Assess the learner’s ability to apply behavior change theories (e.g., Social Cognitive Theory, Transtheoretical Model, COM-B/Behavior Change Wheel) to design, implement, and evaluate community-based physical activity interventions for older adults, including selection of theory-driven behavior change techniques, tailoring to age-related barriers and facilitators, and developing process and outcome evaluation plans using fidelity checks, RE-AIM elements, and appropriate PA measures (e.g., accelerometry, validated questionnaires, functional tests) to inform program improvement and scale-up.