caa a22 4500 46905591X CHVBK 20180323132843.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00717951 doi (NATIONALLICENCE)springer-10.1007/BF00717951 Dynamic linearity of V O2 responses during aerobic exercise [Elektronische Daten] [Uwe Hoffmann, Dieter Eßfeld, Hans-Georg Wunderlich, Jürgen Stegemann] Summary: The multifrequent pseudorandom binary sequence (PRBS) technique is a useful tool for studying oxygen uptake ( $$\dot VO_2 $$ ) kinetics within the aerobic range. However, the validity of this multifrequent test may be limited by nonlinearities generated by the circulatory and pulmonary system. To check for such nonlinear effects, we compared the frequency responses computed from two PRBS protocols with the results of pure sinusoidal frequencies varying in amplitude and mean values (periods between 50 s and 450 s). According to our results the $$\dot VO_2 $$ frequency response does not seem to depend on the type of testing — PRBS or sine — or the changes within each test, i.e. mean power and power amplitude of the sine tests and the switching frequency of the PRBS. In the range of higher frequencies small differences between the test conditions may have been obscured by the greater scatter of dynamic responses. It was concluded that the $$\dot VO_2 $$ frequency response was quasi-linear for periods down to at least 100 s. However, even in this range nonlinearities can be provoked by rest-exercise transitions, by a varying contribution of lactate or by an insufficient noise reduction. Springer-Verlag, 1992 Oxygen uptake kinetics nationallicence Frequency response nationallicence Pseudorandom binary sequence nationallicence Sinusoidal testing nationallicence Humans nationallicence Hoffmann Uwe Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut Eßfeld Dieter Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut Wunderlich Hans-Georg Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut Stegemann Jürgen Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/2(1992-03-01), 139-144 0301-5548 64:2<139 1992 64 421 https://doi.org/10.1007/BF00717951 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00717951 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hoffmann Uwe Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut NATIONALLICENCE 700 1- Eßfeld Dieter Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut NATIONALLICENCE 700 1- Wunderlich Hans-Georg Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut NATIONALLICENCE 700 1- Stegemann Jürgen Physiologisches Institut der Deutschen Sporthochschule Köln, Carl-Diem-Weg 6, W-5000, Cologne 41, Federal Republic of Germany aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/2(1992-03-01), 139-144 0301-5548 64:2<139 1992 64 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer