- Pre-existing severe medical conditions precluding participation in a physical activity program as determined by the local investigator. Such conditions include: chronic heart failure (greater than NYHA II), recent myocardial infarction (less than 3 months ago), unstable angina pectoris, clinically significant arrhythmias, uncontrolled hypertension with repeated systolic blood pressure above 160mmHg, and COPD (requiring oxygen supply or GOLD stadium greater than 2).