were collected through purposive sampling, and SPSS 22.0 was used for statistical analysis. Conclusion and Discussion: The results of the study found that: 1. Breast cancer patients of different ages have significant differences in the ＂situation influences＂ facet. 2. Whether breast cancer patients undergoing radiation therapy have significant differences in the ＂exercise participation＂ facet. 3. ＂Perceived self-efficacy＂ and ＂situation influences＂ are positively correlated with exercise participation. We conclude that, age, radiation therapy, self-efficacy and situation factors will affect the exercise participation behavior of breast cancer patients. The middle-aged and elderly people have more considerations for the choice of exercise environment. The more friendly and convenient the traffic, the better exercise behavior will be participated. Patients with radiation therapy have better exercise participation behavior. The level of self-efficacy will affect the self-confidence of individuals participating in activities, and thus affect their participation in exercise.