FreeImgFix.VDOT
2026 Updated

Scientifically Analyze
Your Running Level

Check your VDOT Score, Training Paces, and Heart Rate Zones all in one place.

Recent Race Performance

HR
MIN
SEC

Heart Rate Info

Optional

* Inputs calculate personalized training HR zones using the Karvonen formula.

Why is VDOT Important?

To improve your running performance, it's crucial to train at the appropriate intensity for your current fitness level, rather than just running fast haphazardly. VDOT (V-dot-O2-max) is an index developed by legendary running coach Jack Daniels to quantify a runner's aerobic capacity, providing a guideline for efficient, injury-free training.

🎯 Injury Prevention

Overtraining is the main cause of injuries. Adhering to the VDOT-prescribed Easy Pace allows you to build mileage safely.

📈 Efficient Training

You can accurately set the intensity for Interval and Threshold training based on your goal race distance, leading to faster progress.