Gender Differences of Heart Rate due to Change of Supply Rate of Highly Concentrated Oxygen

ABSTRACT The purpose of this study was to examine differences between male and female in heart rate due to 93% oxygen administration of the three levels (1L/min, 3L/min, and 5L/min). Ten healthy male (25.0±1.8years) and ten female (23.7±1.9years) college students were selected as the subjects for this study. The experiment consisted of three runs, i.e., the three levels of 93% oxygen administration, respectively. The each run consisted of three phases, i.e., Rest 1 (5min), Hyperoxia (10min), and Rest 2 (5min). Heart rate was measured throughout the three phases. Heart rate was decreased during hyperoxia compared to Rest 1 and 2. By increasing the supply rate of highly concentrated oxygen, △1 (decreasing rate of heart rate during hyperoxia compared to Rest 1) was increased. And △2 (decreasing rate of heart rate during hyperoxia compared to Rest 2) of male was lower than fe male, regardless of supply rate. Keyword: Heart rate, Highly concentrated oxygen, Supply rate, Gender 1. 서 론 인간은 인지 처리를 수행하게 되면 뇌 신경 조직에 글루코스와 산소를 공급하기 위한 다양한 생리 변화가 발생하게 된다[Jonides et al., 1997]. 즉, 인지 처리의 수행은 심박동율, 호흡, 산소 소모의 증가와 같은 생리 변화를 유발한다[Backs and Selihos, 1994]. 외부에서의 산소 공급이 인지 능력에 긍정적인 역할을 한다는 사실이 보고되었다[Moss et a l., 1998; Winder and Borrill, 1998; Scholey et al., 1999; Sung et al., 2002; Chung et al., 2004; Chung et al., 2006, 2007, 2008a, 2008b, 2008c]. 자동차 운전 중 산소 농도가 저하되면 현저한 피로를 느끼게 되나 고농도 산소를 공급하는 경우 피