遠赤外線照射と運動による人の汗の研究 : ナトリウム, カリウムイオン及び乳酸の濃度

抄録

The concentrations of sodium ion (Na⁺), potassium ion (K⁺), and lactic acid (LA) in human sweat induced by far-infrared radiation (FIR) and physical exercise (PE) were directly measured by high performance liquid chromatography. These samples were collected from two parts of human bodies (arm and breast) with a certain lapse of time in summer and winter seasons. The Na⁺ was ca. 45% higher in FIR than in PE, two times higher in winter than in summer, and increased with an increase of the amount of perspiration. Whereas, the K⁺ decreased as amount of perspiration increased, and the highest K⁺ was observed at the beginning of perspiration. The LA was especially affected by season. In winter, the LA of FIR became higher than that of PE. In summer, however, the LA of PE became distinctly higher than that of FIR.