Comparison of Palmar Sweating With Heart Rate and Percutaneous Arterial Blood Oxygen Saturation After Active Standing in Healthy Adults

The aim of this study was to compare changes in the amount of palmar sweating, measured using a portable hygrometric sweating meter, with changes in heart rate (HR) and percutaneous arterial blood oxygen saturation (Spo 2 ) measured using a pulse oximeter, after active standing. Participants were 20 healthy adults (mean age 20.9±0.8 years). Compared with a resting HR of 67.9±5.4 beats/min, HR was highest at 91.7±15.8 beats/min after 10s of active standing and then decreased to 86.4±13.3 beats/min at 20s. However, HR remained high at approximately 80beats/ min between 20 and 180s of active standing. The difference in HR between 10 and 180s of active standing was significant. Spo 2 was significantly decreased (98.1±1.0%) after 10s of active standing compared with the resting value (99.1±1.3%) and remained lower than the resting value for 180s, but the difference for periods longer than 10s was not significant. The amount of palmar sweating significantly increased (0.26±0.06 mg/min/cm 2 ) after 10s of active standing compared with the resting value (0.0±0.0 mg/min/cm 2 ) but then decreased for 180s after that, and the difference for periods longer than 10s was not significant. We observed that HR continued to increase for the first 180s of active standing, but the amount of palmar sweating was significantly increased only for the first 10s of active standing. In a future study, we plan to investigate whether the measured amount of palmar sweating can be used as an easy and noninvasive indicator in acute myocardial infarction patients undergoing heart rehabilitation.