Coffee and sport: what the research says about caffeine
In short: Research reviewed by Simon Higgins found that 3 to 7 milligrams of caffeine per kilogram of body weight was linked to a 24% increase in endurance during cycling or running tests. A cup of coffee contains roughly 75 to 150 milligrams of caffeine, and coffee caffeine may have effects comparable to pure caffeine.

Coffee and sport are often mentioned in the same breath. Researchers at the University of Georgia looked into the connection. Research looked at caffeine and sporting performance. Simon Higgins studied 600 scientific articles on the effects of coffee. He focused on the links between caffeine consumption and athletes’ endurance. In nine follow-up experiments, in which participants had to cycle or run, he looked at the endurance levels of the test subjects. Higgins found that 3 to 7 milligrams of caffeine per kilo of body weight was linked to an increase in the participants’ endurance of 24%. A cup of coffee contains roughly 75 to 150 milligrams of caffeine. According to Higgins, more research should be carried out into coffee as a source of caffeine. He says the effects of caffeine from coffee can be just as high as the effects of pure caffeine, while the general assumption is that they’re lower. Via DeMorgen and Uga.edu