Beta-endorphin, catecholamines, and cortisol during exhaustive endurance exercise
Deutscher übersetzter Titel: | Beta-Endorphin, Katecholamine und Kortisol waehrend erschoepfender Ausdauerbelastung |
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Autor: | Schwarz, L.; Kindermann, W. |
Erschienen in: | International journal of sports medicine |
Veröffentlicht: | 10 (1989), 5, S. 324-328, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 0172-4622, 1439-3964 |
DOI: | 10.1055/s-2007-1024922 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199001041394 |
Quelle: | BISp |
Abstract
To assess changes of beta-endorphin during intense endurance exercise, ten nonspecifically trained volunteers (aged 25.7 +/- 2.9 years) were subjected to an exhaustive endurance test on a cycle ergometer at the work load of the individual anaerobic threshold (IAT) determined in a preparatory graded exercise test. Prior to, in 25-min intervals during, and repeatedly subsequent to exercise venous blood samples were drawn to measure the levels of beta-endorphin (beta-E), cortisol (C), adrenaline (A), and noradrenaline (NA). In addition, lactate, heart rate, and rate of perceived exertion were determined. The levels of beta-E remained unchanged during the first 50 min; between the 50th and 75th min beta-E increased by 82 (p < 0.01). At the end of the exercise (mean exercise time: 89 min), a beta-E level three times the resting level was measured. The maximum exercise-induced increase of beta-E showed a positive correlation to endurance capacity (W/kg of IAT): r = 0.74; p < 0.05. C exhibited similar changes to beta-E, but the onset of increase was delayed if compared with beta-E; there was a close correlation between these two stress hormones (75th min of exercise: r = 0.91; p < 0.001). The catecholamines A and NA increased linearly during exercise, without a correlation with the behavior of beta-E being established. Verf.-Referat