Cardio exercises are great for you, but I’m confused. Since the heart is a muscle, does exercising it make it grow bigger, which could lead to heart disease?
My father has a enlarged heart and this question crossed my mind.
In: Biology
Have you ever seen a muscle bound runner? They are all pretty small because their body metabolizes muscle due to intense cardio. but their slow twitch fibers allow them to run forever. So I doubt running would make your heart grow.
Steroids do though.
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