Abstract: Objective: Exploring the influencing factors of physical activity in women during early pregnancy based on society ecosystems theory. Methods: Early pregnancy women registered in the perinatal care outpatient department of a tertiary grade A hospital in Henan Province were selected as study subjects by purposive sampling method. Developing interview outline based on society ecosystems theory, and face-to-face semi-structured interviews were conducted using the phenomenological research methods. Data were analyzed using content analysis to extract themes. Results: Based on three systems, nine subthemes were identified, including microsystem (physiological changes and experiences during pregnancy, emotional and mood experiences, personal cognition and health beliefs), mesosystems (family and social support, medical support and professional guidance, work environment support) and macrosystems (social and cultural norms and beliefs, environmental support resources, economic factors). Conclusion: The factors influencing physical activity in pregnant women are complex and varied. Healthcare professionals should provide personalized guidance and diverse interventions to improve the level of physical activity in women during early pregnancy.

Key words: Early pregnancy women, Physical activity, Society ecosystems theory, Qualitative study

摘要： 目的：基于社会生态系统理论探讨早期妊娠女性体力活动的影响因素。方法：采用目的抽样法，选取河南省某三级甲等医院围产保健门诊建档立卡的早期妊娠女性作为研究对象。基于社会生态系统理论制定访谈提纲，并采用现象学研究方法进行面对面半结构式访谈。采用内容分析法分析资料，提炼主题。结果：基于 3 个系统提炼出 9 个亚主题。微观系统包括妊娠期生理变化与体验、情感与情绪体验、个人认知和健康信念，中观系统包括家庭和社会支持、医疗支持和专业指导、工作环境支持，宏观系统包括社会文化规范和观念、环境支持资源、经济因素。结论：影响早期妊娠女性体力活动的因素复杂多样，医务人员应提供个性化的指导和多样化的干预措施以提高早期妊娠女性体力活动水平。

关键词: 早期妊娠女性, 体力活动, 社会生态系统理论, 质性研究