NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Cardiovascular responses to exercise as functions of absolute and relative work loadThe roles of absolute and relative oxygen uptake (VO2 and percent of muscle group specific VO2-max) as determinants of the cardiovascular and ventilatory responses to exercise over a wide range of active muscle mass are investigated. Experiments were conducted using four types of dynamic exercise: one-arm curl, one-arm cranking, and one and two-leg cycling at four different relative work loads (25, 50, 75, and 100 percent of VO2-max) for the corresponding muscle group. Results show that VO2 during maximal one-arm curl, one-arm cranking, and one-leg cycling averaged 20, 50, and 75 percent, respectively, of that for maximal two-leg cycling. Cardiac output was determined to be linearly related to VO2 with a similar slope and intercept for each type of exercise, and the heart rate at a given percent VO2-max was higher with larger active muscle mass. It is concluded that the cardiovascular responses to exercise was determined to a large extent by the active muscle mass and the absolute oxygen uptake, with the principal feature appearing to be the tight linkage between systematic oxygen transport and utilization.
Document ID
19830051599
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lewis, S. F.
(Texas Univ. Health Science Center Dallas, TX, United States)
Taylor, W. F.
(Texas Univ. Health Science Center Dallas, TX, United States)
Graham, R. M.
(Texas Univ. Health Science Center Dallas, TX, United States)
Pettinger, W. A.
(Texas Univ. Health Science Center Dallas, TX, United States)
Schutte, J. E.
(Texas Univ. Health Science Center Dallas, TX, United States)
Blomqvist, C. G.
(Texas, University, Health Science Center Dallas, TX, United States)
Date Acquired
August 11, 2013
Publication Date
May 1, 1983
Publication Information
Publication: Journal of Applied Physiology: Respiratory, Environmental and Exercise Physiology
Volume: 54
ISSN: 0161-7567
Subject Category
Aerospace Medicine
Accession Number
83A32817
Funding Number(s)
CONTRACT_GRANT: NIH-HL-17669-08
CONTRACT_GRANT: NIH-HL-06296
CONTRACT_GRANT: NSG-9026
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available