Abstract des Autors

Using a model simulation approach, based on a 2-compartment-model of lactate kinetics expanded by a representation of lactate production during physical exertion, we investigated physiological determinants of two different methods for a determination of the aerobic-anaerobic transition ("anaerobic threshold" - 4 mmol/l lactate concentration resp. "individual anaerobic threshold" - "Freiburger Modell"). The simulation analysis revealed that changes of the primary physiological determinant "aerobic energy flow" are projected in an almost linear manner both onto the work loads at the anaerobic threshold and the individual anaerobic threshold. Variations of parameters of lactate kinetics interfere with the determination of the characteristic variables, an effect more pronounced in the "Freiburger Modell". This cross sensitivity of the variables to changes in lactate kinetics leads to the desired effect of an individualisation of this approach. Verf.-Referat