"We need to dig deeper into how the combination of caffeine and exercise is exerting its influence at the cellular and molecular levels, identifying the underlying mechanisms," says researcher Allan Conney, director of Rutgers University's Cullman Laboratory, in a news release.  "With an understanding of these mechanisms we can then take this to the next level, going beyond mice in the lab to human trials."

"Americans get more of their antioxidants from coffee than any other dietary source. Nothing else comes close," says study leader Joe Vinson, Ph.D.