Sweat sodium loss varies widely from one athlete to the next, anywhere from around 200 to over 2,000 milligrams of sodium per liter of sweat. Guessing at your hydration and electrolyte needs means guessing at your race day. In partnership with Precision Fuel & Hydration, Victorem runs a one-time, non-invasive, non-exercise sweat sodium test that replaces the guess with your actual number.
Sweat Testing
The Sweat Sodium Test
A one-time, non-invasive test built with Precision Fuel & Hydration, for athletes who train or race in the heat.
Book a Sweat Test
What You Get
The Precision Fuel & Hydration sweat sodium test is a one-time, non-invasive test, non-exercise test: you don't have to run, ride, or work out to get your number. It measures your sweat sodium concentration directly, so your hydration plan is built on your body's actual loss instead of a standard replacement guideline.
From your results, you get:
When, what, and how much to drink before, during, and after training or racing
Your recommended electrolyte replacement, based on your own sweat sodium concentration
Where and How Testing Happens
Testing is in person, currently offered in Brenham, San Antonio, Austin, Bryan-College Station, and Houston.
Victorem tests individual athletes, small groups, and full teams, so whether you're training solo for an Ironman or fueling an entire roster, the format fits.
If you train or race in hot, humid conditions for longer than 60 minutes, consider this test a must-do.
One Number, One Bigger Question
Your sweat sodium is one number. It's also the first data point in a bigger question: why does your body behave this way under load?
Plenty of athletes fix their hydration and still deal with GI distress, fatigue, or cramping that fueling alone doesn't resolve. That's usually a sign the sweat test only found the first layer. At Victorem, this test is step one of the FUEL Method, the same system that looks at your labs, your hormones, and your training load to find out what's actually going on underneath the numbers.
Teams, Clubs, and Group Events
Victorem runs on-site sweat testing for triathlon and run clubs, teams, and race events, not just individual athletes. If you coach or organize a group that trains or races in the heat, group testing gives everyone their own numbers in a single visit.
Get Started
Book a Sweat Test
Book online in minutes — a $25 deposit holds your spot, with the balance due at your test.
Testing in Brenham
In or near Brenham? Pick your own time slot — individual sweat tests are available year-round at our home location.
Book a time in BrenhamChecking upcoming testing days...
Somewhere else, or testing a group or team? Tell us where you're based and what you're training for — we'll follow up to get you scheduled.