Q: I am 17, I am not overweight nor do i have asthma, my parents are fit and healthy. I'll run for a minute and i'll be out of breath for the next 5 minutes.
A: because it places alot of stresses on your heart and lugs..thus increases its workload to provide or compensate for the increase in oxygen demand of your body..ur body needs to adapt for it to be able to tolerate a more strenuous workout
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