Lactate Testing
Find the exact point where your body starts to struggle — and turn it into precise training zones, sharper fitness tracking and smarter race-day pacing.
Reading your body’s tipping point
A lactate test is the gold-standard way to map your metabolism. You work through a series of progressive stages, and we take a small finger-prick blood sample at the end of each one to measure exactly how much lactate your body is producing and clearing.
Those measured numbers reveal your aerobic and anaerobic thresholds — the tipping points that separate easy from hard, and sustainable from unsustainable. From there we build a complete metabolic picture: your fat and carbohydrate use, your fuelling demands, and the precise training zones that make every session count.
The numbers behind your training
Each one is measured, explained in plain English, and turned into something you can act on.
How you produce and clear lactate across a range of paces — the measured foundation the whole profile is built on.
Aerobic threshold (LT1)The intensity where lactate first starts to rise — the ceiling for your easy, all-day endurance pace.
Anaerobic threshold (MLSS)The fastest pace you can hold before lactate runs away from you — the single most important number for racing.
VLamaxHow fast you produce anaerobic energy — low means an efficient endurance "diesel", high suits shorter, punchier efforts.
FatMaxThe intensity where you burn the most fat, sparing precious carbohydrate for when it matters.
CarbMaxThe pace above which carbohydrate demand climbs steeply — so you know exactly when fuelling becomes non-negotiable.
Glycogen storeHow much carbohydrate you can store and, at race-pace burn, roughly how long it lasts before you fade.
Personalised zonesPrecise pace and heart-rate zones from recovery to threshold — so easy runs stay easy and hard sessions truly count.
From test to zones in four steps
Around 45–60 minutes on the day. A detailed report and training plan shortly after.
A quick chat about your training, goals and event, then an easy warm-up to get you ready to work.
You build through progressive stages on the treadmill or bike. A tiny finger-prick sample is taken at the end of each stage.
Your measured lactate values are modelled into a full metabolic profile — thresholds, fat & carb use and training zones.
A clear, plain-English report lands shortly after, with colour-coded zones, race-day fuelling and how to train from it.
A look inside a lactate test
Lab-grade kit, a tiny sample and precise data — measured in the room, in real time.
A plan you can run, not just numbers
Your results come back as a clear, coach-written report — the science made skimmable, with colour-coded zones, charts and plain-English verdicts.
You’ll know exactly how easy your easy runs should be, the pace to hold at threshold, when to fuel and how hard, and how your fitness is trending every time you re-test.
Built for athletes who want to train with precision
If you’re putting in the miles, this makes sure every one of them counts.
5k to marathon — dial in threshold pace, fuelling and durability.
Pace long efforts and balance the disciplines without blowing up.
Find your true fat/carb crossover and fuel big days correctly.
Serious club athletes and age-groupers ready to stop guessing.
Lactate Testing
One test. A precise map of your thresholds, zones and fuelling — and a plan to train from real data.
Book nowGood to know
Not at all. The test is calibrated entirely to you — it’s just as valuable for a motivated club runner as for a national-level athlete. It simply meets you where you are and shows you how to improve.
Either. We run the test in the way that matches your sport, so the numbers transfer directly to how you actually train and race.
The finger-prick samples are quick and barely noticeable. The hard part is the effort itself — but you’re in control of the pace at every stage.
Come well-fuelled and well-rested, as you would for a quality session — avoid a hard workout the day before. We’ll send full guidance when you book.
Around 45–60 minutes on the day, with your full report following shortly after.
Ready to train from real data?
Book your lactate test and turn the guesswork of training into precise, personalised zones.
The 24 hours before your test
Turn up caffeinated, dehydrated or two days after a hard session and the test faithfully measures that instead of your fitness. Caffeine alone shifts blood lactate by about 0.7 mmol/L and lifts measured fat oxidation by roughly a quarter, which is more than the test’s own margin of error.
So we wrote down exactly what we ask of every athlete, why each rule is there, and how strong the evidence behind it actually is.
- Page one. The countdown, from 72 hours out to the morning itself.
- Page two. Why each rule exists, and how solid the research behind it really is.
- Page three. What we hold constant at our end, and what counts as a real change rather than noise.
Get your own numbers
One hour at either Liverpool clinic. You leave with your thresholds, the pace band where you burn the most fat, and training zones in pace or power you can use that week.
We re-test every 10 to 12 weeks, so you can see what your training actually changed rather than guessing at it.
Not sure which test you need? The 360° Metabolic Profile puts lactate, VO₂ and force plate testing into one morning and one report.
Frequently asked questions
How much does lactate threshold testing cost in Liverpool?
A lactate test costs £250, which includes the test and a full report. You can book at either of our Liverpool clinics, Seaforth or Speke. If you would like lactate, VO2 and force plate testing together, the 360 Metabolic Profile combines them into one morning and one report, from £500.
What will a lactate test tell me?
It measures how you produce and clear lactate across a range of paces. From that, the report sets out your aerobic threshold, your anaerobic threshold, how fast you produce anaerobic energy, the intensity where you burn the most fat, when carbohydrate demand climbs, and personalised pace and heart rate zones for training.
What do I receive after the test?
A clear, plain-English report follows shortly after your test, with colour-coded training zones, charts and race-day fuelling guidance. It explains how easy your easy sessions should be, the pace to hold at threshold, and when and how hard to fuel, so you can start using the zones in your training that week.
How often should I repeat a lactate test?
We re-test every 10 to 12 weeks. Repeating the test at regular intervals lets you see what your training has actually changed, such as shifts in your thresholds and zones, rather than guessing. Each re-test also keeps your training zones up to date as your fitness develops.
What is the difference between a lactate test and a VO2 max test?
A lactate test uses small finger-prick blood samples at each stage to find your thresholds, fuel use and training zones. VO2 max testing measures aerobic capacity and is listed separately at £150. If you are unsure which you need, the 360 Metabolic Profile combines lactate, VO2 and force plate testing in one session.