It is well known the traditional concept that the O
2-kinetics following exercise is bestdeschbed by a bi-exponential curve (its called `fast'and`slow component').This study wasmade an attempt to evolve an estimation method of parameters of fast and slow componentin O
2 uptake during recovery.The method described here was based on the weighted leastsquare method.Its validity was exermined by means of the application to simulation data.Furthermore, its availability was checked by means of the comparison between estimatedparameters by this method and an ordinary method.The results of this study were;1) a sufficient validity of estimations by this method wasconfirmed because it was not seen a bias of estimated values against the true value of eachparameter, and 2) higher accuracy of estimations by this method was found as compared withthat by an ordinary method.It is pointed out, however, that the lack of data in relation to fastcomponent, i.e., rough sampling interval in initial phase during recovery, affects the accuracyof estimation, and that it is necessary to appear the nature of errors existed in observationvalues.
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