HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Submit a response Alert me when this article is cited Alert me when Rapid Responses are posted Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Sobush, D. C Articles by Davis, A. S Search for Related Content PubMed PubMed Citation Articles by Sobush, D. C Articles by Davis, A. S Social Bookmarking                      What's this?

Influence of Aerobic Fitness on Cardiovascular Responses During Slow Head-Down Tilting

Mr. Sobush is Associate Professor, Program in Physical Therapy, Marquette University, Milwaukee, WI 53233 (USA).
Mr. Nosse is Associate Professor, Program in Physical Therapy, Marquette University.
Dr. Davis was Assistant Professor of Mathematics, Statistics and Computer Science, Marquette University, when this study was conducted. She is now Senior Statistician, Criterion Inc, Dallas, TX 75240.

This study examined the influence of cardiorespiratory fitness (CRF) on mean heart rate (HR), systolic blood pressure (SBP), and diastolic blood pressure (DBP) responses to slow head-down tilting. Twenty-four young, healthy volunteers were tilted randomly from the horizontal plane to –30, –60, and –90 degrees with lower limbs extended or flexed. A multivariate analysis of variance between three independent variables (level of CRF, tilt angle, and lower limb position) and three dependent variables (mean HR, SBP, and DBP) was performed on the cardiovascular changes from an initial horizontal baseline value (absolute change) and from a horizontal value that immediately preceded tilting angles (relative change). The results for significant absolute cardiovascular changes indicated a CRF influence on HR increase (F = 6.42, p < .05), a tilt-angle influence on SBP increase (F = 9.56, p < .001), and DBP increase (F = 6.49, p < .01) and an interaction influence between CRF level and limb position for DBP (F = 5.83, p < .05). Significant relative cardiovascular change was noted for tilt-angle influence on HR (F = 9.04, p .001). We conclude, therefore, that physical therapists should consider the CRF of individuals and the tilt angle to be used before they conduct slow head-down tilting for therapy.

Key Words: Blood pressure • Cardiovascular system • Gravitation • Heart rate • Physical therapy

CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?