Highlight the effects of regular exercise on circulatory system

cbse-class-11

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Highlight the effects of regular exercise on circulatory system.


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Effects of Regular Exercise :
Regular exercise by an individual over a considerable period of time has far-reaching effects on the circulatory system of our body. These can be listed as under :
(a) Regular exercise keeps sugar level in control and prevents diabetes.
(b) The risk of increase in B.P, and heart attacks is reduced in a trained person due to the control on cholesterol level in the blood as a result of regular exercise. Cholesterol deposits along the arteries block our blood flow and are a major cause of heart attacks. Therefore, even heart patients are advised to do moderate exercise to keep the cholesterol (fat) level in check.
© Inactive capillaries in an athlete open up especially in the lungs that contribute to the efficiency of his movements in exercise.
(d) The ability to tolerate the presence of waste products such as lactic acid also increases in a person. Therefore, the chances of having pain, stiffness, etc. are reduced in a trained person.
(e) A regular exercising person can come to normal or relaxed state quickly after a heavy schedule of exercise because of his improved circulatory system.
(f) Regular exercise also leads to an increase in the number of red blood corpuscles of a person. This results in his better oxygen¬carrying capacity and, therefore, a lesser strain of load during exercise. Increase in red blood corpuscles also improves the colour of skin.
(g) As a result of regular exercise, the increase in heart rate during exercise is much less as compared to a person who does not exercise regularly. Due to this, a trained person can reach a higher achievement level.
(h) As a result of regular exercise, new capillaries are formed in our body that result in better circulation in the body. This increase in the number of capillaries is felt in more colourful (reddish) appearance of skin.
(i) Because of the muscles becoming strong, sometimes the size of the heart increases a little, resulting in an athlete’s heart. This should not be confused with a diseased heart which increases in size due to the lack of muscle strength and is also termed as an athletic heart.
(j) Regular exercise has a very healthy effect on our heart. As the load of exercise falls directly on the heart, its muscles become strong with the result that it can pump more blood into circulation on every contraction of its ventricles. In other words, its stroke volume increases.