Potential Assessment of Dehydration during High-Intensity Training Using a Capacitance Sensor for Oral Mucosal Moisture: Evaluation of Elite Athletes in a Field-Based Survey

Gen Tanabe,Kairi Hayashi,Hiroaki Kobayashi,Yuka I Sumita,Hiroshi Churei,Katsuhiko Suzuki,Tetsuya Hasunuma,Nana S Kamiya,Yasuo Takeuchi,Toshiaki Ueno,Shintaro Shimizu,Naoki Moriya,Yuto Inai

doi:10.3390/chemosensors9080196

Abstract

Background: The aim of this clinical study was to reveal the relationship between body dehydration and oral mucosa moisture measured by the use of a capacitance sensor for oral epithelial moisture. Methods: The following clinical parameters were recorded from each one of 19 athletes in a one-week period of high-intensity exercise at the U-23 Triathlon Training Camp in summer and winter; body weight, urine specific gravity, oral mucosa moisture, subjective oral thirst, and subjective throat thirst (within 30 min after waking and before breakfast at 7:00 a.m. on Day2 and Day6). Results: There were no significant differences in the mean values of body weight, urine specific gravity, oral mucosa moisture, oral thirst, and throat thirst between Day2 and Day6 in both measurements in summer and winter. The oral mucosa moisture had a moderate negative correlation with urine specific gravity (p < 0.05, r = −0.45). Conclusions: This study suggests that oral mucosal moisture determined using an oral moisture-checking device could be a potential index for assessing dehydration during sports activities.

Highlights

Thegravity regression equation that value of oral mucosa moisture ture predicting specific of 1.020 g/mL,showed which is an the index of dehydration, was predicting urine specific gravity of 1.020 g/mL, which is an index of dehydration, was ≈27.5. Thefindings findingsof of this this study study suggest suggest that a caThe that oral oralmucosa mucosamoisture moisturemeasured measuredusing using a pacitance sensor for oral epithelial moisture is a simple index for dehydration assessment capacitance sensor for oral epithelial moisture is a simple index for dehydration assessment duringsports sportsactivities
These results suggest that higher,but butthe theoral oral wetness wetness was was higher results suggest that thethe oraloral mumucosa moisture measured using a capacitance sensor for epithelial oral epithelial moisture as a cosa moisture measured using a capacitance sensor for oral moisture as a simple simple for dehydration assessment itsmay ownnot maybenot be sufficient, and combining index index for dehydration assessment on its on own sufficient, and combining multimultiple assessment methods may be necessary
The results showed a gradual downward trend in oral mucosal moisture at all temperatures, with a smaller value recorded at 30 ◦ C throughout the 60 min [28]

Summary

Introduction

Dehydration impairs exercise performance and contributes to serious heat exhaustion [6] and exertional heat stroke [7], rhabdomyolysis [8], and The aim of this clinical study was to reveal the relationship between body dehydration and oral mucosa moisture measured by the use of a capacitance sensor for oral epithelial moisture. Methods: The following clinical parameters were recorded from each one of 19 athletes in a one-week period of high-intensity exercise at the U-23 Triathlon Training Camp in summer and winter; body weight, urine specific gravity, oral mucosa moisture, subjective oral thirst, and subjective throat thirst Conclusions: This study suggests that oral mucosal moisture determined using an oral moisture-checking device could be a potential index for assessing dehydration during sports activities.

Methods

Results

Discussion

Conclusion