訓練前咖啡因計算機：運動表現最佳劑量與時機

The World's Favorite Drug: Caffeine

Caffeine is arguably the most potent legal ergogenic aid available. It blocks Adenosine Receptors in the brain, reducing the perception of effort and pain. This allows you to push harder for longer.

Ergogenic Benefits

* Strength: Increases power output (slightly) and muscular endurance (significantly). * Cardio: Improves time to exhaustion by mobilizing fatty acids. * Focus: Heightens alertness and reaction time.

🧪 Optimal Dosage Strategy (3-6mg/kg)

The "sweet spot" identified by the ISSN is between 3 to 6 mg per kg of body weight. * Light Users: Start at 3mg/kg. * Heavy Users: May need up to 6mg/kg. * Warning: >9mg/kg provides *no extra benefit* but significantly increases side effects (anxiety, jitters, GI distress).

☕ Body Weight vs. Caffeine Dosage

| Weight (lbs / kg) | Beginner (3mg/kg) | Advanced (6mg/kg) | Dangerous limit (>9mg/kg) | | :--- | :--- | :--- | :--- | | 130 lbs / 60 kg | 180 mg | 360 mg | 540+ mg | | 160 lbs / 72 kg | 215 mg | 430 mg | 650+ mg | | 190 lbs / 86 kg | 260 mg | 515 mg | 775+ mg | | 220 lbs / 100 kg | 300 mg | 600 mg | 900+ mg |

🧬 Genetic Factors (CYP1A2 Gene)

Your liver enzyme *CYP1A2* dictates how fast you metabolize caffeine. * Fast Metabolizers: Clears quickly. Benefit most from pre-workout caffeine (30-60 mins prior). * Slow Metabolizers: Caffeine lingers (8-10+ hours). High doses may actually *decrease* performance by causing anxiety.

Tolerance & Cycling

If you need 600mg just to "feel it," your adenosine receptors are downregulated. * Reset Protocol: Take 5-7 days off caffeine completely. Expect headaches for 2 days. When you return, 200mg will feel like 600mg again.

Frequently Asked Questions

Q: Pills vs. Coffee? A: Anhydrous Caffeine (pills/powder) is absorbed faster and is more reliable for dosing. Coffee varies wildly in caffeine content bean-to-bean.

Q: Can I mix with Creatine? A: Yes. Old myths claimed they cancel out. Modern research shows they are synergistic for power output.