caa a22 4500 469054395 CHVBK 20180323132839.0 cr unu---uuuuu 170328e19920501xx s 000 0 eng 10.1007/BF00705087 doi (NATIONALLICENCE)springer-10.1007/BF00705087 Changes in ventilation at the start and end of moderate and heavy exercise of short and long duration [Elektronische Daten] [Jason Mateika, James Duffin] Summary: These experiments examined the effect of exercise intensity and duration on the magnitude of the abrupt change in ventilation at the start ( $$\dot V_{E,start} $$ ) and end ( $$\dot V_{E,end} $$ ) of exercise. Five subjects performed constant load treadmill exercise at 50% and 80% of their maximum oxygen consumption ( $$\dot VO_{2\max } $$ ) for 6 and 10 min while inspiring atmospheric air. The subjects also completed additional exercise tests at 80% $$\dot VO_{2\max } $$ for 10 min while inspiring an oxygen-enriched gas mixture. During each exercise trial ventilation was measured breath-by-breath. The $$\dot V_{E,start} $$ and $$\dot V_{E,end} $$ were determined by using non-linear curve-fitting techniques. The results showed that $$\dot V_{E,start} $$ was greater at the start of the 80-% exercise tests compared to the 50-% tests and that $$\dot V_{E,start} $$ at each level of exercise was greater than $$\dot V_{E,end} $$ . The results also demonstrated that $$\dot V_{E,end} $$ was inversely related to the intensity and duration of exercise. Furthermore, the $$\dot V_{E,end} $$ was not altered subsequent to the inspiration of oxygen-enriched air. These findings have led us to postulate that the stimulus responsible for $$\dot V_{E,start} $$ is reduced during exercise and that the degree of reduction is related to the intensity and duration of exercise. In addition, it was concluded that these changes might occur independently of peripheral chemoreceptor activity. Springer-Verlag, 1992 Moderate exercise nationallicence Heavy exercise nationallicence Exercise duration nationallicence Exercise transitions nationallicence Short-term potentiation nationallicence Mateika Jason Departments of Anaesthesia and Physiology, University of Toronto, M5S 1A8, Ontario, Canada aut Duffin James Departments of Anaesthesia and Physiology, University of Toronto, M5S 1A8, Ontario, Canada aut European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/3(1992-05-01), 234-240 0301-5548 65:3<234 1992 65 421 https://doi.org/10.1007/BF00705087 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00705087 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mateika Jason Departments of Anaesthesia and Physiology, University of Toronto, M5S 1A8, Ontario, Canada aut NATIONALLICENCE 700 1- Duffin James Departments of Anaesthesia and Physiology, University of Toronto, M5S 1A8, Ontario, Canada aut NATIONALLICENCE 773 0- European Journal of Applied Physiology and Occupational Physiology Springer-Verlag 65/3(1992-05-01), 234-240 0301-5548 65:3<234 1992 65 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer