The STEP 4Life Trial

Increased physical activity by walking further or more vigorously may prevent or delay the development of Alzheimer's Disease and Related Dementias (ADRD) but reaching higher levels of activity and maintaining it as a long-term habit is difficult to do. This project will use concepts from behavioral science to create a game older adults can play in order to increase their levels of activity while having fun doing it. The game is played with a support partner who is a spouse, family member, or close friend who provides feedback and encouragement to help the game-player reach activity goals and maintain them as habits over time. Participants in the game will use their own smartphone and a wristwatch that tracks activity (such as a FitBit, provided by this study) to set goals, get feedback, and play the game for 12 weeks. Participants will be asked to continue wearing the wristwatch for another 6 weeks to track activity after the game is over. To determine the effectiveness of this game, investigators will randomly assign 50 people to the game and 50 people to only get the wristwatch but no game component. All participants in this study will be recruited from an online registry of adults age 55-75 who have not been diagnosed with Alzheimer's (GeneMatch) which offers genetic testing on risk for ADRD to all participants. Investigators will recruit participants who have elevated genetic risk as well as those without specific genetic risks for the study to see if either group responds differently to the game.