This is a 2-arm parallel remotely delivered RCT. A total of 136 participants with COPD and/or HF will be randomized in a 1:1 ratio to one of 2 arms in a pragmatic design: 1) Mindful Steps multi-modal intervention, or 2) usual care (including an education booklet on walking). Subjects will participate in the intervention for 12 months. Testing will occur at baseline, 3, 6, 12 (end intervention), and 15 months (post-intervention follow up) for all participants. Physical activity as measured by pedometer (i.e., daily step counts) at 12 months is the primary outcome to assess the efficacy of the Mindful Steps intervention. Secondary outcomes include cognitive-behavioral measures that may relate to behavior change in a conceptual model (self-efficacy, intrinsic motivation, mindful awareness/interoception) as well as patient-centered clinical outcomes (HRQL, dyspnea, fatigue, PA engagement, sedentary behavior).
