‘Wristwatch’ monitors body chemistry to boost athletic performance, prevent injury

wearable wrist device

NC State researchers have developed a device the size of a wristwatch that can monitor an individual’s body chemistry to help improve athletic performance and identify potential health problems. The device can be used for everything from detecting dehydration to tracking athletic recovery, with applications ranging from military training to competitive sports.

“This technology allows us to test for a wide range of metabolites in almost real time,” says Dr. Michael Daniele, co-corresponding author of a paper on the work and an assistant professor of electrical and computer engineering and in the Joint Department of Biomedical Engineering (BME) at NC State and UNC-Chapel Hill.

Metabolites are markers that can be monitored to assess an individual’s metabolism. So, if someone’s metabolite levels are outside of normal parameters, it could let trainers or health professionals know that something’s wrong. For athletes, it could also be used to help tailor training efforts to improve physical performance.

“For this proof-of-concept study, we tested sweat from human participants and monitored for glucose, lactate, pH and temperature,” Daniele says.

A replaceable strip on the back of the device is embedded with chemical sensors. That strip rests against a user’s skin, where it comes into contact with the user’s sweat. Data from the sensors in the strip are interpreted by hardware inside the device, which then records the results and relays them to a user’s smartphone or smartwatch.

“The device is the size of an average watch, but contains analytical equipment equivalent to four of the bulky electrochemistry devices currently used to measure metabolite levels in the lab,” Daniele says. “We’ve made something that is truly portable, so that it can be used in the field.”

While the work for this paper focused on measuring glucose, lactate and pH, the sensor strips could be customized to monitor for other substances that can be markers for health and athletic performance — such as electrolytes.

“We’re optimistic that this hardware could enable new technologies to reduce casualties during military or athletic training, by spotting health problems before they become critical,” Daniele says. “It could also improve training by allowing users to track their performance over time. For example, what combination of diet and other variables improves a user’s ability to perform?”

First author of the paper is Murat Yokus, a Ph.D. student at NC State. Co-corresponding author of the paper is Dr. Alper Bozkurt, a professor of electrical and computer engineering. The paper was co-authored by Tanner Songkakul, a Ph.D. student at NC State, and Vladimir Pozdin, a post-doctoral researcher in BME


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