http://well.blogs.nytimes.com/2013/10/09/exercise-as-preventive-medicine/?_r=0

A structured exercise program may be as good or better than frequently prescribed drugs for some common cardiovascular ailments, a large meta-analysis has found.

Researchers evaluated 57 randomized trials testing the effect on mortality of exercise and drugs in four prevention regimens: the secondary prevention of coronary heart disease, rehabilitation from stroke, treatment of heart failure, and prevention of Type 2 diabetes. The review, published online in BMJ, involved more than 14,000 patients.

The studies used a variety of drugs — for example, statins for the prevention of coronary heart disease, blood thinners for stroke, diuretics for heart failure, and biguanides like Glucophage and Metaglip for impending diabetes.