Outcome measures: Variables pertaining to RA, CVD and PA will be measured in all subjects (CON, CRH) at two different time points during the study. Specifically, the subjects will be assessed at baseline (week-0) and then be reassessed post 12-week intervention (week-13). The post CR intervention assessment will be conducted 72 hours after the completion of the final exercise session. The variables that will be measured at week-0 and week-13 are listed in section B1e and the tools used to assess these outcomes are described below. Of note, the physicians/nurse conducting the assessments will be blinded in regards to which group the subject is assigned to.