Objective: This study aims to explore the impact of group therapy, incorporating physical games for happiness perception training, on the psychological well-being and physical fitness of healthcare professionals and patients with depression in a psychosomatic ward. The focus is to provide a comprehensive understanding of the role of physical activity in enhancing therapeutic outcomes in clinical nursing. Methods: The study gathered data from 12 group-led nurses, 12 depressed patients participating in group therapy, and 6 supervising physicians in a large tertiary general hospital's psychosomatic ward in Sichuan Province. Utilizing the phenomenological method in qualitative research, we collected insights into the participants' psychological experiences and the role of physical games in therapy. The Colaizzi 7-step analysis method was employed to process and synthesize the data, with an added focus on physical fitness aspects. Results: Analysis revealed three core themes – "gains, opinions or ideas," and ten minor themes, including "releasing stress, managing emotions, minimizing suicidal ideation, and enhancing physical fitness." Participants reported significant improvements in emotional well-being, stress relief, and physical health due to the integration of physical activities into the group therapy sessions. Conclusion: The inclusion of physical games in group therapy for happiness perception training has dual benefits for patients with depression and healthcare professionals: psychological support and improvement in physical fitness. Clinical nursing staff should promptly provide appropriate health guidance, adjust group content and schedule, and incorporate physical fitness elements to enhance the quality of group therapy. This approach not only aids in active patient participation in treatment but also promotes holistic physical and mental health recovery, underscoring the importance of physical activity in psychological rehabilitation.