REF-509 · Filipas et al., 2022 · Scandinavian Journal of Medicine & Science in Sports, Vol. · Paper · PubMed · Free full text
Effects of 16 weeks of pyramidal and polarized training intensity distributions in well-trained endurance runners
Seasonal TID SEQUENCING
Participants & Protocol
n=60 well-trained male runners; a 16-week block; total training load was held constant between groups (isolated manipulation of ONLY the intensity distribution)
4 groups: PYR (pyramidal for 16 weeks), POL (polarized for 16 weeks), PYR→POL (8 weeks pyramidal, then 8 weeks polarized), POL→PYR (8 weeks polarized, then 8 weeks pyramidal)
Zone shares per group (full text, checked 2026-09-27): PYR ~78/15/7, POL ~80/6/14 (low / moderate / high in the 3-zone model)
Testing pre/mid/post: body mass, speed at 2 and 4 mmol/L lactate (vBLa2, vBLa4), absolute and relative VO2peak, peak HR, peak lactate, RPE, 5-km TT
Protocol
Four-arm training intervention over a 16-week block: sixty well-trained male runners divided into four groups; the allocation method is not stated in the abstract (from the abstract).
PYR and POL trained with a pyramidal or polarized distribution for all 16 weeks; PYR → POL and POL → PYR split the block into two 8-week phases, starting with one distribution and switching to the other.
Isolated manipulation of training intensity distribution: training load was kept constant.
Tests pre-, mid- and post-intervention: body mass, vBLa2, vBLa4, absolute and relative VO2peak, 5-km running time trial (peak heart rate, lactate peak and rating of perceived exertion also analysed).
Key Results (verified against published abstract, DOI 10.1111/sms.14101)
Significant group×time interactions for relative VO2peak (p<0.0001 in the abstract; p = 0.0004, F(6, 112) = 4.5, in the Results; corrected 2026-10-12, full text), vBLa2 (p<0.0001), vBLa4 (p<0.0001) and 5-km TT (p=0.0001)
The PYR→POL group showed the largest improvement in all these variables (abstract; the full-text table shows POL→PYR equal on relative VO2peak, +3.0%): ~3.0% relative VO2peak, ~1.7% vBLa2, ~1.5% vBLa4, ~1.5% 5-km TT
IMPORTANT nuance: *each* of the 4 interventions effectively improved endurance surrogates and performance — PYR→POL maximized the effect, rather than being the only one that worked
NO significant interactions for body mass, absolute VO2peak, peak HR, peak lactate, or RPE
Relative VO2peak is the only physiological correlate of the performance improvement
% change by group (full text, checked 2026-09-27 — pre→post, mean±SD)
| Parameter | PYR | POL | PYR→POL | POL→PYR |
|---|---|---|---|---|
| VO2peak (rel.) | +1.3±2.2 | +2.1±3.0 | +3.0±2.8 | +3.0±2.7 |
| Speed @2 mmol/L | +0.6±0.7 | +1.3±1.3 | +1.7±0.7 | +0.9±0.9 |
| Speed @4 mmol/L | +0.6±0.6 | +1.2±1.1 | +1.5±0.7 | +0.9±0.8 |
| 5-km TT (time) | −0.6±0.6 | −1.1±1.1 | −1.5±0.7 | −0.9±0.8 |
Mechanism / Interpretation
Inference, not tested: early phase — more moderate intensity (pyramidal) to develop the base/thresholds → late phase — a shift toward high intensity (polarized) for "sharpening." Consistent with classical periodization and progressive overload of intensity.
POL→PYR (the reverse order) did NOT confer the same advantage on the threshold and 5-km variables — the direction of the transition matters.
Practical Application
In 60 well-trained male runners training 16 weeks at constant load, all four intensity distributions (pyramidal, polarized, and the two 8+8-week sequences) improved thresholds and 5-km time, but pyramidal-then-polarized improved most (tied with the reverse order on relative VO2peak): ~3.0% relative VO2peak, ~1.7% vBLa2, ~1.5% vBLa4 and ~1.5% 5-km TT — so when planning a block, start with the pyramidal share of threshold work and shift to a polarized distribution as the target race approaches.
