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Caffeine: The World's Favorite Pre-Workout

2026-02-08
Sarah Jenkins

How it Works

Caffeine blocks Adenosine (the "tired" molecule) in the brain. It increases adrenaline and focus. It reduces pain perception.

Dosage & Timing

Dose: 3-6mg per kg of bodyweight. (e.g., 200-400mg for a 180lb male).
Timing: Take 30-45 minutes pre-workout.
Warning: The half-life is 5 hours. Taking it at 6 PM means it's still 50% active at 11 PM. Fitblues advises morning/afternoon use only.

Cycling

You build tolerance fast. Fitblues suggests a "Caffeine Deload" week every 8 weeks to reset sensitivity.

Conclusion

Use it as a tool, not a crutch. Respect the bean.

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Caffeine: The World's Favorite Pre-Workout | Fitblues Blog | Fitblues AI Coach