REF-638 · Guellich, Seiler & Emrich, 2009 · International Journal of Sports Physiology and Performance, · Paper · PubMed
Young world-class rowers did 95% of rowing below 2 mmol/L lactate across a 37-week season
A strongly low-intensity-dominated distribution that polarised further in the competition period
Participants
n=36 young German male rowers (31 international, 5 national junior finalists; 19.2 ± 1.4 y; 10.9 ± 1.6 sessions per week) kept a diary of exercise and intensity categories over 37 weeks; later senior success (3 years on) was compared retrospectively.
Protocol
Descriptive training-diary study (from the abstract): rowers reported the volumes of defined exercise and intensity categories over 37 wk; rowing intensity categorised by heart-rate control against blood-lactate bands (<2, 2 to 4, >4 mmol/L).
Training categories analysed over the whole season and by defined training periods.
Retrospective comparison of juniors who attained national vs international senior success 3 y later.
Key Findings
Total training time: 52% rowing, 23% resistance exercise, 17% alternative training, 8% warm-up programmes.
By heart-rate control, 95% of rowing was at intensities corresponding to <2 mmol/L blood lactate, 2% at 2–4 mmol/L and 3% at >4 mmol/L; the low-intensity share stayed at approximately 95% throughout the season.
Competition period: a shift within the <2 mmol work toward lower intensity, and within the remaining ~5% toward more training near VO2max intensity — a progressive polarisation.
Rowers who reached international senior success 3 years later differed from their peers only in slightly higher volumes at both margins of the intensity scope (the easiest and the hardest work).
Practical Application
In 36 junior world-class rowers, 95% of rowing time was below 2 mmol/L lactate all season, with only about 5% at moderate-to-high intensity, and the small hard fraction moved toward VO2max work in the competition period. Anchor a rower's endurance base in a large block of genuinely low-intensity volume; keep hard days few and distinct, and sharpen them toward VO2max intensity as racing approaches.
The later-successful athletes did slightly more at both ends — a little more easy volume and a little more very hard work — not more middle-intensity rowing. Use this pyramidal, easy-dominated base as the default; polarised emphasis is the competition-period shape here (REF-088 for the direct polarized-vs-pyramidal comparison in senior rowers).
Limitations
Descriptive cohort data (association, not intervention); juniors may differ from senior or masters rowers; intensity anchored to heart rate corresponding to lactate categories, so the low-intensity share depends on that anchor; the success comparison is retrospective.
How this entry was checked and changed
Why this level
regraded 2026-09-27 from B+: descriptive cohort of n=36 (rubric B: small cohort; B+ needs ≥200 or a cross-sectional study ≥100)
Content correction 2026-09-27
"~95% below the first lactate turnpoint (LT1)" -> the abstract anchors on heart rate corresponding to <2 mmol/L lactate; "~5% at high intensity" -> 2% at 2–4 mmol/L plus 3% at >4 mmol/L.
"High-intensity work concentrated in targeted sessions rather than smeared" removed (not in the abstract); added the abstract's training composition, the competition-period polarisation and the later-success comparison.
Added n=36 and cohort details; Level B+ -> B per the 2026-09-26 rubric (small descriptive cohort).
2026-09-28: added Protocol from the abstract (Europe PMC PMID 20029096).