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VDOT for Runners
VDOT is a running-specific pseudo-VO2max value developed by legendary coach Jack Daniels. Rather than measuring oxygen consumption in a lab, VDOT estimates your effective aerobic capacity from race performance. It accounts for both VO2max and running economy, making it more practical for predicting race times and setting training paces than raw VO2max measurement.
Two runners with identical VO2max values may have very different race times if their running economy differs. VDOT captures this difference because it is derived from actual performance. A higher VDOT means you can run faster at a given effort level, whether from superior oxygen delivery or more efficient biomechanics.
Daniels' VDOT Formula
Where t = race time in minutes and v = running velocity in meters per minute. The Riegel formula (T2 = T1 x (D2/D1)^1.06) is then used to predict equivalent performances at other distances.
VDOT Reference Table
| VDOT | 5K | 10K | Half Marathon | Marathon |
|---|---|---|---|---|
| 35 | 27:40 | 57:36 | 2:07:30 | 4:26:00 |
| 40 | 24:08 | 50:03 | 1:50:26 | 3:49:45 |
| 45 | 21:18 | 44:06 | 1:37:22 | 3:22:10 |
| 50 | 19:03 | 39:22 | 1:27:05 | 3:01:00 |
| 55 | 17:10 | 35:30 | 1:18:44 | 2:44:30 |
| 60 | 15:36 | 32:14 | 1:11:42 | 2:30:30 |
Training Paces from VDOT
- Easy: 59-74% of VDOT pace for recovery and base building.
- Marathon: 75-84% of VDOT pace for specific long run pace.
- Threshold: 83-88% for lactate threshold improvement.
- Interval: 95-100% for VO2max development.
- Repetition: 105-110% for speed and economy work.
Frequently Asked Questions
Which race distance gives the best VDOT estimate?
A recent 5K or 10K provides the most accurate VDOT estimate. Marathon times can be affected by pacing, nutrition, and heat. Use a race from the past 4-6 weeks for best accuracy.
Why do my predicted times seem off?
If longer predictions seem too fast, your endurance may lag behind speed. If shorter predictions seem fast, you may have great endurance but room for speed improvement. Training should target your weakness.
How much can I improve my VDOT?
Beginners can improve 10-15 points in 1-2 years. Experienced runners gain 1-3 points per year. Gains come from both VO2max increases and running economy improvements through consistent training.