Sweat Testing & Fuelling Tests in Leicester

Personalised Hydration Plan (Sweat Test)
Fuelling Test (FatMax)

Stop guessing on race day. At our lab near Leicester, we use two targeted tests to optimise your fuel and hydration intake: a sweat test to pinpoint your hydration and electrolyte needs, and a FatMax fuelling test to set your race-day carbohydrate target. Ideal for runners, trail and ultra runners, triathletes and cyclists.

Based in Syston, just north of Leicester, and easy to reach from Loughborough, Nottingham, Derby, Coventry, Northampton and Birmingham.

Personalised Hydration Plan (Sweat Test)

Athlete having a sweat test on their forearm at TrailMed's lab in Leicester

We all know that dehydration can affect our performance. But avoiding dehydration can be the tricky bit, it's rarely as simple as just drinking water.

The amount of sweat and sodium lost during exercise can vary up to 15 times, even between similar individuals. This is why a generic, "one-size-fits-all" approach to hydration doesn't work. Instead, our sweat test measures your own sodium losses and we work with you to create a Personalised Hydration Plan tailored to your specific needs.

  • 45 minutes
  • No exercise needed
  • £120

What's involved?

  • 45 minute consultation
  • Sit and relax while we induce sweating on your forearm and collect a sample
  • No exercise needed

What do you learn?

  • Your sweat sodium concentration (mg/L), to tailor your drinks and replace lost electrolytes
  • A discussion of your current fuelling and hydration strategy with a lab specialist
  • A tailored hydration plan for your next race

This test is perfect for

  • Runners, triathletes and cyclists optimising their hydration
  • Athletes who exercise or race in the heat
  • Athletes who struggle with cramp
  • Athletes who feel bloated, thirsty, or pee frequently while training or racing

Hydration Plan

Sweat test, consultation and a tailored plan for your next race.

£120
Book your sweat test

Fuel + Hydrate Bundle

Combine the Fuelling Test and Hydration Plan for a complete race-day strategy.

£230
Save 15%
Book the bundle

Have a question about the Sweat Test? Get in touch and our team will help.

Enquire today

Fuelling Test (FatMax)

Athlete on a treadmill wearing a metabolic testing mask during a FatMax fuelling test in Leicester

Fuelling correctly can be tricky, because the way your body metabolises fat and carbohydrate varies significantly between athletes, even those training for the same event.

This is why a generic, "one-size-fits-all" approach doesn't work. Instead, we test your physiology directly to find your FatMax point and carbohydrate crossover point, and build a Personalised Fuelling Plan around them.

  • Treadmill or bike
  • Full report included
  • £150

What's involved?

  • Rested, fasted arrival
  • A short warm-up
  • A graded exercise test, on treadmill or bike
  • Full report explaining your results and race-day strategy
  • Gut training plan

What do you learn?

  • Your FatMax point: the intensity where you burn fat fastest
  • Your carb crossover point: where carbs take over as fuel
  • Your hourly carbohydrate target for race day
  • How to train your gut for higher carb intake

This test is perfect for

  • Marathon, ultra and Ironman athletes optimising their race-day fuelling
  • Athletes with GI issues when exercising
  • Athletes who feel sick fuelling mid-exercise
  • Athletes who "hit the wall" or run out of energy

Fuelling Test

FatMax and crossover testing, full report and gut training plan.

£150
Book your fuelling test

Fuel + Hydrate Bundle

Combine the Fuelling Test and Hydration Plan for a complete race-day strategy.

£230
Save 15%
Book the bundle

Have a question about the Fuelling Test or the bundle? Get in touch and our team will help.

Enquire today

Sweat Testing & Fuelling Test FAQs

Common questions from runners, triathletes and cyclists booking a test at our Leicester lab. Looking for a wider fitness picture? See our Health & Performance tests, including VO2max testing.

What is a sweat test?

A sweat test measures how much sodium you lose in your sweat. You sit and relax while we induce sweating on your forearm and collect a sample. No exercise is needed and the appointment takes around 45 minutes. We use your result to build a personalised hydration plan for training and racing.

What is a FatMax test?

A FatMax test is a graded exercise test on a treadmill or bike that measures how your body uses fat and carbohydrate as the intensity rises. It finds your FatMax point, the intensity where you burn fat fastest, and your carbohydrate crossover point, where carbs take over as your main fuel. We use these to set your hourly carbohydrate target for race day.

Do I need to fast before a fuelling test?

Yes. Arrive rested and fasted so your results reflect how your body uses fuel without a recent meal affecting the data.

Should I choose the sweat test or the fuelling test?

Choose the sweat test if you race in the heat, struggle with cramp, or feel bloated or thirsty while training. Choose the fuelling test if you get stomach issues, feel sick when fuelling or hit the wall. If you want a complete race-day plan, the Fuel + Hydrate Bundle covers both for £230, saving 15%.

Who are these tests for?

Runners, trail and ultra runners, triathletes, cyclists and anyone training for an endurance event, from a first marathon or Ironman to multi-day ultras.

Where is TrailMed's sweat testing and fuelling lab?

Our lab is at Fosse House, Fosse Way, Syston, Leicester LE7 1NL, just north of Leicester city centre. It is easy to reach from across Leicestershire and the East and West Midlands, including Loughborough, Nottingham, Derby, Coventry, Northampton and Birmingham.

Stop Guessing!

Unlock Your Peak Performance with a Data-Driven Nutrition Strategy.

Two people having a consultation in an office with a 'Trailmed' banner, posters of cyclists, and a table with a laptop, a medical device, and a coffee mug.

Use the form below to inquire about our Personalised Fuelling Plan (metabolism analysis & carb targets) and/or our Personalised Hydration Plan (Sweat Test & electrolyte needs).

Tell us which challenges you are facing, and our team will help you find the right test to ensure you are fueling and hydrating with precision