CAJ | 학술논문

背景:6 min步行试验是一种亚极量水平的运动试验,其操作简便、费用低廉,因而应用较广泛,然而将步行距离转换为最大运动能力是不易的.目的:课题组创新性地在6 min步行实验中引入做功的概念,将无线遥测呼吸气体分析仪同时应用于6 min步行试验和心肺运动试验,分析6 min步行试验中的距离、做功与峰值摄氧量与Bruce方案测得的最大摄氧量之间的相关性.设计、时间及地点:实验于2009-03/05在南京东南大学附属中大医院康复医学科完成.对象:健康受试者来自在中大医院康复医学科实习的学生,共25名,男14名,女11名;年龄(22.0±2.3)岁.方法:25名志愿者先按Bruce方案进行极量心肺运动试验,检测每位受试者极量运动时的最大摄氧量和无氧阈,再接受6 min步行试验,测量每位受试者的6 min步行距离、做功和峰值摄氧量.心肺运动试验和6 min步行试验均采用便携式K4b~2气体分析仪实时检测气体交换参数,以获得最大摄氧量和峰值摄氧量.主要观察指标:①摄氧量、心率、呼吸频率随时间的变化规律.②步行距离、做功、摄氧量、心率、呼吸频率的前后比较.③心肺运动试验中的最大摄氧量、无氧阈与6 min步行试验中的峰值摄氧量比较.④距离、做功与峰值摄氧量、最大摄氧量之间的相关性.结果:心肺运动试验测得的无氧阈与6 min步行试验测得的峰值摄氧量之间差异无显著性意义(P > 0.05).6 min步行距离与峰值摄氧量和最大摄氧量均无明显相关;6 min步行做功与峰值摄氧量呈线性相关(r=0.779 7,P < 0.001);6 min步行做功与最大摄氧量亦呈线性相关(r=0.894 1,P < 0.001).结论:6 min步行试验是一种无氧阈水平的运动试验.6 min步行做功既可反映受试者亚极量运动的能力,也能反映受试者极量运动的能力.
배경:6 min보행시험시일충아겁량수평적운동시험,기조작간편、비용저렴,인이응용교엄범,연이장보행거리전환위최대운동능력시불역적.목적:과제조창신성지재6 min보행실험중인입주공적개념,장무선요측호흡기체분석의동시응용우6 min보행시험화심폐운동시험,분석6 min보행시험중적거리、주공여봉치섭양량여Bruce방안측득적최대섭양량지간적상관성.설계、시간급지점:실험우2009-03/05재남경동남대학부속중대의원강복의학과완성.대상:건강수시자래자재중대의원강복의학과실습적학생,공25명,남14명,녀11명;년령(22.0±2.3)세.방법:25명지원자선안Bruce방안진행겁량심폐운동시험,검측매위수시자겁량운동시적최대섭양량화무양역,재접수6 min보행시험,측량매위수시자적6 min보행거리、주공화봉치섭양량.심폐운동시험화6 min보행시험균채용편휴식K4b~2기체분석의실시검측기체교환삼수,이획득최대섭양량화봉치섭양량.주요관찰지표:①섭양량、심솔、호흡빈솔수시간적변화규률.②보행거리、주공、섭양량、심솔、호흡빈솔적전후비교.③심폐운동시험중적최대섭양량、무양역여6 min보행시험중적봉치섭양량비교.④거리、주공여봉치섭양량、최대섭양량지간적상관성.결과:심폐운동시험측득적무양역여6 min보행시험측득적봉치섭양량지간차이무현저성의의(P > 0.05).6 min보행거리여봉치섭양량화최대섭양량균무명현상관;6 min보행주공여봉치섭양량정선성상관(r=0.779 7,P < 0.001);6 min보행주공여최대섭양량역정선성상관(r=0.894 1,P < 0.001).결론:6 min보행시험시일충무양역수평적운동시험.6 min보행주공기가반영수시자아겁량운동적능력,야능반영수시자겁량운동적능력.
BACKGROUND: 6-minute walking test (6MWT) is a submaximal test, characterizing by easily processing and low cost, thus it is widely used in the clinic. However, how to change walking distance into maximal motor capacity needs to be further studied.OBJECTIVE: To study the correlation of 6-minute walking distance (D), work (W), peak oxygen uptake (VO_2 peak) and maximal oxygen uptake (VO_2 max) detected by Bruce.DESIGN, TIME AND SETTING: This study was performed at tshe Department of Rehabilitation Medicine, Zhongda Hospital affiliated to Southeast University from March to May 2009.PARTICIPANTS: A total of 25 healthy volunteers were enrolled, including 14 males and 11 females, with a mean age of (22.0±2.3) years.METHODS: All 25 subjects were tested with cardiopulmonary exercise testing (CPET) according to Bruce, VO_2 max and anaerobic threshold (AT) was detected respectively, then 6MWT" was adopted to detect 6-minute walking distance (D), work (W) and maximal oxygen uptake (VO_2 max) of subjects. Data of pulmonary gas exchange in breathing was detected by wireless remote sensor K4b~2 to obtain VO_2 max and VO_2 peak.MAIN OUTCOME MEASURES: ① Regularity of cardiac rate, oxygen uptake and respiratory frequency varied with time passing; ② Walking distance, work, oxygen uptake, cardiac rate and respiratory frequency were compared before and after testing; ③ Maximal oxygen uptake and anaerobic threshold with CPET were compared to peal oxygen uptake with 6MWT; ④ Correlation of distance, work between maximal oxygen uptake and peal oxygen uptake.RESULTS: There was no significant difference between AT from CPET and VO2 peak from 6MWT (P > 0.05). 6-minute walking distance was not correlated with either VO_2 peak or VO_2 max. However, 6-minute walking work was linearly correlated with both VO2 peak (r=0.779 7, P < 0.001) and VO_2 max (r=0.894 1, P < 0.001).CONCLUSION: 6-minute walking test is an exercise test at level of anaerobic threshold. 6-minute walking work can reflect both submaximal exercise capacity and maximal exercise capacity.