Dark Chocolate May Improve Endurance Performance

Dark chocolate is high in flavonoids that increase nitric oxide— an important chemical secreted by the inner lining of the blood vessels that controls blood flow. A small study by British researchers showed that feeding dark chocolate before exercise to recreationally trained cyclists improved endurance performance during a bike ride at 80 percent of maximum effort, and during a two-minute maximal time trial. The results were compared to identical exercise sessions after consumption of white chocolate. (Journal International Society Sports Nutrition, 12:47, 2015)

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