The Two Metabolic Thresholds during Incremental Exercise

本文對47名健康青年通過腳踏車進行級增性運動試驗，通過電腦系統計算每分鐘通氣量（VE），耗氣量（VO2），二氧化碳產量（VCO2）以及VE/VO2和VE/VCO2，並以每20秒一次進行標記。在運動過程中可見到兩種不同的通氣閾值（AT）和代謝性酸中毒失償閾值（TDMA），此二閾值可以用兩種不同之方法進行測定。由VE/VO2曲綫所測得之AT與由VE或VCO2之第一折點所測得者極其近似，相關係數r為0.86。由VE/VCO2測得之TDMA與由VE或VCO2之第二折點所測得者亦極為相近，r=0.971。由上述兩法所測得之AT占TDMA之比例分別為68.10%和64.19%。我們認為Reinhard等所報告之AT與TDMA與Skinner等所建議之兩個閾值實際相同。

關鍵字

缺氧閾值；代謝性酸中毒失償閾值

並列摘要

Forty-seven normal young adults were studied by an incremental graded exercise test on a bicycle ergometer. Alterations in respiratory gas exchange were monitored by a computerized exercise system; minute ventilation (VE), oxygen consumption (VO2), CO2 production (VCO2), VE/VO2 and VE/VCO2 were plotted every 20 seconds. Two distinct ventilatory thresholds, the anaerobic threshold (AT) and threshold of decompensated metabolic acidosis (TDMA) were detected by two different methods. AT measured by VE/VO2 was similar to that measured by VE and/or VCO2 (correlation coefficient r=0.86). TDMA measured by VE/VCO2 was also very similar to that measured by VE and/or VCO2 (r=0.971). The ratio of AT to TDMA, as calculated by the above two methods, was 68.10% and 64.19% respectively. It was concluded that the AT and TDMA reported by Reinhard et al were similar to the two thresholds suggested by Skinner and McLellan.

並列關鍵字

Anaerobic threshold ； Threshold of decompensated metabolic acidosis

國際替代計量

The Two Metabolic Thresholds during Incremental Exercise

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