I’ve always avoided caffeine before exercise because I’ve worried about overexerting myself and getting an injury from going all out. I wonder if there’s research on this factor?
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I know a lot of people who spend way too much time trying to optimize supplements and other tiny details instead of throwing down and getting on with your life.
Edit: after reading other comments yours makes more sense, but I'd still be more worried about what's actually in a pre-work out beverage than over-exertion.