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However, several studies conclude that seanbonner no changes occurred in core temperature, sweat loss, plasma volume, urine volume or body hydration status during exercise following caffeine ingestion (5,6). The Chemistry of Caffeine The exact mechanism(s) of caffeine's ergogenicity remains unclear. More research is needed to fully elucidate the answer; however, three main theories exist. Central Nervous System This explanation involves the central seanbonner nervous system (CNS). Caffeine stimulates the CNS, which would seanbonner positively affect the athlete in two ways: through perceived exertion and through increased neural activation of muscle contraction. Explained in more simple terms, caffeine ingestion may help the athlete 素eel' better and more alert. So a boost of caffeine might make mile 19 of a marathon or starting the third leg of a triathlon feel not as hard. Along with this enhanced focus and clear-headedness, caffeine affects the CNS by stimulating the nerves to fire muscles into action more effectively.
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