The Effectiveness of an App-Based Fitness Program on Self-Perceived Physical Functioning in Older Adults: Randomized Waitlist-Controlled Trial

Although the fitness app was designed as a multicomponent program, it supported only selected capabilities relevant for independent living. The app-based physical activity program increased self-perceived physical functioning related to strength, endurance, and balance, but not to flexibility. This highlights a clear need for future apps and research to focus on all relevant areas, including flexibility and mobility, which are crucial for fully maintaining independence in older adults.