training zones
7 posts tagged "training zones".
- 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 - 24 September 2026
Your Watch's "Lactate Threshold" Feature Isn't Measuring Your Lactate Threshold
Your Garmin gives you a lactate threshold heart rate. It never took a drop of your blood.
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 - 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 - 30 May 2026
How Your Lactate Zones Match Your Watch’s Zones
Your watch has five heart-rate zones; a lactate test reveals two thresholds and three effort bands. Here is how the two systems fit together.
Read post - 26 May 2026
Lactate Test Case Study: Garmin Zone 2 Was 17 bpm Too Low
A 45-minute lactate test in South Wales showed Tayla's Zone 2 capped at 157 bpm, not 140. Her Garmin was wrong by 17 bpm. Here's what we found and changed.
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.
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