endurance
9 posts tagged "endurance".
- 9 October 2026
When Should You Retest Your Lactate Threshold?
A retest always shows where your fitness is. Its real value is after a training block, when it tells you whether the block worked.
Read post - 30 August 2026
Your FTP Is an Estimate. Your Heart Rate Zones Are an Estimate of an Estimate.
FTP is guessed from a short test. Then your heart rate zones are guessed from that guess. Here's why the errors compound, and how lactate testing measures your zones directly.
Read post - 20 August 2026
Lactate, VO2 Max, or Combined: Which Test Should You Book?
Three tests, one decision. Here's an honest guide to whether you need a lactate threshold test, a VO2 max test, or the combined profile, based on what you actually train for.
Read post - 29 July 2026
FTP and the Female Cyclist: What the Standard Training Numbers Get Wrong (Both Ways)
FTP and percentage-based zones were built largely on male physiology. Recent data shows they overestimate women's sustainable power at threshold and undersell their durability over distance.
Read post - 15 July 2026
Why Your VO2 Max Isn't Improving (The Oxygen Cascade Explained)
VO2 max is limited by oxygen delivery, not by your muscles. Follow the oxygen from the air to the mitochondria and you find the one step training actually changes, and why it is not the step most athletes train.
Read post - 29 June 2026
Lactate vs Ventilatory Thresholds: Our Findings and Why We Measure Blood, Not Breath
Ventilatory thresholds estimate your training zones from your breathing. Blood lactate measures them directly. We regularly see the two disagree by enough to ruin a pace target, which is why we measure blood for thresholds.
Read post - 23 June 2026
How Quickly Can You Improve Your Lactate Threshold?
One athlete moved her anaerobic threshold from 12.7 to 14.3 km/h in 8 weeks with one session a week. Here's what a lactate curve shift actually looks like, what drove it, and what you can realistically expect from your own retest.
Read post - 20 May 2026
Your Zone 2 Heart Rate Is Probably Wrong. Here's How to Tell.
Most athletes find their zone 2 from the talk test, the 220-age formula, or their watch. All three are wrong for a meaningful share of runners, and you can't tell from the inside which kind of wrong yours is.
Read post - 8 May 2026
Do You Actually Need a Lactate Threshold Test? An Honest Answer
Most athletes who book a lactate threshold test benefit from it, some don't. Here is who walks away with the most useful data, and who should wait.
Read post