Professional sweat sodium and sweat rate testing â lab-analyzed by Levelen. Get a personalized hydration and fueling strategy built on your actual physiology, not generic recommendations.
Your sodium losses are as unique as your fingerprint. One-size-fits-all hydration plans fail because they ignore the data that matters.
Sweat sodium concentration ranges from 200 to 2,000+ mg/L person to person. Two athletes training side by side can have 10x different sodium losses. You cannot guess this number.
As little as 2% body mass loss from dehydration measurably reduces power output, cognitive function, and endurance capacity. Knowing your sweat rate lets you prevent it precisely.
Under-replacing sodium leads to muscle cramping and fatigue. Over-drinking without sodium replacement risks hyponatremia â a potentially dangerous drop in blood sodium. Both are preventable with data.
Two data points that transform your hydration strategy from guesswork into precision.
Measured in mg/L â the amount of sodium your body loses per liter of sweat. This determines what you need to replace. It varies dramatically between individuals but is relatively stable for you personally, making it one of the most actionable data points in endurance performance.
Measured in L/hr â how much total fluid your body produces during exercise. This determines how much you need to drink. It changes with intensity, temperature, and humidity, which is why testing under different conditions gives you a more complete hydration profile.
From booking to personalized plan â a straightforward process with lab-grade accuracy.
Schedule your sweat test online. We will send preparation instructions before your visit â including guidelines on hydration and exercise leading into the session.
You will complete a controlled exercise session at our facility â bike or treadmill, your choice. We manage intensity and duration to produce a quality sweat sample.
Sweat samples are collected in-house during your session using validated collection methods. No finger pricks, no blood draws â just sweat patches applied to the skin.
Your samples are sent to Levelen for professional laboratory analysis. Results are returned within 1-2 weeks â this is real lab science, not an on-the-spot estimate.
Once your results are back, we schedule a 1-on-1 consultation. We walk through your sodium concentration, sweat rate, and build a personalized hydration and fueling strategy for training and race day.
Lab-analyzed sweat testing with personalized consultation included.
One sweat test session
Lab analysis by Levelen
1-on-1 results consultation
Personalized hydration plan
Two sweat test sessions
Test different disciplines (bike vs. run)
OR different conditions (heat, intensity)
Full consultation for both results
Save $90 vs. two singles
Bundle discounts do not apply to sweat testing. Both options include lab analysis and consultation.
If you train hard, race long, or suffer in the heat â this test gives you answers.
Dial in fluid and sodium for efforts lasting hours
Test both bike and run to build a multi-discipline plan
Training in heat amplifies sweat losses â know your numbers before summer
Chronic cramping during events often points to sodium deficit â test and find out
When nutrition falls apart late in a race, hydration strategy is often the root cause
You already track power, HR, and VO2 â add the hydration variable to your stack
Stop relying on general guidelines. Get your sweat sodium and sweat rate measured, then build a plan that is yours â backed by lab science, not trial and error.