Table 2 Inclusion and Exclusion criteria

Inclusion Criteria

 • Patient over the age of 18

 • Ability to understand and speak English

 • Ability to understand the study protocol and able to provide informed consent

 • Admitted to hospital and diagnosed with an acute coronary syndrome and have documented coronary artery disease on coronary angiography (coronary artery stenosis >50% in at least one coronary artery) treated either medically or with percutaneous coronary intervention

 • Have low level of physical activity, defined by not meeting recommended weekly exercise targets.

 • Personal ownership of a smartphone able to run the Fitbit application

 • Agreement to complete cardiac rehabilitation program.

Exclusion Criteria

 • Inability or unwillingness to provide informed consent

 • Significant residual coronary artery disease requiring planned revascularisation

 • Unstable angina

 • Blood pressure > 180/110 or symptomatic orthostatic blood pressure decrease >20 mmHg

 • Uncontrolled ventricular or atrial arrhythmias

 • Musculoskeletal or medical problems resulting in significant exercise limitation

 • Significant medical co-morbidities with life expectancy of less than one year

 • New York Heart Association (NYHA) Functional class III-IV

 • Current illicit drug or alcohol use or dependence that in the opinion of the principal investigator would interfere with adherence

 • Clinical signs of cognitive impairment