A Text- and Audio-based Intervention to Promote Physical Activity in Midlife

Inclusion Criteria: * Midlife adults (aged 45-64 years at the time of enrollment) * Suboptimal physical activity (\<150 minutes of moderate to vigorous physical activity, measured by accelerometer) * Access to a phone capable of receiving text messages and listening to audio files (i.e., a smartphone) Exclusion Criteria: * An unrelated condition limiting physical activity * Participation in any other programs focused on cardiac prevention or well-being * A cognitive disturbance precluding participation or informed consent * Current pregnancy * Inability to speak/write fluently in English