NDLI: Ventilatory response at the onset of voluntary exercise and passive movement in endurance runners

Content Provider	Springer Nature Link
Author	Miyamura, Miharu Ishida, Koji Hashimoto, Isao Yuza, buo
Copyright Year	1997
Abstract	The present study was performed to examine whether or not the ventilatory response at the onset of voluntary exercise and passive movement in endurance runners is the same as in untrained subjects. Twelve long-distance runners belonging to the varsity athletic club and 13 untrained subjects of our university participated as subjects in this study. Maximum oxygen uptake was significantly higher in the endurance runner group [mean (SD) 70.8 (4.7) ml · kg−1 · min−1] than in the untrained group [49.8 (6.3) ml · kg−1 · min−1]. Cardiorespiratory responses during voluntary exercise and passive movement of alternate flexion-extension of the right and left legs for about 15 s at a frequency of about 60 rpm, were determined by means of breath-by-breath techniques. Minute inspiratory ventilation (V˙ I), tidal volume (V T), respiratory frequency (f b), cardiac output (Q˙ c), stroke volume (SV) and heart rate (HR) increased significantly immediately at the onset of voluntary exercise and passive movement. The incremental rate for V˙ I was greater than that for Q˙ c. Average values and standard deviations of changes in V˙ I were calculated as the difference between the mean of the first and second breath and the mean of five breaths preceding the exercise or movement. The rates obtained in voluntary exercise and passive movement in the endurance runner group [2.34 (0.82) and 1.72 (0.71 l · min−1), respectively] were significantly (P<0.05) lower than those in the untrained group [4.16 (2.66) and 2.71 (1.56 l · min−1), respectively]. Also changes in V T and HR were significantly lower in the endurance group than in the untrained group with regard to both voluntary exercise and passive movement. The results suggest that the magnitude of cardiorespiratory responses at the onset of voluntary exercise and passive movement in humans is influenced by chronic endurance training for long periods.
Starting Page	221
Ending Page	229
Page Count	9
File Format	PDF
ISSN	03015548
Journal	European Journal of Applied Physiology
Volume Number	76
Issue Number	3
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-08-11
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Public Health, Environmental and Occupational Health

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