caa a22 4500 469055758 CHVBK 20180323132843.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF00625059 doi (NATIONALLICENCE)springer-10.1007/BF00625059 Ventilatory dynamics in children and adults during sinusoidal exercise [Elektronische Daten] [P. Haouzi, Y. Fukuba, R. Peslin, B. Chalon, F. Marchal, J. Crance] Summary: The ventilatory response to sinusoidally varying exercise was studied in five adults and seven prepubertal children to determine whether the faster kinetics of ventilation observed in children during abrupt changes in exercise intensity remained more rapid when exercise intensity varied continuously. Each subject exercised on a cycle ergometer first against a constant load and then against a load fluctuating over six different periods ranging from 0.75 to 10 min. The pedal rate was kept constant for all loads. The inspiratory minute ventilation was determined breath-by-breath. Amplitude (A) and phase angle (ϕ) of the fundamental component and the first harmonics of the ventilatory response were calculated by Fourier analysis for an integer number of waves for each period. From the relationship between A, ϕ and frequency, dynamic parameters of a first order model with and without delay were compared between adults and children. Firstly we found that the ventilatory time constant was significantly faster in children: 49.7 (SD 9.1) s vs 74.6 (SD 11.1) s (P<0.01). Secondly, the change in A and ϕ with the frequency was not however characteristic of a first order system without delay in most of the subjects ϕ > 90° for the shorter periods). Thirdly, even when the ventilatory control system was described as a first order model with a positive delay, time constants remained significantly shorter in children: 45.6 (SD 5.7) s vs 67.4 (SD 13) s (P<0.01). The ability to increase ventilation faster in children appeared to be a characteristic of the ventilatory control system during exercise independent of the type of drive used. Springer-Verlag, 1992 Exercise hyperpnoea nationallicence Ventilatory kinetics nationallicence Children nationallicence Haouzi P. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut Fukuba Y. Department of Biometrics, Research Institute for Nuclear Medicine and Biology, Hiroshima University, Japan aut Peslin R. Unité INSERM 14, Vandœuvre-lès-Nancy, France aut Chalon B. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut Marchal F. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut Crance J. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/5(1992-09-01), 410-418 0301-5548 64:5<410 1992 64 421 https://doi.org/10.1007/BF00625059 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00625059 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Haouzi P. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut NATIONALLICENCE 700 1- Fukuba Y. Department of Biometrics, Research Institute for Nuclear Medicine and Biology, Hiroshima University, Japan aut NATIONALLICENCE 700 1- Peslin R. Unité INSERM 14, Vandœuvre-lès-Nancy, France aut NATIONALLICENCE 700 1- Chalon B. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut NATIONALLICENCE 700 1- Marchal F. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut NATIONALLICENCE 700 1- Crance J. Laboratoire de Physiologic, Faculté de Médecine de Nancy, Avenue de la Forêt de Haye, B.P. 184, F-54505, Vandœuvre-lès-Nancy Cedex, France aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 64/5(1992-09-01), 410-418 0301-5548 64:5<410 1992 64 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer