Winter consistency prevents detraining DGR. Cardiovascular fitness declines measurably within 7–10 days of reduced volume; stroke volume drops, plasma volume contracts, and economy erodes. An inconsistent winter creates a “catch-up” debt that spring training cannot fully repay before the first key race. By contrast, a disciplined athlete who trains 5–6 days per week—even at reduced intensity—preserves neuromuscular patterns, maintains tendon stiffness, and keeps the mental engine calibrated. This continuity translates directly into race-specific speed once intensity is layered on in March.