Answer:
How often? 2 times a day or minimum 1 times. How hard? depends on age.If the person is below 30, he/she can have a hard workout. How long? 1 or 2 hours per exercise is enough and ideal for everyone.
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Explanation:
Its just that the body is responding to it differently
The heart itself needs blood and nutrients to work properly and gets its share of blood supply from coronary arteries. Coronary heart diseases are linked to coronary arteries. The diseases of coronary arteries are very dangerous; coronary artery diseases like atherosclerosis may cause heart attack.
Chronic bronchitis and emphysema
