
Heat training and sweat testing to help you perform at your best
We use our heat chamber to acclimate athletes so that they're ready to perform in the heat. Recent research has shown that heat training is also a strategy to improve performance in temperate conditions, making it applicable to all athletes looking for an edge. Beyond heat acclimation, we offer a range of performance tests and specialist training services including:
- Sweat Rate Testing to help you figure out how much you need to drink in training and racing
- Sweat Sodium Concentration Testing, which tells you how much sodium you lose in your sweat to help you dial in your hydration strategy
- Lactate Threshold Profiling to help you refine your training zones
Heat training is a powerful performance tool which is largely underused by the average athlete.
Victor Campenaerts – Tour de France Stage winner
See how the Lotto Cycling Team use heat training:
Our Services
Heat Training
Heat acclimation means training in a simulated hot environment - like the heat chamber here at the Precision Performance Lab - and has long been accepted as a proven way to improve performance both in the heat and in temperate conditions.

What it involves
- A sub-maximal session for ~60 minutes at ~40°C (104°F)
- + ~30 minutes of pre-post-exercise set-up and consultation
- 1, 5 or 10 sessions aimed to deliver the desired effects
What you learn
- Understand your sweat rate (in Litres per hour) in the heat, so you can dial in how much you drink during training and racing
- Understand how best to manage your performance when training and racing in hot conditions
- Understand the impact heat has on your core body temperature
- Learn the basic principles of heat training
The science behind heat training
This service is ideal for
- Athletes from mild climates preparing for races in hot climates
- Athletes looking for performance gains ahead of a key race
- Athletes looking to gauge their performance drop-off when racing in the heat
- Athletes looking for the gains delivered by altitude training, but who cannot access altitude
Heat Experience
1 session
Run or cycle for 60 minutes in extreme conditions to see how you handle the heat! Challenge for the "King or Queen of Sweat" on our Sweat Scoreboard.
£149
Heat Acclimation
5 sessions
Achieve performance-enhancing heat adaptations with five 60 minute sessions in the heat chamber. Typically conducted over ~7-10 days. Free PF&H electrolytes and 2 x PF 30 Gels or Chews.
£629 (Save >15%)
Heat Hero
10 sessions
Get optimal performance gains by jumping into the heat for ten 60 minute workouts. Usually done over ~14-20 days. Free PF&H electrolytes and 2 x PF 30 Gels or Chews.
£999 (Save 33%)
More questions?
Contact usSweat Testing
Sodium is the key electrolyte you lose in your sweat and it’s crucial to your hydration status. The thing is, everyone loses a different amount of sodium in their sweat, from as little as 200mg of sodium per litre, to as much as 2,000mg/L. This is largely genetically determined and our at-rest Sweat Test can tell you how much you lose so you can dial in your hydration strategy.

What it involves
- Sitting comfortably for ~30-45 minutes whilst our Sweat Test kit stimulates a small patch of your forearm to sweat maximally and we collect a sample
- No needles, no exercise
What you learn
- Understand your sweat sodium concentration (in milligrams per litre of sweat), so you can tailor the strength of your drinks
- A detailed report and consultation with a hydration specialist
- A fuel & hydration plan for your next race (and access to the planning software for future races)
The science behind sweat testing
This service is ideal for
- Athletes who struggle to perform in the heat, but can't work out why
- Athletes who struggle with cramp, particularly late on in races
- Athletes who feel bloated, thirsty or have a dry mouth, or pee frequently during training and racing
- Athletes looking for the performance gains that can be found by optimising your approach to hydration
Sweat Test
@ the Lab
Understand how salty your sweat is with our at-rest test and dial in your hydration strategy with our ‘sweat experts’.
£120
Sweat Test + Heat Experience
@ the Lab
Combine understanding your sweat sodium concentration with a 60 minute session in our heat chamber to get a handle on your sweat rate and further dial in your hydration plan.
£239 (Save ~10%)
More questions?
Contact usLactate Profiling
Personalise your approach to training by assessing your fitness and training zones.

What it involves
- A progressive (~30-45 minute) exercise test on the treadmill or bike
- A finger-prick blood lactate test
What you learn
- Understand your lactate thresholds to better inform your training zones
The science behind lactate profiling
This service is ideal for
- Athletes who want to optimise their training by dialing in their zones
Lactate Profiling
Understand your aerobic and anaerobic thresholds to define your optimal training zones and track longitudinal changes in your physiology.
£149
Lactate Profiling + Heat Experience
Combine defining your optimal training zones with a heat experience session where you can see how you handle the heat! Perhaps you can challenge for the "King or Queen of Sweat" on our Sweat Scoreboard.
£269 (Save ~10%)
More questions?
Contact usPlan your visit
Arriving by train?
Arriving by car?
Here’s the What 3 Words location: https://what3words.com/next.refreshed.handbook
Our HQ is a lovely converted Sawmill with a gravel driveway, literally just off the main road. When you arrive, if they’re free, you can park out front in the spaces to the left of the building. Or head through the gates on the right and park around the back. Please just keep the channel on the right free so delivery vehicles can access the warehouse at the back of the plot. Then head in via the central glass “patio” door at the back of the building and someone will greet you.

Frequently asked questions
Do heat acclimation sessions have to be on consecutive days?
What do I have to bring with me to the sessions?
Am I able to bring my own bike?
Am I able to leave my bike with you instead of taking it home?
Do I have to bring my own bike to each session?
Can I run or ride?
What is your cancellation policy?
Can I train that day while completing heat acclimation trials?
What happens if I buy a pack and then am unable to attend 1 or more sessions (due to any reason such as sickness, injury etc)?
Got questions?
Email our experienced Athlete Support team, or book in for a free video consultation to get them answered. No hard-sell, just friendly folks who'll help you understand how our lab could help you perform at your best.
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