REF-815 · Billat, 2001 · Sports Medicine, Vol. · Paper · PubMed

Interval Training for Performance: A Scientific and Empirical Practice. Special Recommendations for Middle- and Long-Distance Running. Part I: Aerobic Interval Training

C+thin evidenceMeasured on a mixed groupWritten before October 2026, being re-checked

A review tracing the history of scientific and empirical interval training. Interval training is defined as repeated short to long bouts of rather high intensity (at or above maximal lactate steady-state velocity) with recovery periods of light exercise or rest. It was first described by Reindell and Roskamm and popularised in the 1950s by Emil Zatopek.

Coaches have used race velocities from 800 to 5000m to calibrate intervals without physiological markers; the author argues that outside the competition season it seems better to use velocities tied to particular physiological responses, from maximal lactate steady state to absolute maximal velocity, and that the range of velocities in a race must be considered, since even world records are not run at a constant pace.

Participants

No participants: narrative review. Abstract available, but it contains no study data.

Protocol

Narrative, historical and physiological review of aerobic interval training for middle- and long-distance running (Part I of a two-part review). No systematic search is described in the abstract.

Key Results

Definition: interval training = bouts of fairly hard exercise, short or long, at or above the velocity of maximal lactate steady state, repeated with recovery periods (rest or light exercise) between them.
History: first described by Reindell and Roskamm; popularised in the 1950s by Emil Zatopek.
Coaches have set interval speeds from specific race velocities between 800 and 5000m, with no reference to physiological markers.
Author's position: away from the racing season, anchoring intervals to velocities tied to specific physiological responses — anywhere from maximal lactate steady state up to absolute maximal velocity — appears preferable.
The range of velocities used in a race must be considered, since even world records are not run at a constant pace.

Practical Application

"Should I set my interval speeds from race pace or from test results?" — this narrative review of interval training for middle- and long-distance running (no pooled data) argues that outside the competition season intervals are better set from physiological markers, from maximal lactate steady state up to maximal velocity, than from race-distance speeds alone, and that race-specific work should reflect that races are not run at a constant pace.
Off-season: anchor interval speeds to tested markers in the range from maximal lactate steady state to maximal velocity; in-season, race-pace work regains its place.
Include pace variation in race-specific sessions; even world-record races are not evenly paced.
Not from this paper; the base's own practice: the tested training study at the velocity associated with maximal oxygen uptake from the same author is REF-005; a randomised comparison of two interval intensities is REF-813; interval shape is in SYNTH-33.

Limitations

Narrative, single-author review; its recommendations are the author's synthesis, not tested here.
The abstract has no speeds, durations, rest periods or outcomes; content is limited to the abstract's definitions, history and position.
Written from the abstract and record metadata only (full text not read).
How this entry was checked and changed
Why this level

narrative review without systematic method; the abstract carries no data