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  • 1
    Electronic Resource
    Electronic Resource
    Relationship between O2 consumption, high energy phosphates and the kinetics of the O2 debt in exercise (1968)
    Springer
    Pflügers Archiv 304 (1968), S. 11-19 
    Details
    ISSN: 1432-2013
    Keywords: Oxygen Debt (Alactic) ; Phosphagen Resynthesis ; Sauerstoffschuld (“Alactacide”) ; Phosphagen-Resynthese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The oxygen consumption together with lactic acid production and concentration of ATP, ADP, and creatinephosphate was measured during exercise and recovery on an isolated dog gastrocnemius. Oxygen debt contraction and payment follow an exponential path with a half reaction time of about 20 sec. The concentration of ATP and ADP at steady state seem to be unaffected by the intensity of the exercise when this is submaximal and no appreciable production of lactic acid takes place. The concentration of creatinephosphate in muscle at steady state decreases with the intensity of the exercise. The ratio of the oxygen consumption at steady state to the alactic oxygen debt is identified with the speed constant of the resynthesis of phosphagen in muscle; the half reaction time of this process is 17–20 sec. The total alactic oxygen debt amounts to about 50 ml/kg of muscle. These figures are in good agreement with earlier data found in man.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586714
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Lactic acid production in supramaximal exercise (1971)
    Springer
    Pflügers Archiv 326 (1971), S. 152-161 
    Details
    ISSN: 1432-2013
    Keywords: Exercise, Supramaximal ; Lactic Acid, Rate of Production ; Lactic Acid, Energy Equivalent of O2 Debt ; Muscular Exercise, Energy Sources in
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary On 12 subjects of different muscular fitness the rate of lactic acid appearance in blood, while performing the same supramaximal exercise has been determined, together with the maximal performance time and the maximal L.A. concentration in blood. The rate of increase of lactic acid is higher in the less fit than in the athletic subjects, to compensate for the lower oxygen consumption. In all subjects the appearance of L.A. in the blood is delayed: at the onset of the exercise other anaerobic processes (alactic) supply the energy required, and only when these are exhausted L.A. formation enters into play. The energy due to lactic acid corresponds to 37±3.5 ml of O2 per g of lactic acid increase in 1 l of blood, or 50 ml of O2 (or 250 cal) per g of L.A. produced from glycogen. The maximal amount of the lactacid debt is equivalent to about the maximum oxygen consumption in 1 min. A simple relation is found between the time of performance in supramaximal exercise and the maximum oxygen consumption.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586907
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    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
    Keywords: 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
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00586553
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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