Shvartz E, Gaume J G, Reibold R C, Glassford E J, White R T
Aviat Space Environ Med. 1982 Aug;53(8):795-802.
Eight young men were twice administered--on two different days--a series of hemodynamic (using an impedance plethysmograph), subjective, and skin temperature measurements during 5 h of quite sitting. On one day, a Circutone seat (massage-type seat cushion) was activated for 14 min/h, and on the other day it was not. During the "Circutone off" day, 5 h of sitting resulted in a continuous decrease in calf blood flow and an increase in venous blood pooling in the calf; an increase in blood pressure and a stable cardiac output (4.6 l/min); very low urine output; large increases in skin temperatures at the body areas in contact with the seat (thigh and lower back); and increases in various subjective responses of discomfort. The Curcutone activation resulted in a substantial exchange of the stagnant blood in the calf and thigh; a tendency to increase thigh and calf blood flow; a decrease in venous pooling in the thigh; and less subjective discomfort. The Circutone activation had no effect on skin temperature. The results indicate that the Circutone seat improved seat comfort by improving local circulation, especially in the thigh, which probably accounted for the improved subjective reactions.
八名年轻男性在两天内，于安静坐姿状态下接受了为期5小时的一系列血流动力学测量（使用阻抗体积描记法）、主观感受评估及皮肤温度测量。其中一天，Circutone座椅（按摩型座垫）每小时启动14分钟，另一天则未启动。在“Circutone关闭”日，5小时的坐姿导致小腿血流量持续减少，小腿静脉血液淤积增加；血压升高，心输出量稳定（4.6升/分钟）；尿量极少；与座椅接触的身体部位（大腿和下背部）皮肤温度大幅升高；各种不适的主观反应增加。Circutone启动后，小腿和大腿的淤积血液大量交换；大腿和小腿血流量有增加趋势；大腿静脉淤积减少；主观不适减轻。Circutone启动对皮肤温度没有影响。结果表明，Circutone座椅通过改善局部循环，尤其是大腿部位的循环，提高了座椅舒适度，这可能是主观反应改善的原因。
