⚠️ Safety Note: Caffeine can be dangerous and should be used at your own risk. Talk to a medical professional if you have concerns and test any plan in training.
Plan your caffeine strategy for ultras and long races. Add your planned doses, and see how caffeine levels build up and decay based on half-life modeling. Helps you visualize when you'll peak and what levels you'll have at the finish.
Race Details
e.g., 6:00 AM or 18:00
kg
lbs
Typical range: 3-7 hours. Default 5.
Caffeine Doses
Add your planned caffeine intake throughout the race. Common sources: caffeinated gel (25-50mg), high-caff gel (75-100mg), cola 12oz (35mg), coffee 8oz (95mg), caffeine pill (100-200mg).
Caffeine Strategy
Summary
Total Caffeine
0 mg
Peak Level
0 mg
Level at Finish
0 mg
Effective Range
-
(3-6 mg/kg)
Dose Timeline
No doses added yet. Add caffeine doses above to see your timeline.
How it works:
Caffeine blood levels are modeled using exponential decay with your specified half-life. Each dose adds to the current level, and the total decays over time. The graph shows estimated active caffeine throughout the race. The effective dose range for performance benefits is typically 3-6 mg/kg body weight.
Caffeine blood levels are modeled using exponential decay with your specified half-life. Each dose adds to the current level, and the total decays over time. The graph shows estimated active caffeine throughout the race. The effective dose range for performance benefits is typically 3-6 mg/kg body weight.
⚠️ Disclaimer: This tool is for planning purposes only. Individual responses to caffeine vary significantly based on genetics, tolerance, and other factors. Caffeine affects sleep, heart rate, and GI function. Test your caffeine strategy in training before race day.