Researchers in Brazil gave people 400 milligrams of caffeine . . . which is roughly like four small cups of coffee, or two Five Hour Energy drinks. And they performed about 3% better than they did without caffeine.
Obviously 3% doesn’t sound like much, but a little boost like that can make a big difference after a while. And it also helped burn more fat.
Previous studies had found that caffeine can give you a workout boost, but only if you hadn’t had any for several days beforehand. This one found it doesn’t matter. Even if you drink coffee every day, it still works.
400 milligrams of caffeine is the upper limit of what you’re supposed to have per DAY though. So if you want to try it, you should only drink coffee before your workout, and skip it the rest of the day.
The people in the study didn’t actually drink coffee though. They took caffeine PILLS, which is probably the less pukey option. (New York Times)