CAJ | 학술논문

应用近红外光谱技术（NIRS）测定肌肉递增强度工作时肌氧含量变化与最大摄氧量和无氧阈指标之间的关系;分析肌氧拐点与无氧阈拐点产生的机制及在测定最大有氧能力中的作用。方法：受试者17名按运动水平分为A、B两组在功率自行车上以逐级递增负荷蹬车,测定右股外侧肌肌氧含量并同步测量VE、VCO2、VO2、HR,并在每级负荷末测定血乳酸。结果：研究发现递增负荷运动时肌氧含量呈台阶状下降,负荷较低时,肌氧在负荷开始阶段迅速下降之后保持平衡或升高,负荷较高时肌氧持续下降,肌氧的变化与血容量相吻合。肌氧含量与摄氧量、心率及血乳酸等值高度相关（P〈0.01）。肌氧下降时出现拐点与乳酸阈、通气阈拐点基本一致。结论：研究表明NIRS测定动态肌肉收缩时肌氧含量变化对运动强度具有较高敏感性;肌氧拐点与通气无氧阈、心率无氧阈、乳酸阈在时间和强度上相一致,表明肌氧含量的测定可以用于人体最大有氧能力的评定。
응용근홍외광보기술（NIRS）측정기육체증강도공작시기양함량변화여최대섭양량화무양역지표지간적관계;분석기양괴점여무양역괴점산생적궤제급재측정최대유양능력중적작용。방법：수시자17명안운동수평분위A、B량조재공솔자행차상이축급체증부하등차,측정우고외측기기양함량병동보측량VE、VCO2、VO2、HR,병재매급부하말측정혈유산。결과：연구발현체증부하운동시기양함량정태계상하강,부하교저시,기양재부하개시계단신속하강지후보지평형혹승고,부하교고시기양지속하강,기양적변화여혈용량상문합。기양함량여섭양량、심솔급혈유산등치고도상관（P〈0.01）。기양하강시출현괴점여유산역、통기역괴점기본일치。결론：연구표명NIRS측정동태기육수축시기양함량변화대운동강도구유교고민감성;기양괴점여통기무양역、심솔무양역、유산역재시간화강도상상일치,표명기양함량적측정가이용우인체최대유양능력적평정。
The purpose of this study was to observe the changes in skeletal muscle ogygenation at different incremental exercise on bicycle ergometer and to analyze the production mechanism of oxygenation and anaerobic threshold turing points and its effects in evaluating maximal aerobic capacity（MAC）.17 participants were divided into two groups（Group A and Group B） according to their athletic career.Incremental exercise was performed on cycle egometer and respired gas was continuously sampled by IMA for breath-by-breath determination of VE,VCO2 and VO2.Blood sample was taken from fingertip for analyzing blood lactate concentration.Moreover,muscle oxygenation from quadricepts muscle was measured simultaneously.The result indicated that at the beginning of exercise,muscle oxygenation immediately declined with greade increase and kept balance gradually when the same grade exercise continued.As the workload was upgraded,the muscle oxygenation sharply declined correspondent to the intensity of the exercise.The change of muscle oxygenation during incremental exercise was correlated with Bla and VO2.It could be concluded that NIRS was a fairly sensitive method for measuring muscle oxygenation during exercise.The turning point of muscle oxygenation which was correspondent with the breaking points of Bla,VT and HR might indicate that NIRS could be effectively utilized for determining MAC.