VDOT Explained: How Jack Daniels Turns One Race Into Every Training Pace
What VDOT is, how Jack Daniels' Running Formula turns one race into easy, marathon, threshold, interval and repetition paces, and where it misleads.
VDOT is a single number that takes one race result and hands you every training pace you need. Here is what it means, why it works, and where it falls down.
What VDOT is
VDOT comes from Jack Daniels, the exercise physiologist behind Daniels' Running Formula, and his earlier work with Jimmy Gilbert. The notation is shorthand for V̇O₂max, where the dot means "per minute". True VO₂max is your maximum rate of oxygen use and needs a lab to measure.
Daniels' insight: you do not need the lab. Race speed already reflects your aerobic engine and your running economy together. VDOT is a performance-based VO₂max, the effective number that explains your race time once economy is folded in. Two runners with the same lab VO₂max but different economy get different VDOT values, because they race at different speeds. It is anchored to something you can verify any weekend: a race.
One race in, five paces out
Enter a recent all-out result and the model returns a VDOT and five training paces:
- Easy (E): conversational aerobic running for base and recovery.
- Marathon (M): the pace you could hold for 42.2 km.
- Threshold (T): comfortably hard, around your lactate threshold, as tempo runs or cruise intervals.
- Interval (I): hard running near VO₂max in repeats of 3 to 5 minutes.
- Repetition (R): short, fast reps for speed and mechanics, with full recovery.
Each pace maps to a physiological purpose. The model decides how fast so you can focus on showing up.
VDOT
49.8
Daniels 러닝 피트니스 점수
| 존 | 범위 | 무엇을 단련하는가 |
|---|---|---|
| E | 쉬움 / 롱런 4:54–5:53 /km | 유산소 기초, 모세혈관, 지방 대사; 주간 볼륨의 대부분. RPE 3–4, 대화 가능. |
| M | 마라톤 4:26–4:51 /km | 마라톤 특화 지구력과 경제성. RPE 5–6, 꾸준함. |
| T | 역치 4:16–4:28 /km | 젖산 역치; 편안하게 힘든 템포와 크루즈 인터벌. RPE 7, 약 1시간 레이스 강도. |
| I | 인터벌 3:51–4:01 /km | VO₂max; 3–5분 강한 반복. RPE 9, 힘듦. |
| R | 리피티션 3:19–3:42 /km | 스피드, 경제성, 러닝 파워; 충분한 회복과 함께하는 짧고 빠른 반복. RPE 9–10, 빠르고 통제됨. |
E · 쉬움 / 롱런. 유산소 기초, 모세혈관, 지방 대사; 주간 볼륨의 대부분. RPE 3–4, 대화 가능.
M · 마라톤. 마라톤 특화 지구력과 경제성. RPE 5–6, 꾸준함.
T · 역치. 젖산 역치; 편안하게 힘든 템포와 크루즈 인터벌. RPE 7, 약 1시간 레이스 강도.
I · 인터벌. VO₂max; 3–5분 강한 반복. RPE 9, 힘듦.
R · 리피티션. 스피드, 경제성, 러닝 파워; 충분한 회복과 함께하는 짧고 빠른 반복. RPE 9–10, 빠르고 통제됨.
- 당신의 VDOT 49.8은 현재 러닝 체력을 담아낸 단일 수치입니다(러닝 경제성을 반영해 조정한 'VO₂max'). 모든 훈련 페이스가 여기서 도출됩니다.
- VDOT는 최근의 강도 높은 레이스나 타임 트라이얼 하나에서 나옵니다. 전력을 다해 레이스한 결과를 사용하세요. 이상적으로는 5 km 이상이며, 하프 마라톤이나 10 km가 가장 안정적인 추정치를 줍니다.
- 단위 토글을 전환하면 마일당 페이스로 볼 수 있습니다. 체력이 향상되면 다시 레이스하세요. VDOT와 모든 페이스가 갱신됩니다.
- 이것은 다니얼스의 개별 훈련 페이스(E, M, T, I, R)이며 연속된 존이 아닙니다. 각 페이스를 특정 목적에 맞춰 달립니다. 더 힘든 페이스(T, I, R) 사이의 간격은 오류가 아니라 의도된 것입니다.
당신의 개인 맞춤 결과가 담긴 PDF와, 언제든 다시 열 수 있는 QR 코드.
Why VDOT works
It is self-calibrating. The input is a race, so the output already accounts for your economy, your event and the conditions. You are not estimating a percentage of an estimated maximum heart rate.
Every pace has a job. Threshold work clears lactate, interval work stresses VO₂max, repetition work sharpens mechanics.
It is portable across distances. Daniels' tables use the same race-equivalence idea Pete Riegel formalised: a strong 5K predicts a credible 10K or half. The race time predictor does the same.
Where VDOT can mislead you
1. It assumes a balanced, well-trained runner. A fast-twitch 800m runner gets a flattering VDOT from a 5K and then fails at the predicted marathon pace. A pure ultra runner sees the opposite. The further the goal race sits from the input race, the more the prediction drifts.
2. Garbage in, garbage out. A race on tired legs, in heat or on hills understates you. A downhill or perfectly paced PR flatters you. Use your most representative recent effort.
3. Paces are not zones, and they ignore the day. VDOT knows nothing about today's fatigue, altitude or headwind. A heart-rate or RPE check stops an easy run turning into a threshold run by accident. Many runners pair VDOT paces with heart-rate zones for this reason.
How to use it
Race something in the last few weeks, ideally close to your goal distance. Drop the result into the VDOT calculator and build your week around the five paces: most volume Easy, a weekly Threshold session, Interval or Repetition work as the race nears, Marathon pace if you are aiming long. Re-test every four to six weeks so the paces move with your fitness.