健康男性青年运动负荷试验的研究

目的明确健康人运动时呼吸循环反应及运动前后血钾改变,寻找定量评价呼吸困难和求取无氧阈(AT)的方法.方法对43名健康青年男性进行了运动负荷试验,测定了气体代谢指标和动脉血钾,判定了勃氏分级指数(BS)和每分钟氧摄取量(VO2)的相关性,评价了5种气体代谢交换法求取的AT.结果死腔通气率静息时为0.28±0.05,最大运动时为0.19±0.05,两者比较P<0.01,运动前后动脉血钾分别3.76mmol/L±0.29mmol/L,4.10mmol/L±0.38mmol/L,两者比较P<0.01;BS与Vo2直线相关,得到BS斜率(BSS)等定量评价呼吸困难指标.不同方法求取的AT,ATvCo为1208ml/min±233ml/min,和与其比较具有一致性(P>0.05).结论健康青年男性运208ml/min233ml/min.ATVE和ATvzo与其比较具有一致性(P>0.05动中通气效率改善;运动后动脉血钾增高;运动中呼吸困难能够定量评价;应用每分钟二氧化碳呼出量(Vco2)、每分钟通气量(VE)、氧通气当量(VEO2)锐利增加形成拐点求取AT是合适的.

Study on the exercise test in young health men

OBJECTIVE: To define the reaction of the respiration and circulation; and to find methods to quantitatively evaluation dyspnea and evaluate the methods that determine anaerobic threshold(AT) with the healthy man during exercise. METHODS: Exercise test was used for 43 healthy young man to measure the index of gas metabolism and artery potassium. The relation between the index of Borg scale (BS) and the oxygen uptake per minute (VO2) was observed. The methods of how to obtain anaerobic threshold(AT) were evaluated by the five kinds of gas metabolism. RESULTS: (1) VD/VT were significantly decreased from the rest to the maximal load exercise (0.28 +/- 0.55 vs 0.19 +/- 0.55, P < 0.01). (2) Seran potassium is state of after exercise (3.76 mmol/Lvs +/- 0.29 mmol/Lvs 4.10 mmol/L +/- 0.38 mmol/L, P < 0.01). (3) BS were closely correlated with VO2 during exercise, From the linear regression line 3 variables Borg scale slop(BSS), Threshold load of dyspnea(TLD), and breakpoint load of dyspnea (BLD), could be derived for quantitative evaluation of dyspnea. (4) ATVCO2 were1208 ml/min +/- 233 ml/min, and it were consistent with ATVE and ATVEO2 (P > 0.05). CONCLUSION: The artery potassium is increased after exercise in young health men. The methods of quantrta-tive evaluation of dyspnea can be used during exercise. It is suitable for AT to obtained by the sharp turning point of the carbon dioxide production (VCO2), minute ventilation (VE) and Ventilation equivalent oxygen (VEO2).