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Forum Home Cardiovascular Exercise Why do I need to do cardio?
Author Comment
Brooke
Registered:01/15/11
Posts: 53
02/10/11 at 03:06 PM
Why do I need to do cardio?
Muscle Prodigy
Registered:12/17/09
Posts: 0
02/22/11 at 01:39 AM
Your heart is a muscle plain and simple. You need to train your heart to be effective at pumping blood throughout your body.

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