What is a Sweat Composition Test?
The Precision Hydration Sweat Test is a non-invasive assessment that measures the sodium
concentration in your sweat to personalize your hydration strategy.
Why Take this Test?
It helps athletes optimize electrolyte intake, prevent dehydration, and improve enduranceperformance.
Who Should Take a Sweat Composition Test?
Endurance athletes, including triathletes, runners, and cyclists, as well as those training or competing in hot conditions or prone to frequent cramping.
Test Protocol
Preparation
• No special preparation is needed (no fasting or exercise required).
• Arrive in a rested state, ideally well-hydrated.
• Avoid applying lotions or creams to the test site (forearm).
Testing Phase
• A sweat inducer stimulates sweat production on a small patch on your forearm
• Sweat is collected in a non-invasive device—no exercise required.
• The test takes around 20–30 minutes.
Results & Insights
• The sodium concentration in sweat (mg/L) is analysed to determine individual hydration needs.
• Results are used to recommend a personalized electrolyte strategy tailored to sweat rate, training conditions, and performance goals.
FAQ
Why is sodium concentration in sweat important?
Sweat sodium concentration is crucial for hydration, electrolyte balance, and performance. Losing too much sodium can lead to dehydration, muscle cramps, and even hyponatremia if fluids aren’t properly replaced. Since sodium losses vary widely between individuals, personalized hydration strategies based on sweat testing can optimize endurance and recovery.
How is this test different from a sweat rate test?
A sweat rate test measures how much you sweat, while this test determines how salty your sweat is. Both are useful for a complete hydration strategy.
Do I need to exercise for the test?
No. Unlike traditional sweat tests, this test does not require physical activity. It uses a mild
electric current to stimulate sweat production.
Can my sweat sodium concentration change over time?
No, your sweat sodium concentration is genetically influenced and remains fairly consistent.
However, your sweat rate can change with fitness level, environment, and acclimatization.
What is hyponatremia and hypernatremia?
Hyponatremia occurs when blood sodium levels drop too low, often from excessive water intake, leading to symptoms like nausea, confusion, and muscle weakness. The opposite, hypernatremia, results from dehydration or high sodium intake, causing thirst, confusion, and muscle twitching—both can be dangerous if untreated.