Effects of Using a Smartphone App Combined With Behavior Change Techniques on the Level of Physical Activity Among Adults and Older Adults: Sequential Multiple Assignment Randomized Trial.

Key Points

• The research aims to evaluate how a smartphone app combined with behavior change techniques influences physical activity levels among adults and older adults.
• Conducted a sequential multiple assignment randomized trial
• Utilized a smartphone app with integrated behavior change techniques
• Assessed levels of physical activity among participants over time
• Participants demonstrated increased levels of physical activity after using the app
• Behavior change techniques effectively contributed to a sustainable change in physical activity
• Gradually introducing new stimuli further enhanced behavior change in participants