Promoting exercise in oncological aftercare

Physical exercise is a key non-pharmacological strategy in oncological aftercare, contributing to improvements in physical performance, quality of life, and symptom management. This study evaluates the 4x4 training programme developed by Outdoor Against Cancer (OAC), a supervised high-intensity interval training (HIIT) intervention based on the Norwegian 4x4 protocol, implemented over nine months in Munich. Participants, including individuals with active cancer, survivors in remission, relatives, and health-oriented individuals, completed a structured survey assessing feasibility, safety, adherence, and perceived effects. Results revealed high long-term commitment, with a substantial proportion attending more than sixteen sessions. Participants reported notable benefits, including reduced cancer-related fatigue, enhanced emotional well-being, improved strength and endurance, and increased quality of life. The programme was perceived as safe and well-structured, with individualized supervision playing a crucial role in motivation and adherence. These findings support the feasibility and positive impact of supervised HIIT programmes in oncological exercise therapy and highlight their potential integration into standard cancer aftercare.