03/27/2026
Your lactate threshold defines how long you can hold your pace before your body starts working against you.
It's the intensity where lactate accumulates faster than your body can clear it. Below it, you're efficient. Above it, you're borrowing time - glycogen burns fast, muscles fatigue, and performance suffers.
This is why two runners with the same VO2max can finish 20 minutes apart in a marathon. The one with the higher threshold holds pace longer before breaking down.
It's one of the most important biomarkers in endurance — and most athletes have never actually measured theirs.
Not estimated. Not guessed from heart rate. Measured.
Cori is the world's first needle-free wearable lactate tracker. Continuous. Real-time. No painful blood draws.
Unlock early access → wearcori.com (link in bio)