Self-Powered Piezoelectric-Biosensing Textiles for the Physiological Monitoring and Time-Motion Analysis of Individual Sports.

Yupeng Mao,Bing Liu,Song Chen,Lili Xing,Mailun Shen,Xinyu Xue

doi:10.3390/s19153310

Abstract

Self-powered piezoelectric-biosensing textiles for the physiological monitoring and time-motion analysis of individual sports have been developed. The material system is composed of tetrapod-shaped ZnO nanowires on common textiles. The mechanism is based on the coupling of enzymatic reaction (LOx and lactate) and piezoelectric effect. After conformably attaching the device to the athlete, the device can monitor in real-time the moving speed, frequency, joint angle, and sweat lactate concentration of the athlete. The whole monitoring/analysis process is battery-free. The motor skills and physiological state of two athletes are investigated using the textiles, and different lactate threshold times and maximum lactate release capacities have been obtained. This technique can help them develop distinct training programs. This research is a new direction for the scientific monitoring of kinematics and may also stimulate the development of self-powered wearable sports-related systems.

Highlights

Individual physiological monitoring and time-motion analyses are important ways to improve performance in competitive sports [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]
A flexible polymer has been introduced into the device, forming a wearable sensing system like an artificial electronic skin. Based on these previous works [32,33,34,35], we propose that this technique can be used for the physiological monitoring and time-motion analysis of individual sports
The textiles were washed with pure water and ethanol several times, treated in an ultrasonic bath for 10 minutes to remove surface impurities, and dried in air at 60 ◦ C

Summary

Introduction

Individual physiological monitoring and time-motion analyses are important ways to improve performance in competitive sports [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]. Video camera devices are usually used to capture exercise movement; GPS devices are used to record the running speed and real-time position [20,21,22,23,24], and various medical measurement devices are used to test blood lactate, heart rate, and other physiological parameters. These collected data are analyzed to evaluate the sports performance of individual athletes [3,6,13,17]. The batteries or other power units embedded in the system restrain the long-term and real-time utility due to the inconvenient recharge and replacement

Methods

Results

Conclusion