A Self-Powered Biosensor for Monitoring Maximal Lactate Steady State in Sport Training

Yupeng Mao,Tianming Zhao,Mailun Shen,Bing Liu,Wen Yue,Song Chen

doi:10.3390/bios10070075

Yupeng Mao, Tianming Zhao + Show 4 more

Open Access

https://doi.org/10.3390/bios10070075

Copy DOI

Abstract

A self-powered biosensor for monitoring the maximal lactate steady state (MLSS) during exercise has been developed for intelligently assisting training system. It has been presented to create poly (vinylidene fluoride) (PVDF)/Tetrapod-shaped ZnO (T-ZnO)/enzyme-modified nanocomposite film through an efficient and cost-effective fabrication process. This sensor can be readily attached to the skin surface of the tester. Due to the piezoelectric surface coupling effect, this biosensor can monitor/sense and analyze physical information in real-time under the non-invasive condition and work independently without any battery. By actively outputting piezoelectric signals, it can quickly and sensitively detect body movements (changes of joint angle, frequency relative humidity during exercise) and physiological information (changes of lactate concentration in sweat). A practical application has been demonstrated by an excellent professional speed skater (male). The purpose of this study is to increase the efficiency of MLSS evaluation, promote the development of piezoelectric surface coupling effect and motion monitoring application, develop an intelligently assisting training system, which has opened up a new direction for human motion monitoring.

Highlights

In recent years, many researchers have attempted to combine the human body with various sensors to capture the information of body movements and physiological indexes [1,2,3,4,5,6]
The fabric was washed several times with pure water and ethanol. It was treated in an ultrasonic bath for 10 min to remove surface impurities and dried in air at 60 ◦ C 2.5 g PVDF powder was dissolved in 50 mL acetone solution and stirred at 60 ◦ C for 1 h
When the voltage is 0.122, 0.074, 0.069, 0.05, 0.041, and 0.038 V, the response is 0%, 63.9%, 77.2%, 144.8%, 197.4%, and 220.8%, respectively. These results show that it is feasible to monitor the maximal lactate steady state (MLSS) in our biosensor

Summary

Introduction

Many researchers have attempted to combine the human body with various sensors to capture the information of body movements and physiological indexes [1,2,3,4,5,6]. These sensors can detect temperature, heart rate, and breath, which can provide convenience of health care monitoring and medical diagnosis [7,8,9,10,11,12].

Objectives

Methods

Results

Conclusion