Cognitive Control to Boost Physical Activity Adherence

This trial is designed to develop and test the efficacy of cognitive training strategies to improve self-regulatory capacities for middle-aged adults to adopt and sustain a physically active lifestyle. The main questions it aims to answer are: * Can cognitive training designed to improve cognitive control improve physical activity adherence? * What are the psychological, physiological, cognitive, and sociodemographic factors that affect the impact of cognitive control on physical activity adherence? Participants will * Complete a 6-week home-based, computerized cognitive training program * Complete a 6-week home-based, aerobic exercise training program with supervision of a health coach and trainer * Complete a 6-week home-based, aerobic exercise training program prescribed by a health coach and trainer * Visit the laboratory before and after cognitive training, and before and after physical training, to complete assessments of cognition and aerobic fitness