Document Detail


Limitation of muscle deoxygenation in the triceps during incremental arm cranking in women.
MedLine Citation:
PMID:  14566566     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The present study investigated the difference in oxygen kinetics in the exercising muscle between arm cranking and leg cycling in women. Twenty-seven females completed incremental arm cranking and leg cycling tests on separate days. During each exercise, spatially resolved near-infrared spectroscopy was used to measure changes in the tissue oxygen saturation ( SO(2)), oxygenated (oxy-) hemoglobin and/or myoglobin (Hb/Mb), deoxygenated (deoxy-) Hb/Mb, and total Hb/Mb in the triceps during arm cranking and in the vastus lateralis during leg cycling. During arm cranking, there was a rapid increase in the respiratory exchange ratio and a lower ventilatory threshold compared to leg cycling, which confirmed accelerated anaerobic glycolysis in this mode of exercise. During leg cycling, SO(2) remained decreased near to or until approaching peak oxygen uptake (VO(2peak)). During arm cranking, however, the decrease in oxy-Hb/Mb and increase in deoxy-Hb/Mb stopped at the middle of VO(2peak) (mean 51.4%), consequently resulting in a leveling off in the SO(2 )decrease, although total Hb/Mb continued to increase. These results might suggest that the oxygen demand in the triceps attained the maximum at that intensity, despite an adequate oxygen supply during arm cranking.
Authors:
Satoshi Muraki; Noriaki Tsunawake; Masahiro Yamasaki
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-10-18
Journal Detail:
Title:  European journal of applied physiology     Volume:  91     ISSN:  1439-6319     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-03-01     Completed Date:  2004-10-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  246-52     Citation Subset:  IM    
Affiliation:
Department of Human Living System Design, Kyushu University, 4-9-1 Shiobaru, Minami-ku, 815-8540, Fukuoka, Japan. muraki@design.kyushu-u.ac.jp
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Anaerobic Threshold / physiology*
Arm / physiology*
Exercise / physiology*
Exercise Test / methods
Female
Humans
Leg / physiology*
Muscle, Skeletal / physiology*
Oxygen / metabolism*
Oxygen Consumption / physiology*
Chemical
Reg. No./Substance:
7782-44-7/Oxygen

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


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