Know exactly
what's holding
back your race.
PaceLab analyses your blood markers against athlete-specific ranges — not generic GP averages. Precise blockers identified. Targeted 6-week protocols to fix them.
Your GP says normal. Your legs disagree.
Standard blood ranges are built for the general population — not athletes training 50km+ a week. The gap between "clinically normal" and "performance optimal" is where your lost minutes live.
From blood test to race plan in 5 minutes.
Your Race Readiness Score
Good progress — address blockers below
8 markers. One complete picture.
Most GPs order 3-4 markers. PaceLab tracks 8 — the ones that actually determine endurance performance.
Real data. Real improvements.
Everyday endurance athletes who tested smarter.
""I was training 12 hours a week and exhausted constantly. My GP said everything was fine. PaceLab found my ferritin at 14. Eight weeks later it was 54 — and my sessions feel like a different sport.""
""Three stress fractures in 18 months. Everyone blamed my biomechanics. PaceLab flagged Vitamin D at 24 nmol/L. No fractures in 14 months since.""
""Marathon PB stuck at 3:42 for two years. PaceLab found low testosterone. 12 weeks of protocol and I ran 3:31.""
Start free. Go deeper with Pro.
Your Race Readiness Score is always free. Pro unlocks full protocols, daily logging, and personalised coaching.