Why is it necessary to do a 2 minute cool down after performing a cardio exercise?
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When you’re doing cardio, all your muscles in your legs and core are constantly squeezing to help put pressure on your veins to push the blood back into the heart. If you suddenly stop, there is a chance that for a few seconds, your heart will get drastically diminished venous return, but will still keep beating fast. So you’re basically starving your heart and brain of vital blood perfusion, and if this happens for more than a few seconds, you will feel dizzy or might pass out.
This phenomenon is called exercise-associated collapse (EAC).
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