Biomarker Analysis: Osmotic Balance & Fluid Decay
Diagnostic Inputs
Academic Overview: Hydration & The Aging Athlete
The Hypohydration Risk in Masters
As we age, total body water decreases and the **thirst mechanism** becomes less sensitive. Research indicates that by the time an athlete over 50 feels "thirsty," they have often reached a 2% body mass deficit—the point where cognitive function and power output degrade rapidly.
Precision Sodium Replacement
Sweat is more than water. For masters endurance athletes, replacing water without electrolytes can lead to **Hyponatremia**. A standard athletic baseline for replacement is ~750mg–1000mg of Sodium per liter of fluid lost.
Diagnostic Disclaimer: This tool is for educational self-tracking only. Hydration requirements vary significantly based on humidity, temperature, and personal metabolic rate.