Submaximal exercise quantified as percent of normoxic and hyperoxic maximum oxygen uptakes
| Deutscher übersetzter Titel: | Submaximale Belastung quantifiziert als Prozentsatz der normoxischen und hyperoxischen maximalen Sauerstoffaufnahmen |
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| Autor: | Byrnes, William C.; Mihevic, Patricia M.; Freedson, Patty S.; Horvath, Steven M. |
| Erschienen in: | Medicine and science in sports and exercise |
| Veröffentlicht: | 16 (1984), 6, S. 572-577, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Gedruckte Ressource |
| Sprache: | Englisch |
| ISSN: | 0195-9131, 1530-0315 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU198503023175 |
| Quelle: | BISp |
Abstract
Maximum oxygen uptake (VO2max) was measured in six college-aged males under normoxic (NVO2max) and hyperoxic (HVO2max; 70 oxygen) conditions. Subjects then randomly performed the following three 20-min submaximal exercise bouts: 75 normoxic VO2max under normoxia (NVO2N), 75 normoxic VO2max under hyperoxia (NVO2H), and 75 hyperoxic VO2max under hyperoxia (HVO2H). Metabolic parameters were obtained at 5-min intervals. Hyperoxia resulted in a 13 increase in VO2max (NVO2max = 3.54 l/min vs HVO2max = 4.00 l/min). Significant decreases were observed in VE (ventilation) (13), epinephrine (37), norepinephrine (26), and blood lactate (28), with no change in oxygen uptake (VO2), carbon dioxide production (VCO2), or respiratory exchange ratio (R) during hyperoxia at the same absolute power outputs (NVO2N vs HVO2H). However, at the same relative power outputs (NVO2N vs HVO2H) no significant changes in VE, epinephrine, norepinephrine, or blood lactate were observed when hyperoxia and normoxia were compared. Verf.-Referat