Patients will receive the Digoxin:It's the rhythm of the heart, if you have trouble breathing, you may be given oxygen to breathe more easily and more efficiently. Therefore, regular exercise improves cardiovascular performance by increasing the production capacity of oxygen consumption by increasing the strength of the heart to supply blood. (And oxygen) to the muscles. Heart blood drawn in the same amount as was evident in the ratio beating pulse rate and heartbeat slow down the intensity of exercise as well.