EXERCISE – BENEFIT TO HEART
The heart is a pump and regular, sustained exercise makes the heart work harder and so improves its efficiency.
The heart rate slows and the stroke volume — the amount pumped with each beat — increases. The coronary arteries dilate and become permanently wider.
Arteriosclerosis, or hardening of the arteries, is associated with a laying down of the atheroma or fatty tissue along the inner walls of the artery. This — like rust in a pipe — narrows the artery and can obstruct the blood flow. Widened arteries can take a great deal more build-up of atheroma before the narrowing obstructs the blood flow.
The lungs become more efficient and develop a greater capacity. But exercise also has other effects on the body.
Those who exercise regularly appear to become addicted to it. Certainly it gives a good reason for stopping smoking. You can’t really become fit while you continue to smoke.
Some experts have come up with a reason why those who push themselves hard with physical exercise seem to enjoy it despite the pain of aching limbs and a panting chest.
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