Document Detail

Changes in plasma volume following intense intermittent exercise in neutral and hot environmental conditions.
MedLine Citation:
PMID:  9638028     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: The purpose of the present investigation was to examine the effect of supramaximal short duration intermittent exercise in neutral and hot environmental conditions on changes in plasma volume. The return of plasma volume (PV) to pre-exercise values following different recovery conditions was also examined. METHODS: Experimental design. Within subject design in which one way analysis of variance was conducted. SETTING: Research, sports science academic institute. PARTICIPANTS: Ten trained men, 25.5 +/- 3/1 (yrs), volunteers. INTERVENTIONS: Subjects performed six 1-min bouts of exercise at 100% VO2peak on a cycle ergometer, with 4-min rest intervals between the bouts. Each subject exercised twice in thermoneutral (22 degrees C, 40% RH) and twice in hot (35 degrees C, 30% RH) conditions. Exercise was followed by either 40 min of passive recovery (sitting) or by 20 min active recovery (cycling at 35% VO2peak) and 20 min passive recovery, named thereafter "active recovery". MEASURES: Hematocrit (Hct) and hemoglobin (Hb) were determined upon entry into the climatic chamber following 20 min rest in the chamber (pre-exercise), immediately postexercise, and 40 min postexercise. From the changes in Hct and Hb, PV changes were calculated. RESULTS: There was a significant decrease in PV immediately postexercise. However, there was no significant difference between the two types of environmental conditions and no difference between the two types of recovery. PV increased significantly following recovery and returned to pre-exercise values following 40 min of recovery. CONCLUSIONS: Changes in PV caused by maximal short duration cycling bouts is not affected by environmental conditions, PV returns to its pre-exercise values within 40 min of recovery regardless of the recovery mode.
A Rotstein; B Falk; M Einbinder; L Zigel
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  38     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  1998 Mar 
Date Detail:
Created Date:  1998-07-17     Completed Date:  1998-07-17     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  24-9     Citation Subset:  IM    
Zinman College of Physical Education and Sport Sciences, Wingate Institute, Netanya, Israel.
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MeSH Terms
Analysis of Variance
Exercise / physiology*
Heart Rate
Hot Temperature*
Oxygen Consumption
Plasma Volume*
Skin Temperature

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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