| Differential contribution of central command to the cardiovascular responses during static exercise of ankle dorsal and plantar flexion in humans. | |
| | |
MedLine Citation:
|
PMID: 21193563 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
To examine whether central command contributes differently to the cardiovascular responses during voluntary static exercise engaged by different muscle groups, we encouraged healthy subjects to perform voluntary and electrically-evoked involuntary static exercise of ankle dorsal and plantar flexion. Each exercise was conducted with 25% of the maximum voluntary force of the right ankle dorsal and plantar flexion, respectively, for 2 minutes. Heart rate (HR) and mean arterial blood pressure (MAP) were recorded and stroke volume (SV), cardiac output (CO), and total peripheral resistance (TPR) were calculated. With voluntary exercise, HR, MAP, and CO significantly increased during dorsal flexion (the maximum increase, HR: 12 ± 2.3 beats min(-1); MAP: 14 ± 2.0 mmHg; CO: 1 ± 0.2 l min-1), while only MAP increased during plantar flexion (the maximum increase, 6 ± 2.0 mmHg). SV and TPR were unchanged throughout the two kinds of voluntary static exercise. With involuntary exercise, there were no significant changes in all cardiovascular variables irrespective of dorsal or plantar flexion. Furthermore, prior to the force onset of voluntary static exercise, HR and MAP started to increase without muscle contraction, while they had no significant changes with involuntary exercise at the moment. The present findings indicate that differential contribution of central command is responsible for the different cardiovascular responses to static exercise depending on the strength of central control of the contracting muscle. |
| | |
Authors:
|
Nan Liang; Tomoko Nakamoto; Seina Mochizuki; Kanji Matsukawa |
Related Documents
:
|
7868473 - A simple isokinetic cycle for measurement of leg muscle function. 1601563 - Efficiency of trained cyclists using circular and noncircular chainrings. 14700383 - Do vocal warm-up exercises alleviate vocal fatigue? |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2010-12-30 |
Journal Detail:
|
Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: - ISSN: 1522-1601 ISO Abbreviation: - Publication Date: 2010 Dec |
Date Detail:
|
Created Date: 2011-1-3 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
1Graduate School of Health Sciences, Hiroshima University. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Chronic heart failure reduces Akt phosphorylation in human skeletal muscle: relationship to muscle s...
Next Document: Associations between sports participation, cardiorespiratory fitness and adiposity in young adult tw...