Online Tai Chi Plus Fitbit After ACS

Eligibility Criteria

• 1. History of ACS (unstable angina, NSTEMI, and STEMI, defined per current AHA/ACC criteria);
• 2. Age ≥ 18;
• 3. Being physically inactive (i.e., \< 150 min/week of moderate-intensity aerobic PA);
• 4. Absence of contraindications to physical exercise per the participant's provider evaluation;
• 5. Access to a digital device with internet connection;
• 6. Having an active email account and ability to check email at least weekly;
• 7. Physician clearance to participate in low-moderate intensity exercise (tai chi), including a statement that there is no contraindication to exercise based on post-ACS stress test and other factors, as appropriate;
• 8. English speaking
• 1. Inability or unwillingness to give informed consent;
• 2. Blood pressure \>200/110 or orthostatic systolic blood pressure decrease \>20 mmHg at the baseline visit;
• 3. Uncontrolled/untreated atrial or ventricular arrhythmias or 3rd degree AV block;
• 4. Within 3 months of a diagnosis of pericarditis or myocarditis;
• 5. Medical conditions likely to limit lifespan to less than one year;
• 6. New York Heart Association (NYHA) functional class IV;
• 7. Severe cognitive impairment (BOMC \>10);139
• 8. Orthopedic problems prohibiting TC practice;
• 9. Ongoing TC or other mind-body training (i.e., meditation, TC, or yoga) at least weekly;
• 10. Current enrollment in cardiac rehabilitation;
• 11. Untreated severe depression (PHQ\>=20);
• 12. Conditions likely to affect study compliance (i.e., moving out of study area, substance use, ongoing untreated psychosis);
• 13. Symptoms of unstable cardiovascular disease (e.g., shortness of breath or chest pain at rest and/or Canadian Cardiovascular Society Angina Class III-IV)