Does caffeine help when you exercise? A spark note raises the question at www.sparkpeople.com/resource/fitness_artic
Seems that, perhaps by keeping the arteries that feed the heart muscle directly in a state of partial contraction, caffeine does not permit the same increase in blood flow to the heart muscle that would happen during exercise if there were no caffeine aboard. The suggested conclusion would be that caffeine diminishes max performance. The big risk here, might be that caffeine could make marginal flow through clogged heart arteries even smaller, leading to chest pain and possible heart damage. This was not mentioned.
The article talked only about blood flow to the heart, and did not mention whether there was any change in athletic performance as a result of taking caffeine (yeah - they used caffeine pills in the study -- no Starbucks fancy blends here). They do mention, though, that folks taking caffeine are more focused. Maybe that fact alone would improve athletic performance.
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