Scientists develop skin patch with on-the-spot sweat monitor app

This photo provided by J. Rogers, Northwestern University, shows a soft, skin‐mounted microfluidic device for capture, collection and analysis of sweat. Time to break a sweat: Researchers are creating a skin patch that can test droplets of sweat to track health while people exercise, beaming results to their smartphones. (J. Rogers, Northwestern University via AP)

LONDON: Scientists in the United States have developed a flexible microfluidic device that easily sticks to the skin and measures sweat levels to show how the wearer's body is responding to exercise. 

The low-cost device, which can quickly analyse key elements such as lactate, Ph or glucose levels and let the user know if they should stop or change their activity, could also in future help diagnose and monitor disease, the researchers said.