VDOT

VDOT is a measure of running ability and is calculated from a race performance based on Jack Daniels Running Formula. The number reflects the V̇O₂max of a runner with average Running Economy. It is possible for a runner's actual V̇O₂max to vary from the VDOT measure; two runners could have the same VDOT and one runner could have a higher V̇O₂max with a poorer Running Economy, the other lower V̇O₂max with a better Running Economy. For most purposes, VDOT is more useful than V̇O₂max as it reflects actual running performance rather than a laboratory measure.

1 Meaning of "VDOT"

Note that VDOT is not an acronym, but an abbreviation of V̇O₂max which is properly pronounced "V-dot-O₂max" (note the dot above the V).

2 VDOT and Jack Daniels Running Formula

VDOT is at the heart of Jack Daniels Running Formula. Jack Daniels' plans are based around calculating the ideal training paces based on previous race performance. The faster you are in a race, the faster you need to train. Jack Daniels book provides tables of race performances to use to look up a VDOT number. This VDOT number is then used to look up training paces for his plans. I would recommend reading Jack Daniels Running Formula, but the calculations are easier with the VDOT Calculator.