대학수영선수와 체육전공학생을 대상으로 100M free-style 수영 전·후에 따른 동맥혈액의 산소포화도 변화 비교

The purpose of the current study was to compare exercise-induced arterial hypoxemia following a 100M free-style swimming. College swimmers(n=7) and counterpart major students in physical education(n=7) voluntarily participated in this study. All subjects performed a 100M free- style swimming at maximum effort. Hemoglobin saturation(SaO2%) and heart rate were measured prior to and immediately following the swimming exercise by using a finger pulse oximeter. Capillary blood samples collected at a finger were used to measure blood lactate concentrations at 3 minutes and 10 minutes following the swimming exercise. Independent t-test and two-way ANOVA with repeated measures were used to compare mean differences in the measured variables between the two groups. The results showed that decreased arterial oxygen saturation following the swimming exercise was significantly higher in the college swimmers than in the counterpart major students in physical education. Limited to the swimmers, the degree of the hypoxemia was inversely related to the 100M swimming performance, while no significant association was found in the major students in physical education. in addition, the degree of the hypoxemia was inversely related to VO2max such that those with lower VO2max values suffered more from hypoxemia than those with higher VO2max values. On the other hand, there were no significant group differences in post-exercise heart rate and blood lactate concentrations between the two groups. In conclusion, the current data suggest that exercise -induced hypoxemia is common in highly trained college swimmers, which can impair their swimming performance.