Recreational marathon pace sits below LT
For recreational marathoners (slower than approximately sub-3-hour finish), marathon race pace typically falls below the lactate threshold, distinguishing their physiological demand profile from elite marathoners whose race pace sits at or above LT.
In plain English
For most everyday marathoners, race pace sits 5 to 15 percent easier than their threshold, the pace where effort turns hard. The slower the goal, the bigger that gap.
Why it works
LT velocity is fitness-dependent and scales roughly with race ability. Faster runners have higher absolute LT velocities, while marathon pace at slower goal times falls progressively further below the individual's LT.
What it means in practice
Marathon-pace tempos for recreational marathoners do not inherit threshold-specificity benefits. For these audiences, prefer threshold-pace tempos at the runner's actual LT (faster than goal MP), reserve race-pace work for pacing rehearsal in a smaller dose, and emphasize easy aerobic volume + long-run progression.
The evidence
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Lactate threshold and lactate turnpoint occurred at 18.9 ± 0.4 and 20.2 ± 0.6 km/h respectively, while marathon race pace (21.1 km/h) was at or above the lactate turnpoint. For elite marathoners, marathon pace is NOT below LT — it is at or above. For recreational marathoners running well below 21 km/h, marathon pace falls below LT, meaning race-pace training does not inherit threshold-specificity benefits.
n=16
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Improvements in lactate threshold (LT) were largely specific to the trained mode, while improvements in VO2peak transferred between modes. Run training raised VO2 at LT on both treadmill (+58.5%) and cycle ergometer (+30.3%), but the treadmill gain was significantly larger. Cycle training raised cycle-ergometer VO2 at LT by 38.7% but produced no significant change on the treadmill (23.6 to 24.0 ml/kg/min). VO2peak improved 11.9% to 20.7% in both training groups regardless of testing mode. Controls showed no change. The specificity finding for LT but transfer for VO2peak suggests that LT adaptations are predominantly peripheral (muscle-specific) while VO2peak gains reflect central (cardiovascular) adaptations that transfer across modes.
n=16
Why we call confidence high
Jones 2021 directly measured elite-pace physiology and showed marathon pace at 21.1 km/h sits at or above LT2 (20.2 km/h). Pierce 1990 establishes mode- and intensity-specific adaptation. Smyth 2020 critical-speed analysis in recreational marathoners confirms typical marathon pace falls below CS for this population. The conclusion follows mechanistically: as marathon pace gets slower, it drops further below the runner's individual LT.
Where it applies
Recreational marathoners with goal pace slower than approximately 6:50/mile (4:15/km). Generalizes to sub-marathon-pace events for similar audiences.
Does not apply to: elite or near-elite marathoners (sub-2:30 male, sub-2:50 female) where race pace can sit at or above LT.
Last reviewed 2026-05-08. See how we score.