In this updated review, the authors included 63 trials that studied a total of 14,486 people with coronary heart disease. The trials show that patients who have exercise-based cardiac rehabilitation have 0.74 times the risk of cardiovascular mortality (95% confidence interval (CI) 0.64 to 0.86, 27 trials) compared with those who do not exercise. The overall risk of hospital admissions was also reduced (relative risk 0.82, 95% CI 0.70 to 0.96, 15 trials). However, there was no reduction in total mortality. The authors recognised that the patients included in these trials consisted of predominantly low risk individuals and that further trials assessing high-risk populations are needed.
Anderson L et al. Exercise-based cardiac rehabilitation for coronary heart disease. Cochrane Database of Systematic Reviews 2016;Issue 1