Sweat Smarter. Race Faster. — Campfire Endurance
Campfire Endurance coach
Mobile Sweat Testing · Campfire Endurance

You trained
for this.
Don't lose it
to salt.

You can estimate how much you sweat per hour. But do you know how much sodium is in that sweat? One number you're probably guessing. The other is written in your DNA — and it can make or break your race.

Book Your Sweat Test How It Works
The Problem
01

Easy to measure.
Easy to guess wrong.

Sweat rate — how much fluid you lose per hour — is simple to test. But the sodium concentration of that sweat? That's invisible, individual, and wildly variable from one athlete to the next.

02

The range is enormous.

Sodium loss can vary up to 15x between athletes who look identical on paper — same size, same sport, same effort level. A cookie-cutter hydration plan is essentially a coin flip for high-sodium sweaters.

03

Underperforming?
Salt might be why.

Months of training. A perfect taper. And then a race where your legs cramp, your head fogs, and your power drops — not because your fitness failed you, but because you didn't consume enough sodium. That's a solvable problem.

The Solution

Precision Hydration
Sweat Testing

A Precision Hydration Sweat Test gives you an accurate, science-backed reading of your sodium concentration — the key electrolyte lost in sweat. It's non-invasive, takes about 45 minutes, and requires nothing more than sitting comfortably while the test runs.

Because this is largely genetically determined and stable throughout your adult life, most athletes only need to take it once. You walk away with a personalised hydration strategy — what to drink, how much, and when — built specifically around your physiology.

No blood draws. No treadmill sprints. No lab wait times. Just data that changes how you race.

Learn about the Precision Hydration Sweat Test →
Precision Hydration sweat test
Precision Tested
Campfire Endurance Mobile Testing Van
Our Solution

We Come
To You.

Campfire Endurance operates a Mobile Testing Van — the MTV — bringing the full Precision Hydration sweat test experience directly to athletes. Race venue. Training campus. Your local club ride meetup. If you've got athletes, we've got a van.

No lab appointment. No driving across town. No figuring out where to go. Just show up, sweat a little, and leave knowing exactly what your body needs to perform at its best.

This is one of the simplest, highest-ROI things you can do for your race performance — and it's never been more accessible.

Book the MTV →
Common Questions

Everything you want to know about sweat testing.

What does the sweat test actually measure? +
The test measures the concentration of sodium in your sweat — the key electrolyte lost during exercise. It uses a small electrical current (iontophoresis) to stimulate a patch of skin, collecting the resulting sweat for analysis. No needles, no blood, no discomfort.
How long does it take? +
About 45 minutes from start to finish. The test itself is roughly 25–30 minutes of sitting still. The remaining time is a conversation with a Campfire coach about your training context, racing goals, and personalised hydration strategy.
Will I need to do anything to prepare? +
No special preparation needed. You don't need to exercise beforehand, fast, or avoid anything specific. Just arrive as you normally would. Avoid applying lotions or sunscreen to the test site (typically the forearm) on the day of your appointment.
How often do I need to be re-tested? +
Your sodium concentration is largely determined by genetics and remains stable throughout adulthood. In most cases, one test is enough for life. The exception would be if you undergo a major change in fitness or physiology — significant weight change, medication, or a major illness.
How variable is sodium loss between athletes? +
Dramatically variable. Sodium concentration in sweat ranges from around 200mg per litre to as much as 2,000mg/l — a 10x difference — between seemingly similar athletes. This is why one-size-fits-all electrolyte products routinely under-serve or over-serve athletes.
What will I actually do with the results? +
Your Campfire coach will walk you through a personalised hydration plan: which electrolyte strength to use in training vs. racing, how much to consume per hour based on conditions, and how to adjust for heat, duration, and intensity. You'll leave with something you can act on immediately — not just a number.
Is this only useful for long-distance athletes? +
Not at all. While the data is especially impactful for long-course triathlon and ultra-endurance events, it's relevant for any athlete training or competing for more than 60–90 minutes — or anyone who regularly experiences cramping, energy dips, or post-workout fogginess.
Where does the testing take place? +
In Campfire Endurance's Mobile Testing Van — the MTV. We bring the full testing setup to your location: race expos, training camps, club events, or private group bookings. Contact us to arrange a location that works for you and your training group.
Athlete racing at Kona

Don't let sodium
steal your finish line.

You've done the work. The long rides, the early mornings, the suffering. Don't leave your result to chance over something this simple to solve. One 45-minute test. One conversation. One personalised plan that travels with you to every start line, forever.

Book Your Sweat Test →
Sweat testing powered by Precision Fuel & Hydration • Brought to you by the MTV