The purpose of this study is to characterize the relationships between changes in cognitive functioning across the day and patterns of physical activity in older adults. Those who participate in the program will complete tests of cognition and several surveys at the start. They will then wear an activity monitor and complete four cognitive tests plus surveys per day for one week. After this week concludes, they will continue completing the surveys and cognitive tests, and will engage in one week of structured exercise at a research center and one week where they work to move throughout the day.

Inclusion Criteria:

• age ≥65
• fluent in English
• own a smartphone
• able to provide digital informed consent
• able to walk without assistance from others (a cane or walker is allowed)
• low-active as defined by participating in purposeful aerobic exercise two days or less per week

Exclusion Criteria:

• potential neurological cofounders (stroke, seizure disorder, recent head injury or loss of consciousness)
• diagnosis of clinical mental abnormalities (e.g., schizophrenia, bipolar disorder, Parkinson's Disease, Alzheimer's disease and related dementias)
• any other conditions that may impact their ability to complete the ecological momentary cognitive tasks or physical activity (e.g., visual or auditory impairments, uncontrolled arthritis)
• A score lower than 32 on the TICS-M.