caa a22 4500 467939837 CHVBK 20180406153008.0 cr unu---uuuuu 170328e20060901xx s 000 0 eng 10.1007/s00421-006-0248-z doi (NATIONALLICENCE)springer-10.1007/s00421-006-0248-z Exercise-induced breathing patterns of youth are related to age and intensity [Elektronische Daten] [Kristin Ondrak, Robert McMurray] The influences of sex, age, exercise intensity, and end-tidal CO2 on the inspiratory drive ([V Tkg−1]·T i −1) and respiratory timing (T i·T tot −1) components of ventilation were examined in 295 youth (138 females, 157 males); similarly distributed 8-18years of age. Ventilatory and metabolic measures were collected breath-by-breath at rest and during a slow walk (4.0kmh−1), fast walk (5.6kmh−1) and run (8.0kmh−1). Regression modeling for drive (age, sex, and PETCO2) found that sex was significant (R 2<0.017; P<0.05) for rest and running, but not walking. Compared to rest, drive increased by 120% for the slow walk, 217% for the fast walk and 258% for the run (P<0.0001). Drive decreased with age (P<0.0001): rest=0.41mlkg−1s−1year−1; slow walk=0.90mlkg−1s−1year−1; fast walk=1.30mlkg−1s−1year−1; and run=1.47mlkg−1s−1year−1. In the regression models for timing, sex provided ∼1% of the variance during the run, but was not significant during rest or walking. Timing increased with exercise intensity by approximately 0.02units (P<0.001), but decreased by ∼0.002unitsyear−1 with age for all conditions (P<0.003). Changes in drive and timing were marginally related to end-tidal CO2 (exercise R 2<0.063 for all models). These results suggest that in the control of inspiratory drive and timing during exercise in youth, sex is of minor importance but there are age-related changes which are marginally associated with CO2. Springer-Verlag, 2006 Ventilation nationallicence Drive nationallicence Timing nationallicence CO2 nationallicence Ondrak Kristin Department of Exercise and Sport Science, The University of North Carolina, 209 Fetzer Gymnasium, CB #8700, 27599-8700, Chapel Hill, NC, USA aut McMurray Robert Department of Exercise and Sport Science, The University of North Carolina, 209 Fetzer Gymnasium, CB #8700, 27599-8700, Chapel Hill, NC, USA aut European Journal of Applied Physiology Springer-Verlag 98/1(2006-09-01), 88-96 1439-6319 98:1<88 2006 98 421 https://doi.org/10.1007/s00421-006-0248-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0248-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ondrak Kristin Department of Exercise and Sport Science, The University of North Carolina, 209 Fetzer Gymnasium, CB #8700, 27599-8700, Chapel Hill, NC, USA aut NATIONALLICENCE 700 1- McMurray Robert Department of Exercise and Sport Science, The University of North Carolina, 209 Fetzer Gymnasium, CB #8700, 27599-8700, Chapel Hill, NC, USA aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 98/1(2006-09-01), 88-96 1439-6319 98:1<88 2006 98 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer