Guided Episodic Future Thinking to Increase Physical Activity Adherence and Promote Healthy Brain Aging

During the audio recorded guided imagery exercise participants will be asked to think in detail of a future (6 months to a year) where they have made healthy choices regarding physical activity and are physically active.

During the audio recorded guided imagery exercise participants will be asked to think about a routine weekly activity.

During the audio recorded guided imagery exercise participants will be asked to think in detail about the positive outcomes and sensations associated with an exercise bout.

During the audio recorded guided imagery exercise participants will be asked to think in detail about the physical sensations associated with an exercise bout.

"The high intensity interval training (HIIT) will be conducted 2 times per week for 6 weeks. The duration of each individual exercise session will last about 45 minutes. After the 5-minute warm-up at 30% peak workload, HIIT will consist of repeated 1-minute high intensity bursts (on interval) alternated with 1-minute interval recovery (off interval) for 25 minutes. The on interval will begin at 80% of peak watts (range: 75%-85%) followed by the off interval at 10% of peak watts. The session will end with up to 10 minute cool-down at 20% peak workload."