Aerobic exercise reduces mortality:
Aerobic exercise done along with or without a cardiac rehab program reduces mortality in coronary artery disease. A systematic review and meta-analysis of randomized controlled trials by Taylor et al found that exercise based cardiac rehabilitation reduces all cause and cardiac mortality and improves a number of cardiac risk factors in patients with coronary heart disease according to a meta-analysis of 48 randomized controlled trials (RCTs) (8940 patients, mean age 55 y). Intervention duration ranged from 0.25–30 months and follow up was between 6–72 months. Patients who received exercise-based cardiac rehab had a significant reduction in all-cause mortality of 20% and cardiac mortality of 26% than did patients who received usual care. Groups did not differ for rates of non-fatal heart attack (odds ratio [OR]= 0.79), coronary artery bypass grafting (OR=0.87), or percutaneous coronary intervention (OR=0.81). Cardiac rehabilitation was associated with significant reductions in total cholesterol of 0.37 mmol/L and triglyceride concentrations by 0.23 mmol/L; no significant differences were seen in low ‘bad’ or high-density ‘good’ lipoprotein concentrations. Systolic blood pressure was significantly reduced by 3.2 mm Hg. A significant 36% reduction in patient smoking was reported with cardiac rehabilitation. (29)
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