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  • 1
    Digitale Medien
    Digitale Medien
    The effect of O2 breathing on maximal aerobic power (1972)
    Springer
    Pflügers Archiv 336 (1972), S. 225-235 
    Details
    ISSN: 1432-2013
    Schlagwort(e): Oxygen Breathing, Effect on Exercise ; Muscular Power, Maximal Aerobic ; Lactic Acid, Significance in Muscular Exercise
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Time of performance, blood lactic acid concentration (L.A.), heart rate (H.R.) and maximal oxygen consumption ( $$\dot V_{O_2 }^{\max } $$ ) were measured during air and oxygen breathin in 11 subjects performing a supramaximal exercise with an O2 requirement of 70 to 80 ml/kg·min to exhaustion. In addition the subjects were tested for maximal aerobic power with an indirect method. In one subject the rate of lactic acid increase in blood was also measured. The $$\dot V_{O_2 }^{\max } $$ measured with both the direct and the indirect method appears to be about 8% higher when breathing pure oxygen; lactic acid production rate decreases correspondingly. Maximal H.R. and maximal L.A. concentration were found to be the same. In submaximal exercise steady state H.R. is lower by about 8–9 beats/min when breathing oxygen. Also when breathing oxygen H.R. is a linear function of the work load. From experimental data obtained in subjects of different $$\dot V_{O_2 }^{\max } $$ , breathing both air or O2, the energy equivalent of L.A. could be calculated as amounting to about 47 ml of O2 or 235 cal per g of L.A. produced.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00590047
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Mechanical efficiency of phosphagen (ATP+CP) splitting and its speed of resynthesis (1969)
    Springer
    Pflügers Archiv 308 (1969), S. 197-202 
    Details
    ISSN: 1432-2013
    Schlagwort(e): Muscle Mechanical Efficiency ; O2 Debt Payment ; Phosphagen Concentration in Muscle ; Creatine Phosphate Speed and Efficiency of Resynthesis ; Muskel-Wirkungsgrad ; O2-Schuld-Ausgleich ; Phosphagen-Konzentration im Muskel ; Kreatinphospatresynthese-Geschwindigkeit und-Wirkungsgrad
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary From the amount of work at steady state, and the concentration of split phosphagen, equivalent to the oxygen debt, measured on an exercising isolated dog gastrocnemius, the velocity constant of phosphagen (ATP+CP) resynthesis, assuming that this reaction is an exponential one, could be calculated and found to be 1.98 min−1, the same value as found in man in exercise. The mechanical equivalent of phosphagen splitting in man has been calculated as 4.3 kcal/mol.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00586553
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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