In this study, it was observed how the supply of highly concentrated oxygen(40%) could affect HR while performing the addition tasks in a vehicle graphic simulator. The subjects of this study were 17 males in their twenties, and the addition tasks were performed in oxygen concentration(21%, 40%). For the performance of double-digit addition tasks in the straight course of two-lane road, its data was extracted by 30sec section from the start of the task and was analyzed. The test was proceeded in the order of Control (5min), Driving (2min), Driving + Task (1min), and Rest (10min). As a result of analyzing HR, there was a significant difference (p<0.01) between 21% oxygen concentration and 40% oxygen concentration, and HR increased during 21% oxygen concentration. Also, the significant difference between stimuli(Control, Driving, Driving+Task) was recognized, and as a result of the posteriori test, compared with Control, HR increased in Driving+Task, showing a significant difference(p<0.01). That is, the sympathetic nerve of the drivers were activated while performing the addition tasks during driving performance. Especially, when highly concentrated oxygen(40%) was presented, HR reduced. And thus, it was found out that highly concentrated oxygen(40%) had a positive effect on performing addition tasks while driving.

In this study, it was observed how 40% highly concentrated oxygen and lavender, peppermint affect the stress and fatigue which happen during driving performance and heart rate(HR). 12 male university students were selected as the subjects of this study. As a driving task, they were made to drive on the two-lane road for 5 minutes. While driving, addition tasks were added to increase the stress and fatigue. The driving performance like the above was implemented 6 times in total in the conditions of oxygen concentration (21%, 40%) and odors(normal, lavender, peppermint). For analysis, the findings were extracted by 30sec in three sections (Control, Driving, Driving + Task) and were compared. When the findings from three sections (Control, Driving, Driving + Task) were compared to identify driving fatigue , Driving +Task increased, showing a significant difference((p<0.01), compared with Control, That is, the subjects were made tired by addition tasks while driving. When highly concentrated oxygen (40%) and lavender, peppermint were presented to them, all of them showed the reduction of HR. That is, it can be said that highly concentrated oxygen and lavender, peppermint reduced the Fatigue of the drivers. When highly concentrated oxygen and lavender, peppermint were given simultaneously, there was no synergy effect.