RecruitingBehavioural interventionCommunity Park-Based Programs for Health Promotion: Active Older Adults Prospective Cohort StudyThe Active Older Adults prospective cohort study examines the effects of a park-based fitness program on cardiovascular fitness outcomes for older adults (aged 50 years and older). Duke will perform a secondary analysis of the data collected as part of the Active Older Adults prospective cohort study run by Miami-Dade County Parks and Recreation.