Development of a microfluidic collection system to measure electrolyte variations in sweat during exercise

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Exercise Physiology

Background:

• Electrochemical sweat sensors are emerging for real-time biomarker monitoring.
• Limited understanding exists on physiological changes in sweat biomarkers over time.
• Real-time sweat analysis is crucial for personalized health insights.

Purpose of the Study:

• To develop and validate a microfluidic system for collecting and analyzing sweat.
• To investigate inter- and intra-individual variations of electrolytes during exercise.
• To establish reliable methods for tracking sweat biomarker dynamics.

Main Methods:

• Development of a novel microfluidic sweat collection patch with reservoirs.
• Collection of sweat samples during exercise using the developed system.
• Analysis of sodium (Na+), chloride (Cl-), and potassium (K+) concentrations using ion chromatography.

Main Results:

• The new microfluidic system enables reliable sweat collection.
• Demonstrated ability to measure inter- and intra-individual variations in electrolyte concentrations.
• Confirmed reliable measurement of ion concentration changes over time.

Conclusions:

• The developed microfluidic sweat collection system is effective for physiological monitoring.
• This method allows for reliable tracking of electrolyte dynamics in sweat.
• Provides a foundation for understanding sweat biomarker variations during physical activity.