The purpose of this study was determined level of anaerobic threshold(AT) of in Korean Rhythmic Sportive Gymnasts. Bruce protocol was used to determine V˙O₂max. Physical characteristics of subjects(n=10) were in Korean Rhythmic Sportive Gymumsts aged 18±1.49(yr), of body mass 51.87±6.55(㎏), and of height 164.60±4.86(㎝). AT was estimated by using V-slope method. VO₂and VOC₂were plotted on the X and Y coordinates, and the slope of two lines were calculated. AT was determined at the point of intersection of the two slopes. The results of this study were followed: The level of AT was determined at 55.10±8.24 which was about 96.5% of VO₂max