A Reliability of Electromyographic Normalization Methods for the Infraspinatus Muscle in Healthy Subjects

• Authors: Sung-min Ha , Heon-seock Cynn , Oh-yun Kwon , Kyue-nam Park , Gyoung-mo Kim
• Languages of publication: EN

Abstracts

EN

The purpose of this study was to examine the test-retest reliability of normalization methods for the infraspinatus muscle in a group of healthy subjects. Twelve healthy subjects (male=8, female=4) performed the maximal voluntary isometric contraction (MVIC) with examiner`s resistance, MVIC with a digital tension-meter (MVIC-DT), and sub-MVIC methods. Surface electromyography (EMG) signals were recorded from the infraspinatus muscles according to normalization methods. Reliability was analyzed using the intra-class coefficient (ICC), standard error of measurement (SEM), and minimal detectable difference (MDD). The results of the present study demonstrated that the sub-MVIC method has excellent test-retest reliability (ICC=0.92) with a relatively small SEM (5.9 mV) and MDD95 (16.4 mV), compared to MVIC-DT (ICC=0.73; SEM=11.2 mV; MDD95: 31 mV) and MVIC-E (ICC=0.5; SEM=15.7 mV; MDD95: 43.6 mV). These findings provide evidence that sub-MVIC is more appropriate for comparing the EMG activity for the infraspinatus muscle as a normalization method. If MVIC for normalization is needed, MVIC-DT is more appropriate than MVIC-E.

Keywords

EN

lectromyography; infraspinatus muscle; normalization; reliability

• Publisher: De Gruyter Open
• Journal: Journal of Human Kinetics
• Year: 2013
• Volume: 36
• Issue: 1
• Pages: 69-76

Dates

published

1 - 03 - 2013

online

13 - 04 - 2013

Contributors

author

Sung-min Ha

• Department of Physical Therapy, Division of Health Science, Baekseok University, Cheon-an, Republic of Korea

author

Heon-seock Cynn

• Applied Kinesiology and Ergonomic Technology Laboratory, Department of Physical Therapy, College of Health Science, Yonsei University, Won-ju, Republic of Korea

author

Oh-yun Kwon

• Laboratory of Kinetic Ergocise Based on Movement Analysis, Department of Physical Therapy, College of Health Science, Yonsei University, Won-ju, Republic of Korea

author

Kyue-nam Park

• Laboratory of Kinetic Ergocise Based on Movement Analysis, Department of Physical Therapy, College of Health Science, Yonsei University, Won-ju, Republic of Korea

author

Gyoung-mo Kim

• Department of Physical Therapy, Division of Health Science, Baekseok University, Cheon-an, Republic of Korea

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Identifiers

DOI

10.2478/hukin-2013-0007