Your Pre-workout Coffee Might Not Be as Effective as You Think

Touted as an exercise enhancer, caffeine works only if you’re not a java junkie. A study in the International Journal of Sport Nutrition and Exercise Metabolism found that guys who chewed caffeinated gum while running sprint drills had delayed muscle fatigue if they were low caffeine users (consuming the equivalent of a cup of coffee a day or less).

Why Does Caffeine Make Me Tired?

“Repeated exposure to caffeine reduces a person’s sensitivity to its effects,” says Brendan Egan of Dublin City University. If you’re a coffee fiend, gradually taper consumption in the four days leading up to a sporting event, then drink your usual amount the morning of.

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