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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https://aaptiv.com/magazine/pre-workout-drinks "Are Pre-Workout Drinks Healthy or Harmful?" > The caffeine and creatine that most of these drinks contain can also have harmful effects on the body. “Excessive caffeine can increase your heart rate and blood pressure, causing cardiac issues,” Woeckener notes.