I found this article online on runnersworld.com. It's definitely worth posting. I was never a coffee drinker until I became a runner.
No more coffee guilt—caffeine boosts leg and brain power.
By Liz Applegate Ph.D. Image by Mitch Mandel
From the May 2009 issue of Runner's World
Run Longer, Think FasterIn a study done last year, researchers gave cyclists an energy bar with or without
caffeine (equal to one cup of coffee) before and during a long, hard ride. They found that cyclists who have caffeine ride farther and think faster on cognitive tests than the no-caffeine group—useful news to runners in endurance events and adventure races, where quick decision-making is key.
Increase Sprint SpeedConsider drinking a cup of coffee before your next
speed workout: Australian scientists gave fit athletes a 300-milligram dose of caffeine one hour before running five sets of 6 x 20-meter sprints. They found that runners who have caffeine sprint faster than those who don't have caffeine. Researchers think the stimulant enhances reaction time and running speed.
Recover More QuicklyRunners know they need carbs postrun to rebuild their glycogen stores, but a recent study suggests caffeine may also
enhance recovery. Cyclists rode hard for two consecutive days to drain their glycogen stores. They then drank a carb beverage with or without caffeine. Researchers found that having a drink with caffeine rebuilds glycogen stores 66 percent more than a carb-only drink.
Hydrate SmartMany people have heard caffeine causes dehydration. Most studies, though, show you can have up to 550 milligrams of caffeine (or about five cups of coffee) without affecting hydration levels. That means you can have quite a few caff einated sports drinks and gels while running without risking dehydration; more than 550 milligrams will have a diuretic effect.
Keep Bones HealthyA few studies have shown a link between bone-mineral loss and caffeine—but a close look at the data reveals that caffeine itself doesn't cause the mineral loss. Many coffee lovers may drink it in place of beverages rich in calcium (such as milk), and as a result, decrease their intake of this bone-strengthening mineral.