Hemoglobin, hematocrit, and calculated plasma volume induced by a short, supramaximal task
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| Deutscher übersetzter Titel: | Haemoglobin, Haematokrit, und daraus berechnete Plasmavolumenaenderungen nach einem kurzdauernden supramaximalen Belastungstest |
|---|---|
| Autor: | Rotstein, A.; Bar-Or, O.; Dlin, R. |
| Erschienen in: | International journal of sports medicine |
| Veröffentlicht: | 3 (1982), 4, S. 230-233, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
| Sprache: | Englisch |
| ISSN: | 0172-4622, 1439-3964 |
| DOI: | 10.1055/s-2008-1026093 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU198302017896 |
| Quelle: | BISp |
Abstract
The influence of a short, supramaximal task of 30 s duration on plasma volume (PV) was tested in 14 female physical education students. Hemoglobin (Hb), hematocrit (Hct), and osmolality (Osm) were tested pre- and post-exercise. Performance of the exercise test, consisting of 30 s all-out pedaling against a load of 4.4 J/kg body weight per pedal revolution, brought about a significant elevation in the measured variables. The changes in Hct, Hb, and Osm were 3.14 , 0.92 g/dl, and 9.58 mOs/kg, respectively. The changes in PV, calculated from the increase in Hct alone and from changes in Hct and Hb, was found to be - 10.4 and - 11.2 , respectively. It is suggested that very short periods of maximal exercise can bring about some 10 - 15 drop in PV. Mechanisms for this decrease are not clear. It could result from changes in tissue osmolality, filtration pressure, or opening up of collapsed capillaries. Verf.-Referat