Kinesiology, Vol. 29 No. 1, 1997.
Original scientific paper
Relative plasma volume decrease during all-out laboratory exercise in variously active males
János Mészáros
; Department of Health Sciences and Sports Medicine, Hungarian University of Physical Education, Budapest
Nelson K. Ng
; Physical Education Department, Slippery Rock University, Slippery Rock PA, USA
János Mohácsi
; Department of Health Sciences and Sports Medicine, Hungarian University of Physical Education, Budapest
Iván Szmodis
; Central School of Sports, Budapest
András Prókai
; Department of Health Sciences and Sports Medicine, Hungarian University of Physical Education, Budapest
Róbert Frenkl
; Department of Health Sciences and Sports Medicine, Hungarian University of Physical Education, Budapest
Abstract
Relative plasma volume decrease has mostly been studied in exercises of long duration and without respect to habitual physical activity. Anthropometric characteristics and peak exercise plasma volume decrease were compared in adult male non-athletic subjects (n=20), PE students (n=25) and League 1 soccer players (n=25). Height, body mass, Conrad (1963) indices, muscle and fat body mass were compared. The all-out exercise was performed on the treadmill. Hematology studied by the QBC AUTOREADER technique at rest and immediately after exercise was carried out in 30 pl arterialized blood samples. Relative plasma volume decrease was estimated by Greenleaf and Hinghofer-Szalkay’s (1985) method. Except for mononuclear cell percentage, the initial hematology was similar in all the groups. Peak-exercise plasma volume decrease was significantly smaller, mononuclear percentage was significantly larger in the physically active groups. The greater mononuclear cell percentage is likely to be one of the indicators of such regulatory processes that play an important role in the smaller peak-exercise plasma volume decrease in the physically active groups.
Keywords
plasma volume decrease, physical activity, body composition, all-out exercise
Hrčak ID:
255858
URI
Publication date:
15.4.1997.
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