Excess lactate concept and oxygen debt of exercise
| Autor: | George G. Burton, Antonius L. Van Kessel, Karlman Wasserman |
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| Rok vydání: | 1965 |
| Předmět: | |
| Zdroj: | Journal of Applied Physiology. 20:1299-1306 |
| ISSN: | 1522-1601 8750-7587 |
| Popis: | The Huckabee concept that “excess lactate” (XL) is equivalent to the O2 debt of exercise and physiological phenomena derived therefrom, were investigated. Measurements of O2 debt, arterial blood lactate and XL, and O2 consumption were made during cycle ergometer exercise of controlled intensity and duration. Our results indicate: 1) The oxygen equivalents of XL as well as Delta lactate are less than the O2 debt, at all work loads. 2) The concentration of XL does not linearly increase during exercise. 3) The anaerobic metabolic rate whether calculated from XL or O2 debt is not a constant fraction of the metabolic rate, at all work loads. A larger fraction of energy is derived from the O2 debt creditors at heavy and very heavy than at moderate work loads. 4) In 30 controlled work-load exercise studies of prolonged duration, XL did not contribute any information not revealed by lactate itself. 5) The differences between Huckabee's results and those of our own are not due to differences in the measurement of XL but rather to differences in the directly measured O2 debt. anaerobic metabolism; O2 debt creditors; O2 consumption Submitted on January 4, 1965 |
| Databáze: | OpenAIRE |
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