Document Detail

Acute plasma volume change with high intensity sprint exercise.
MedLine Citation:
PMID:  23302756     Owner:  NLM     Status:  Publisher    
ABSTRACT: When exercise is of long duration or of moderate to high intensity, a decrease in plasma volume can be observed. This has been noted for both aerobic and resistance exercise but few data are available with regards to high intensity sprint exercise. We measured plasma volume before and following three different bouts of acute exercise, of varying intensity and/or duration. On different days, men (n=12; 21-35 years) performed aerobic cycle exercise (60 min at 70% heart rate reserve) and two different bouts of cycle sprints (five, 60 sec sprints at 100% max wattage obtained during graded exercise testing (GXT); and ten, 15 sec sprints at 200% max wattage obtained during GXT). Blood was collected before and 0, 30, and 60-minutes post-exercise and analyzed for hematocrit and hemoglobin; plasma volume was calculated. Plasma volume decreased significantly for all exercise bouts (p<0.05), with the greatest decrease noted 0 minutes post-exercise for both sprint bouts (∼19%) compared to aerobic exercise bouts (∼11%). By 30 minutes post-exercise, plasma volume approached pre-exercise values. We conclude that acute bouts of exercise, in particular high intensity sprint exercise, significantly decrease plasma volume during the immediate post-exercise period. It is unknown what, if any negative implications these transient changes may have on exercise performance. Strength and conditioning professionals may aim to rehydrate athletes appropriately following high intensity exercise bouts.
Richard J Bloomer; Tyler M Farney
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-8
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  -     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Cardiorespiratory/Metabolic Laboratory, The University of Memphis, Memphis, TN 38152.
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