Pfitzinger's Method — Your Pacer Wiki

Definition

Pete Pfitzinger — Olympic marathoner and exercise physiologist — codified a marathon-training method in Advanced Marathoning (with Scott Douglas) that has become a common reference for road marathoners training at 40 to 80+ miles per week. The method's distinguishing features are the medium-long run in the middle of the week, the systematic use of lactate-threshold workouts as the primary quality work, and the progression of marathon-pace segments embedded in long runs.

Pfitzinger's plans are structured around 12- or 18-week marathon build-ups with explicit volume targets and named workout types: general aerobic, lactate threshold, marathon pace, medium-long, long, recovery.

Why it matters

For experienced road marathoners — the runner who has completed at least one marathon and wants to run the next one faster — Pfitzinger's method offers a structure that is rigorous, evidence-based, and practical. It raises weekly volume steadily, places quality where the body can absorb it, and rehearses marathon pace in the long run so race day is not the first encounter with sustained marathon effort.

The method assumes consistent training history. Its weekly volumes are inappropriate for novices or athletes returning from an injury layoff. For athletes who meet the prerequisite — roughly one year of consistent running and one marathon already completed — it tends to produce reliable improvement.

For Your Pacer, Pfitzinger's method is the default dialect for road marathoners with at least one prior marathon and recent structured training. Its weekly architecture — medium-long Wednesday, long Sunday, threshold or tempo once a week, easy days between — integrates cleanly into the weekly-letter cadence.

What Your Pacer adopts

The medium-long run. A mid-week 15 to 20 km run at easy effort that extends weekly aerobic load without a second long effort on the weekend.
Marathon-pace segments in long runs during the build and peak phases.
Lactate-threshold work as primary quality. One weekly session at T-pace (or HR equivalent) through base and build, shifting to VO2max work in peak only if warranted.
Taper structure. Three-week taper with volume reduction and race-specific sharpening.

What Your Pacer adjusts

Mileage is expressed in duration / HR for runners without recent race anchors. A 20 km medium-long run at one runner's easy pace is 90 minutes; at another's, 140 minutes. Physiological time matters, not distance per se.
HRV and ATI / CTI inform recovery weeks beyond the book's fixed cadence.
The method is not prescribed to novices or runners whose AeT/AnT ratio suggests ADS — those athletes need base work before the Pfitzinger structure is appropriate.

Related terms

Long Run — the Sunday long run with marathon-pace inserts is a Pfitzinger signature.
Quality Session — lactate-threshold work is the method's primary quality type.
Periodization — the 12- or 18-week build cycle with defined base, build, peak, taper phases.
AnT — lactate threshold as the anchor of the method's quality prescription.