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My kind of doctor 5 comments
guest · 7 years ago
Kinda make sense but also doesn`t. The heart is a muscular organ so if you do increase your heart rate by exercise you working it out and making it stronger like any other muscle. If you compare it to a car, the faster you drive the car the more wear and tear it takes and it cannot replenish itself like a living tissue i.e muscle. Just my opinion :)
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