If done enough and properly exercise may reverse damage to sedentary ageing hearts say researchers adding that it may also help prevent risk of heart failure in future. To reap the most benefit the exercise regimen should begin by late middle age (before age 65) when the heart apparently retains some plasticity and ability to remodel itself. In an earlier study researchers found that the exercise needs to be performed four-to-five times a week. Based on a series of studies performed by our team over the past five years this 'dose' of exercise has become my prescription for life said