Cardiovascular disorders come first in the world as far as lethality and invalidization of people are concerned.
In the recent years there has been an awakening to the need for a more systematized approach to the problem of physical exercise. Particularly, individuals in the over-thirty years age bracket are having routine exercise prescribed by their physicians as a preventive measure against heart desease and other associated cardiovascular disorders. Numerous recent publications have recognized a correlation between physical fitness and exercise and have delineated detailed regimens or programs of physical exercise intended to yield the desired results. This physical exercise must be performed only under medical supervision with constant checks on physical loads and the physical activity of the exerciser.
Besides, in the course of medical examination it is often necessary to know about a person's heart activity when the person is subjected to various physical loads.