The purpose of this study is to explore the effects of maternal participation in a yoga program on parenting stress and physical and psychological changes, providing foundational data for positive changes. Qualitative case study methodology was employed to achieve this objective. Using purposive sampling, nine mothers with no prior yoga experience who had infants participated in the study. Data was collected through in-depth interviews, participant observations, and yoga journals. The collected raw data underwent qualitative content analysis involving transcription, open coding, axial coding, and selective coding, resulting in the reconstruction of subthemes, main themes, and overarching themes for analysis. The conclusions drawn from this study can be summarized as follows. Firstly, in terms of changes in parenting stress, participating mothers found reflective time for self-examination, enabling them to accept themselves and their children. Secondly, yoga postures aimed at relieving physical discomfort and muscle pain translated into efforts to maintain correct posture and perform yoga poses in daily life. Thirdly, in terms of psychological changes, participation in the yoga program became a source of vitality in the participants' lives, alleviating feelings of lethargy. Through complete concentration and immersion, they developed psychological stability. Additionally, the motivation to learn yoga or other subjects led to an enhanced sense of challenge and the pursuit of ultimate life goals and fundamental meaning.