Objective To explore the thoughts and experiences of exercise adherence in breast cancer patients undergoing endocrine therapy,aims to provide reference for targeted intervention. Methods Employing purposive sampling, a descriptive qualitative study was conducted from Octomber 2023 to November 2024,and 24 breast cancer patients receiving endocrine therapy who visited a tertiary-level hospital in Tianjin, China, were selected for semi-structured in-depth interviews.The data was analyzed through traditional content analysis to extract themes. Results 3 primary themes and 6 sub-themes were identified,including sense of benefits from exercise(including physical benefits and psychological well-being),factors influencing exercise adherence(barriers and facilitators),and supportive needs for exercise adherence(including professional support and guidance,as well as emotional support and companionship). Conclusion Healthcare providers should consider the influencing factors,supportive needs of behavior change,and exercise experiences of breast cancer patients receiving endocrine therapy. Developing targeted exercise rehabilitation programs to address these needs could enhance exercise adherence.