Does caffeine improve your workout?

Does caffeine improve your workout? Your genes may decide

Caffeine has been getting a lot of hype in recent years but does caffeine improve your workout? Even with a wealth of current research and literature backing the claims that caffeine is a good pre-workout supplement, there are people who disagree with its usage and/or disagree with its effectiveness. Muhdo have run a small research study to see what, if anything, they could find. But before that let us have a brief overview of caffeine.

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