Research article summary (published 30 May 2005):

Effects of the muscle pump and body posture on cardiovascular responses during recovery from cycle exercise.

Full Abstract

The purpose of the study was to characterize the effects of muscular contractions (the muscle pump) and body posture on cardiovascular responses during recovery from moderate exercise in the upright-sitting or supine positions. Heart rate (HR), stroke volume (SV), and cardiac output (CO) were measured in seven young male subjects at rest and during 10-min of cycle exercise at 60% of peak oxygen uptake (VO2peak). This was followed by either complete rest for 5 min (inactive recovery) or cycling at VO2peak for 5 min (active recovery) in the upright or supine positions. In the upright position, an initial rapid decrease in HR was followed by a gradual decrease in HR, and this response was similar when comparing inactive and active recoveries. Upright SV during inactive recovery decreased gradually to the pre-exercise resting level, whereas upright SV during active recovery remained significantly elevated. In contrast, in the supine position, the HR during active recovery decreased, but remained significantly higher than that during inactive recovery. Changes in supine SV were similar when comparing inactive and active recovery. Thus, maintenance of SV and HR resulted in significantly greater CO during active recovery than during inactive recovery, regardless of body position. HR was greater during supine active-recovery than during supine inactive-recovery, and there was no difference in SV. These data suggest that the muscle pump is less important in facilitating venous return and vagal resumption in the supine position as compared to the upright position.

Author information

Author/s: Takahashi, Tatsuhisa (T); Hayano, Junichiro (J); Okada, Akiyoshi (A); Saitoh, Tadashi (T); Kamiya, Akira (A);

Affiliation: Department of Mathematical Information Science, Asahikawa Medical College, Asahikawa 078-8510, Japan. ryushow(-atsign-)asahikawa-med.ac.jp

Journal and publication information

Publication Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article

Journal: European journal of applied physiology (Eur J Appl Physiol), published in Germany. (Language: eng)

Reference: 2005-Aug; vol 94 (issue 5-6) : pp 576-83

Dates: Created 2005/07/26; Completed 2005/10/20; Revised 2008/11/21;

PMID: 15928933, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: 18 Feb 2009 00:00:00)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Bicycling - physiology Cardiac Output - physiology Exercise Test Heart Rate - physiology Humans Male Muscle Contraction - physiology

Muscle Contraction - physiology Muscle, Skeletal - physiology Oxygen Consumption - physiology Physical Exertion - physiology Posture - physiology Recovery of Function - physiology Rest - physiology Stroke Volume - physiology

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