How Exercise Affects Cardiovascular Health?

The physical exercise involves a series of responses from our body. If this is only done at one time, in isolation and this is not repeated in two or three weeks, talk of an "acute physiological response."In this response the body tries to meet the temporary needs of the physical effort, without causing any long-term adaptation to meet these needs.When physical exertion is repeated with a certain intensity, duration and periodicity in time, we face what we call a "training" means a chronic adaptation to better meet the needs.The biological effects that will take place on the heart are:• cardiac muscle hypertrophy (enlarged heart fiber).• Increase in the cavities of the ventricles.• Reduction in resting heart rate.• Appearance of electrocardiograph abnormalities consisting of basal repolarization abnormalities, conduction disorders and some type of arrhythmia, always benign and secondary to myocardial hypertrophy.All these changes result in what has been called "the athlete's heart syndrome" and is an expression of chronic heart adaptation to a continued demand in a given time and intensity of exercise.The extraction of oxygen by the heart from the blood is made "full" even at rest. During the year, to meet the increased requirements of oxygen, the heart does is "increase" the size of the vessels that carry blood, the coronary arteries.Another adaptation of the heart when performing regular aerobic training is a lengthening of the cardiac muscle fiber leading to an increase of the cardiac cavities, this is what is known as cardiomegaly. The consequences of this are enlarged in each ejection of blood, the volume thereof is increased and therefore the amount of oxygen carrying blood with each beat is increased.With respect to heart rate, with training it is reduced at rest, maximal exercise but this just increases.