| 摘要 |
The invention relates to a system and a process for determining the individual anaerobic threshold of a living organism. The individual anaerobic threshold is determined using a system for the dynamic determination of the respiratory, metabolic and/or ventilatory variables during a process or influence promoting lactate production. The system comprises a computer (18), with a display unit and a computational unit, and, connected via an analyser (22) to the computer, a device such as a mask (20) for determining the respiratory minute volume as well as the O2 and CO2 content of the respiratory minute volume of the inhaled and exhaled air, respectively. In the computational unit, a variable x is calculated, as a function of the work (P) performed per unit time, from the measurement variables (i), (ii) and (iii), according to an algorithm (iv). A curve is adjusted to, or plotted from, the values x = f(P). The point on the curve x = f(P) at which the derivative dx(P) / dP is equal to zero or exhibits maximum discontinuity defines the load value (PIAT) corresponding to the individual anaerobic threshold. The individual anaerobic threshold of the living organism can therefore be determined without continuous lactate determination on a blood sample.
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