It is not mandatory to go from "purely pyramidal" to "purely polarized" — one can simply become progressively more polarized while retaining an overall pyramidal character (comment by co-author Gallo in a newsletter, not from the paper)
All 4 approaches work — but if there is a choice about order, PYR→POL maximizes adaptation
Tested in runners; for a cyclist, apply the sequencing principle as inference
Limitations
Only men, well-trained runners — direct transfer to women/cyclists/less-trained requires caution
16 weeks — a single macrocycle, not a full annual season; long-term (multi-season) durability of the effect is not tested
Effect sizes are small (~1.5-3%) with overlapping SDs — statistically significant by group×time, but the practical difference between PYR→POL and "just POL" is modest
Total load was held constant — in real periodization volume also changes, which was not modeled
Source of discovery: KnowledgeIsWatt #171 (Gallo, a co-author of the paper) — a secondary popular account; the abstract-level data here are verified against the primary source (DOI 10.1111/sms.14101); the per-group table and zone shares are from the full text. The newsletter erroneously stated the year "2021" → the correct print year is 2022 (epub Nov 2021).
How this entry was checked and changed
Why this level
regraded 2026-09-27 from A: RCT, n=60
Content correction 2026-09-27
Sport "cycling, running" -> running (study in runners; cycling transfer is inference).
Per-group % table, zone shares (~78/15/7, ~80/6/14), VO2max ~67 and age ~38 -> marked "full text; not checked against the abstract".
Card lead rewritten to the abstract's finding (all four arms improved; PYR→POL largest, ~3.0/1.7/1.5/1.5%).
Cross-references to duplicate stubs repointed to their canonical entries (REF-085->REF-303, REF-093->REF-304); the stubs were emptied on 2026-09-27.
Cross-reference descriptions checked against the cited entries' current content; wrong years, wrong entries and claims the cited entry does not make were corrected.
Lines labelled "full text; not checked against the abstract" were checked against the open-access full text (PMC9299127): every number in them appears there; relabelled "full text, checked 2026-09-27".
Lines labelled "full text; not checked" were read against the open-access full text (PMC9299127): 1 confirmed and relabelled.
Resync 2026-09-28: Said PYR→POL improved most in all variables though its own table shows POL→PYR equal on relative VO2peak -> the tie is stated.
2026-09-28: added Protocol from the abstract (PubMed PMID 34792817, DOI 10.1111/sms.14101).
2026-10-01: cross-reference repointed from a merged framework to the one that replaced it (SYNTH-01→31, 05→34, 09→70, 12/15→32, 19→26).
Full text (checked 2026-10-12)
Participants (38 ± 7 years, relative VO2peak 67 ± 4 ml·kg−1·min−1) needed relative VO2peak >60, more than five sessions per week and >2 years of running, and were randomly allocated after pre-tests by balanced permutations in a 1:1:1:1 ratio, matched for age, relative VO2peak and 5-km time (full text).
The 16 weeks (December 2019 to March 2020, base period) were two 8-week mesocycles of 3 + 1 micro-cycles, with weeks 4 and 12 reduced by 30% and weeks 8 and 16 reduced by 40% in load (full text).
In the pyramidal week the Tuesday session was 20 min Z1 + 55 min Z2 and the Friday session 20 min Z1 + Z3 intervals such as 12 × 2 min (r. 1 min Z2), 4 × 7 min (r. 3 min Z2) or 3 × 12 × 40 s; the polarized week replaced the Tuesday Z2 session with 4 × 7 min Z3 (r. 3 min Z2) or 8 × 4 min Z3 (r. 2 min Z2), with the remaining days Z1 and Saturday rest (full text, Table 1).
Completed weekly training averaged 358 ± 63 min (Z2 55 ± 20 min, Z3 25 ± 3 min) in PYR and 348 ± 57 min (Z2 21 ± 8 min, Z3 48 ± 9 min) in POL, with no difference in training load (p = 0.992) (full text, Table 4).
PYR→POL gained relative VO2peak mostly in the second half (+0.3 ± 2.0% mid-pre, +2.7 ± 1.6% post-mid), whereas POL→PYR gained it in the first half (+2.9 ± 2.0% mid-pre, 0.0 ± 1.2% post-mid) (full text, Table 5).
Pre-to-post effect sizes were small: 5-km time −1.5 ± 0.7% (d = 0.28) in PYR→POL versus −0.6 ± 0.6% (d = 0.11) in PYR (full text, Table 5).
Four participants (one per group) were excluded for absence from post-testing and/or <90% adherence to the prescribed sessions (full text).
Correction: the entry gives the relative VO2peak group × time interaction as "p<0.0001" (as in the abstract), but the results section reports F(6, 112) = 4.5; p = 0.0004 (full text).