Free Training Tools

Analyze your real heart rate data to find your thresholds and build personalized training zones. No formulas. No guesswork.

Free AeT Calculator & Heart Rate Zone Builder for Runners

Free AeT calculator, aerobic threshold test, LTHR calculator, and heart rate zone builder for runners. Analyze cardiac drift from your Strava data to find your real training zones.

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Resources

Practical checklists and resources to help you prepare for and execute your best race.

What to Carry on Mountain Training Runs

The gear you actually need for big training days in the mountains. What to carry, what to skip, and how to keep your pack light.

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Ultramarathon Preparation Checklists

Checklists for gear, nutrition, physical readiness, and mental preparation—designed for mountain 100-milers but applicable to any ultra.

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