That cup of coffee that many gym rats, bikers and runners swill before a workout does more than energize them. It kills some of the pain of athletic exertion, a new study suggests. And it works regardless of whether a person already had a coffee habit or not.
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"What we saw is something we didn’t expect," Motl said. "Caffeine-naïve individuals and habitual users have the same amount of reduction in pain during exercise after caffeine (consumption)."
https://news.yahoo.com/s/livescience/20090331/sc_livescience/coffeelessensthepainofexerciseoldId.20090401173939868
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