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ive been addicted to white mochas lately and i cant seem to to go thru the day w/o one otherwise i fall asleep.
anywyas, does caffeine affect stamina? ill walk up some stairs and my heart will be pounding hella hard and ill be out of breath. or ill breakdance a bit and i have to sit down for like 5 minutes.
it constricts your blood vessles... theres less surface area for the oxygen to be absorbed... but the upside is the increased blood pressure needed to pump the blood around your body wakes you up.