-transparent.png){kind=logo}
Low level exercise is frequently used to assess cardiac and pulmonary function. This study examines the differences in both metabolic and respiratory patterns between the sitting and supine position. Six normal male subjects were studied in both positions during four levels of exercise (12.5, 25, 37.5 and 50 W). Oxygen consumption (VO2), carbon dioxide production (VCO2) and minute ventilation (VE) were greater when sitting as were the ventilatory equivalents to O2 (VE/VO2) and CO2 (VE/VCO2). Respiration was compared at equivalent workloads; the greater minute ventilation observed during sitting was due to greater tidal volumes (VT) and mean inspiratory flows (VT/TI). Expiratory time (TE) was longer and inspiratory duration shorter under most conditions when sitting. When breathing patterns were compared at similar degrees of minute ventilation, VT, TE and VT/TI were greater when sitting, while respiratory frequency (fR) was slower.
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
October 1984,
Respiration physiology,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
September 1981,
The Journal of clinical investigation,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
January 1969,
Federation proceedings,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
July 1960,
Journal of applied physiology,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
January 1982,
Medicine and science in sports and exercise,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
March 1961,
Journal of applied physiology,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
January 1986,
European journal of applied physiology and occupational physiology,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
March 1979,
Journal of applied physiology: respiratory, environmental and exercise physiology,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
May 1993,
Medicine and science in sports and exercise,
C Weissman, and
J Askanazi, and
S H Rosenbaum, and
A I Hyman, and
J Milic-Emili, and
J M Kinney
January 1971,
Anesthesiology,
