洗口液中のアルコール濃度が短期ストレス負荷後の自律神経応答に及ぼす影響

抄録

This study aimed to investigate the effect of alcohol in mouthwash on peripheral and cardiac autonomic nervous system activity. In a within-subject experimental design, 20 healthy male adults used three types of mouthwash each having a different concentration of alcohol, Alc.0%, Alc.3%, and Alc.9%, and no rinse as a control after performing a 20-minute calculation task. Along with subjective evaluation, skin conductance and electrocardiogram were recorded throughout the experiment. Although there was no difference in subjective stress levels, a significant decrease was observed in skin conductance level (SCL) in the recovery period at Alc.0% and Alc.3% respectively as compared to the control group. As for the Alc.9%, subsequent decrease in the recovery period of SCL was smaller as compared to Alc.0% and Alc.3%. The findings suggest that the use of non or low-alcohol mouthwashes promotes recovery from peripheral stress response and non or low-alcohol mouthwashes might be better suited for use in situations requiring relaxation.