유산소 운동시 산소농도가 산화스트레스에 미치는 영향

Abstract

본 연구는 건강 향상 및 체중감소를 위한 운동 중 참여율이 가장 높은 유산소 운동 수행을 통해 운동 환경이 인체에 미치는 영향을 알아보기 위해 임의적으로 산소농도를 실외운동환경인 대기농도 21%산소농도와 실내환경농도인 19%산소농도로 조성하여 변화양상을 규명하여, 궁극적으로는 환경의 중요성을 제시하고자 하였다. 이를 위해 인천 소재 I대학교 체육학과에 재학 중인 신체 건강한 남학생 11명을 대상으로 선정하여, 이들을 19% 산소농도에서의 환경과 21% 산소농도의 환경에서 최대산소량의 60%로 30분 운동수행을 실시하도록 하였으며, 혈액변인은 운동전, 운동직후, 회복후 30분간 측정을 하였고, 호흡 변인은 운동전 운동직후 측정을 하였다. 측정된 결과를 토대로 통계검정을 하여 나온 결과는 다음과 같다. 1. MDA, SOD, Cortisol, FFA, Lactate는 19%산소농도와 21%산소농 도 모두 집단내 시기별로 유의한 차이가 나타났다(p<.05). 2. Lactate 농도는 19% 산소농도와 21% 산소농도 집단간 운동 직후 유의한 차이가 나타났다(p<.05). 3. VO₂, VCO₂, VO₂ kg/min/㎖, RER, VE, HR, PaO₂, PaCO₂, Total Kcal는 19%산소농도와 21%산소농도 모두 집단내 시기별로 유의한 차이가 나타났다(p<.05). 4. VO₂, VCO₂, VO₂ kg/min/㎖, RER, VE, HR, PaO₂, PaCO₂, Total Kcal는 19%산소농도와 21% 산소농도 집단간 운동 직후 유의한 차이가 나타났다(p<.05). 종합해 보면 실외환경인 21%의 산소농도에 비해 실내 환경인 19% 산소농도에서의 운동수행은 스트레스를 더 증가시키고, 피로를 더 빨리 유발시키는 것으로 나타났다. 반면 21% 산소농도에서는 산소섭취효율이 효율적이었으며, 스트레스가 저하되고 피로물질이 적게 쌓이며, 지방연소와 에너지소비 측면에서도 효과적으로 나타났다. 따라서 환기가 잘 되지 않는 실내환경에서의 운동 수행은 피로를 더 빨리 증가시키고 에너지 소비 효율성에서도 효과적이지 못할 것으로 보여 지기 때문에 실내환경에서 운동을 수행 하더라도 대기 산소농도를 유지시켜 주어야 무리가 따르지 않을 것으로 사료된다.; The purpose of this study was to examine the effects of exercise environment on body through aerobic exercise which many people had participated for health promoting and weight loss. For the purpose, oxygen concentration was voluntarily controled to 21% which was exercise environment in outdoor and to 19% which was exercise environment in indoor, and the process of physical change was observed, in the end the importance of exercise environment would be presented. 11 subjects were selected who were in good health and undergraduate students at department of physical education in I university. All subjects performed the exercise in voluntarily controled environment both in 19% and 21% oxygen concentration with VO2 max 60% for 30 minutes. Blood variables were measured in three times: pre-exercise, post-exercise, and recovery, respiratory variables were measured in pre-exercise and post-exercise. The main results of this study were as follow: First, there were significantly different in MDA, SOD, cortisol, FFA, lactate according to measurement periods in all group(p<.05). Second, there was significantly different in lactate at post-exercise between groups(p<.05). Third, there were significantly different in VO₂, VCO₂, VO₂ kg/min/㎖, RER, VE, HR, PaO₂, PaCO₂, total Kcal according to measurement periods in all group(p<.05). Forth, there was significantly different in VO₂, VCO₂, VO₂ kg/min/ ㎖, RER, VE, HR, PaO₂, PaCO₂, total Kcal at post-exercise between groups(p<.05). In conclusion, the performing exercise in 19% oxygen concentration which was exercise environment in indoor would increase physical stress and cause fatigue more quickly than in 21% oxygen concentration. However, the performing exercise in 21% oxygen concentration which was exercise environment in outdoor would be more efficient in oxygen intake, decrease physical stress and fatigue factor, be effective in fat oxidation and energy expenditure. Because the performing exercise in indoor environment which was poor ventilation would increase fatigue factor more rapidly and would not be effective in energy expenditure, it would be important a continuous change of air to maintain the oxygen concentration though exercise must be performed in indoor environment.