Chapter-1 / Physiological Foundations - WHNLive Public Library

m 1m I O2 uptake a a characteristic value of the energetic r rv of~_I%il,"tli 0 ygen uptake i an indicatorpaJrtic:ulllrl in port medicine, of th~formance capacity of the organism.mElaslued hen the individual is subjectedCOlfttiftuously increasing train with an ergo-~2.ner. n tate of exhau tion is reached,uptake levels off. The numericaluptake in the plateau phase is anof the maximum 02 uptake or ofp rformance capacity. This figure isGl8l1Jlosti ally very informative, as it can also1n a a ind of characteristic value of the"j~"etic reserves of the organism. It wouldtheltet-ore be desirable for measurement devicesroutine determination of the resting O2uJ)'talc:e and the maximal O2 uptake to go into- cale production in the not too distante pected curve for the maximal O2 uptake2 -rna dependent on age in normal personsbe een in Fig. 22. The course of the curveo that this characteristic value drops con-. uou ly and steeply after the age of about 20.the age of 80 the figure is only approxirnaely 42 % of the maximum in youth. Thec osed circles entered give an idea of the meanvariation, and the points marked with a crowere obtained from enior sportsmen. It canclearly be seen that the reduction in the maximalO2 uptake occurs much more slowly inelderly, physically active persons than in normalpersons. The documented result is a seriouswarning to able-bodied persons not to neglectregular training (cardiovascular training) even inlater years [58].The lower part of the same figure shows theexpected curve for the resting O 2 uptakedependent on age. On the basis of the level ofthe youthful age of 20-25 years, a drop in theresting O2 uptake, e.g. at the age of 80, of approximately62 % can be seen. In physicallyactive persons of the same age group, the respectivevalue drops to about 60-70 % of themaximum. At the bottom of the same figure,measurements of the resting O2 uptake afterimplementation of the 02MT have been enteredas typical examples.It seemed advisable for practical reasons todesign the measuring set-up in such a way thatboth the maximal and the resting O2 uptakecould be measured by the same apparatus. Thismtkgmm~-max6050o302010----=scale fora70 kg persontOz 4 I+elderly SPorfsme1 % maximum• normal personsmin10o3r~ • + ft• ++ +++• • +90• +~+ + + + +-,.~ • + + ::::s 80Ci • Q•-Q~ ..... it •~~+ ~~ ~ •• Ie .+70 afler OzMT§- §•6K4-JI~'" ~ t:::i 60~ .0' ~.c:(wtfh training)~C;)'-~2§ ~ 501a, . ,~ ~ ~c::J "~ 40~ QE:300,8 c:::J\0,6dropm Ozuptake10Ol-uptake durmg/est ---ace to Boothby62%0,4---I,.,, ~rfnQ 0.2I I Io 10 20 30 40 50 60 70 80 90 100 yeorsage-..c:::..c:::20Fig.22 Maximal 02 uptakeQO max as characteristicva~ue of the cardiopulmonalsystem dependenton age, for normalpersons and elderlysportsmen ace. to Strauzenbergas well as restingO2 absorption and00 2at rest (STPD con·ditions) dependent onage for a normal personcalculated ace. to (48]and 02MT patients