Lactate threshold training
Train at the intensity just below where lactate spikes to push your sustainable pace higher.
Why it works
Lactate threshold (LT) is the exercise intensity where lactate accumulation begins to exceed clearance. Training at or just below LT improves the muscle’s ability to buffer and clear lactate, raises the sustainable power or pace, and shifts the aerobic-anaerobic crossover point upward. A higher LT means you can sustain a higher fraction of VO2 max in everyday aerobic work and race-pace efforts.
How to do it
- Find tempo pace: roughly 85–90% of max HR, or the pace you could hold for 45–60 minutes but not much longer.
- Do 20–40 minute tempo runs or rides at this pace, or 2–3 by 10-minute tempo intervals with short recovery.
- Program 1 session per week; this is more stressful than zone 2 and needs recovery.
- Track the pace or power at your target HR over weeks — improvement means your LT is rising.
Evidence
Lactate threshold training is one of the most consistently supported strategies for improving endurance performance. It is a cornerstone of evidence-based endurance coaching. (observational)
Threshold identification without lab testing relies on proxies (HR, perceived effort) that carry measurement error.
Sources
- Faude et al. (2009), lactate threshold concepts, Sports Medicine
Common mistake
Running tempo sessions too hard, pushing into zone 4 or 5, which accumulates so much fatigue that the higher zone 2 and VO2 max work suffers.
Practice this with IX Coach
7 days free, then $40/month (~$1.30/day).
More practices for VO2 Max and Longevity: The Peter Attia Framework
- Build a zone 2 aerobic base
Log 3–4 hours per week of low-intensity aerobic exercise to develop mitochondrial density and fat-oxidation capacity.
- VO2 max intervals
Use 4–8 minute high-intensity intervals at near-maximum effort to directly stress and expand your oxygen ceiling.
- Consistent aerobic exercise as a longevity practice
Show up for aerobic exercise consistently across years — the cumulative cardiorespiratory fitness gain is what predicts mortality reduction.
- Train grip and muscular strength alongside cardio
Combine aerobic training with resistance training — grip strength and muscle mass are independent longevity predictors.
- Track resting heart rate as a fitness marker
Monitor morning resting heart rate over weeks as a simple, free proxy for cardiorespiratory fitness changes.
- Protect VO2 max from detraining
Maintain a minimum effective dose of cardio during busy or injured periods — VO2 max is hard to build and surprisingly fast to lose.
Related concepts
- VO2max Training
The most powerful fitness metric for longevity — and how to systematically raise it
- VO2 Max and Longevity: Training Your Aerobic Ceiling
The aerobic fitness metric that predicts how long — and how well — you live
- Zone 2 Training
Mitochondria, metabolic flexibility, and the aerobic base that underlies everything else
- Blue Zone Principles: The Power 9 Longevity Practices
What the world’s longest-lived communities share — and the honest limits of what that tells us