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  • Title: [Physical exertion tolerance after water immersion].
    Author: Shul'zhenko EB, Gogolev KI, Beliaev SM.
    Journal: Kosm Biol Aviakosm Med; 1983; 17(1):40-5. PubMed ID: 6843069.
    Abstract:
    Before and after 24-hour water immersion test subjects performed a submaximal workload on a bicycle ergometer. Changes in their hematocrit, circulating plasma volume and fluid balance were compared with those during immersion. As a result, the test subjects were subdivided into two groups. For one group the workload was very hard; adaptation to immersion was accompanied by significant renal losses of fluid from the intra- and extravascular space. The bicycle ergometry test after immersion demonstrated a decrease of exercise tolerance combined with circulatory disorders. The other group showed a higher exercise tolerance; after immersion exercise tolerance remained high at the expense of the reserves that maintained optimal blood supply to the working muscles.
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