A latest research says, exercising for four to five times a day, may help your heart stay healthy and slow down ageing.

Research showed that different arteries are affected differently by varying amounts of exercise.

While exercising for about 30 minutes, two to three days a week may be sufficient to minimise stiffening of middle-sized arteries, exercising for about four to five days a week is required to keep the larger central arteries youthful.

With age, arteries which transport blood in and out of the heart ecome prone to stiffening, increasing the risk of heart diseases.

The findings will help see "if we can reverse the ageing of a heart and blood vessels by using the right amount of exercise at the right time'.