Does drinking caffeine before exercising improve your performance?

Answered by Ingrid Ducmanis on Monday, June 1, 2009 at 12:14 PM filed under fitness postings
You figure that if a double latte can keep you alert at meetings, it can certainly enhance your workout. According to the American College of Sports Medicine (ACSM), having caffeine before exercise increases performance during prolonged endurance exercise and short-term intense exercise lasting approximately five minutes. A dose of three to nine milligrams (mg) of caffeine per kilogram of body weight (that's an average range of two to six cups of coffee) one hour prior to working out should do the trick. Caffeine has been shown to help release stored body fat so that it can be used as energy, explains Jack L. Smith, Ph.D., chair of the department of nutrition at the University of Delaware. But caffeine also acts as a diuretic, warns Smith, speeding urine production and dehydration, which robs your body of the water it needs for cooling. (The ACSM maintains that this immediate diuretic effect has yet to be conclusively supported by research.) Research suggests that the caffeine effect works best for those who are not regular caffeine drinkers. Doses of around 200 mg—a little more than a cup of coffee or 48 ounces of cola—have proven to boost performance, while doses above 400 mg may have the opposite effect.


Follow Us

Explore FitClick
Browse this section for quick links to our calorie counter and other popular diet and fitness features. From diet plans to weight loss programs, FitClick has the content you need to lead a healthy life. Find workout routines, a calorie calculator and more at your source for diet and fitness information.
We have updated our Privacy Policy, effective May 25, 2018. We have done this in preparation for the EU's new data privacy law, the General Data Protection Regulation (GDPR). Please take the time to review our updated documentation by clicking on the Privacy Policy link at the bottom of this page. By continuing to use this service on or after May 25, 2018, you agree to our updated Privacy Policy.