Mindful Steps 2.0: Promoting Physical Activity in Patients With COPD and HF

This study is testing a mindfulness-based physical activity program called "Mindful Steps 2.0" to help people with COPD (a chronic lung disease) or heart failure increase their daily physical activity using a Fitbit and online support. **You may be eligible if...** - You have a clinical diagnosis of COPD (with significant smoking history and breathing test results or CT evidence) OR heart failure (with reduced or preserved heart function, NYHA class 1–3) - Your doctor has cleared you to participate in an exercise program - You have an active email account and access to a smartphone, tablet, or computer that supports the Fitbit app **You may NOT be eligible if...** - You had a COPD or heart failure flare-up in the past month - You are unable to walk - You cannot collect 7 out of 14 days of baseline step count data - You are already in a cardiac or pulmonary rehabilitation program Talk to your doctor to see if this trial is right for you.