Document Detail

Effects of a 6-mo endurance-training program on venous compliance and maximal lower body negative pressure in older men and women.
MedLine Citation:
PMID:  15831798     Owner:  NLM     Status:  MEDLINE    
Aging and chronic exercise training influence leg venous compliance. Venous compliance affects responses to an orthostatic stress. The extent to which exercise training in a previously sedentary older population will affect venous compliance and tolerance to the simulated orthostatic stress of maximal lower body negative pressure (LBNP) is unknown. The purpose of this investigation is to determine the influence of a 6-mo endurance-training program on calf venous compliance and responses and tolerance to maximal LBNP in older men and women. Twenty participants (exercise group: n = 10, 5 men, 5 women; control group: n = 10, 6 men, 4 women; all >60 yr) underwent graded LBNP to presyncope or 4 min at -100 mmHg before and after a 6-mo endurance-training program. Utilizing venous occlusion plethysmography, calf venous compliance was determined in both groups using the first derivative of the pressure-volume relation during cuff pressure reduction before training, at 3 mo, and at the end of the training program. The exercise group improved their fitness with the 6-mo endurance-training program, whereas the control group did not change (14 +/- 3 vs. <1 +/- 2%; P < 0.05). LBNP tolerance did not differ between groups or across trials (P = 0.47). Venous compliance was not different between groups or trials, either initially or after 3 mo of endurance training, but tended to be greater in the exercise group after 6 mo of training (P = 0.08). These data suggest that a 6-mo endurance-training program may improve venous compliance without affecting tolerance to maximal LBNP in older participants.
Juliane P Hernandez; Warren D Franke
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Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article     Date:  2005-04-14
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  99     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-08-16     Completed Date:  2005-10-27     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1070-7     Citation Subset:  IM    
Dept. of Physical Education, Southern Illinois Univ., 109 Davies Hall, mail code 4310, Carbondale, IL 62901-4310, USA.
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MeSH Terms
Adaptation, Physiological / physiology
Aging / physiology*
Blood Pressure / physiology
Exercise / physiology*
Hemostasis / physiology
Leg / blood supply,  physiology
Lower Body Negative Pressure / methods*
Physical Endurance / physiology*
Physical Fitness / physiology*
Sex Factors
Vascular Capacitance / physiology*
Veins / physiology*

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

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