ISSN:
1439-6327
Keywords:
Water immersion
;
Ventilation
;
Gasp response
;
Oxygen uptake
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary The principal cause of the immediate transient elevation in ventilation ( $$\dot V_E$$ , L · min−1) and oxygen uptake ( $$\dot V_{O_2 }$$ , L · min−1), when a human subject is immersed in cold water is considered to be the stimulation of cutaneous cold receptors. The present study demonstrates that the initial $$\dot V_E$$ and $$\dot V_{O_2 }$$ responses are comprised of a thermogenic and a hydrostatic component. The peak values in $$\dot V_E$$ reached (mean±SD) 66.8+-22.3, 53.9±38.1, 32.2±15.4, 22.5±3.6, 19.5±4.6 L · min−1 during the first minute of immersion in 10°, 15°, 20°, 28° and 40° C water, respectively. Similarly, peaks (mean±SD) in $$\dot V_{O_2 }$$ of 1.22±0.25, 1.01±0.32, 0.98±0.39, 0.81±0.09, and 0.78±0.26 L · O2 · min−1, were reached when subjects were immersed in 10°, 15°, 20°, 28°, and 40° C water. It is concluded that the observed increases in $$\dot V_{O_2 }$$ during the first minute of immersion are partly due to the increased hydrostatic pressure causing a shift of venous blood towards the thoracic region, and a transient increase in the uptake of oxygen into the blood.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02330712
Permalink
