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Title:The Relationship Between Torque and IEMG During Proportional Shortening of the Biceps Brachii Muscle
Author(s):Piper, Fontaine C.
Doctoral Committee Chair(s):Groppel, Jack L.,
Department / Program:Kinesiology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Education, Physical
Abstract:The purpose of this investigation was to determine the relationship between torque and IEMG during proportional shortening of the biceps brachii muscle where the angular displacement to each subject was based upon the resting length of their muscle. Thirty male subjects participated in the investigation after giving informed consent. The results of the investigation supported the conclusion that the relationship between torque and IEMG is not influenced by the varying lengths of human muscle. When the degrees of flexion were adjusted, based upon the resting length of the muscle, it was found that this factor did not significantly influence the relationship obtained.
When investigating the relationship between torque and IEMG during isometric contractions the results supported the conclusion that the torque generated at various points along a range of motion are significantly related. The results further indicate that IEMG produced as a result of each contraction are significantly related. The results did not support the conclusion that the torque and resulting IEMG were related at the selected points of investigation along the range of motion investigated.
This investigator believes that the following five (5) factors perhaps influenced the results obtained. (1) There was an inability to adequately stabilize the upper body during the flexion task. This was attributed to the design of the upper body extremity table manufactured by Lumex, Inc. (2) The variation in subject strength could influence the torque generation at various levels of muscle involvement. (3) Variations in the percent of slow twitch and fast twitch fibers in the biceps brachii. (4) The determination of the length of the muscle involved may have been influenced by the regression equations developed from cadaver specimens. (5) The physical effort of the subjects was not evaluated. This investigator observed that the motivational level of the subjects varied and could have been a factor.
Issue Date:1988
Description:77 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1988.
Other Identifier(s):(UMI)AAI8823227
Date Available in IDEALS:2014-12-16
Date Deposited:1988

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