کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4335927 1295189 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reliability of absolute versus log-transformed regression models for examining the torque-related patterns of response for mechanomyographic amplitude
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Reliability of absolute versus log-transformed regression models for examining the torque-related patterns of response for mechanomyographic amplitude
چکیده انگلیسی

This study examined the test–retest reliability of the slopes (b) and y-intercepts (a) of the absolute and log-transformed regression models applied to the mechanomyographic amplitude (MMGRMS) versus torque (TQ) relationship. Fifteen participants (mean ± SD age = 23 ± 4 yrs) performed two isometric maximal voluntary contractions (MVCs) and ten randomly ordered isometric leg extensions from 5% to 95% of their MVC during three separate trials. MMGRMS was recorded from the vastus lateralis during each MVC. Intraclass correlation coefficients (ICCs) and standard errors of measurement (SEMs) were calculated for test–retest reliability. ICCs for the b and a terms were 0.89 and 0.90 for the log-transformed and 0.85 and 0.76 for the absolute relationships, respectively. The SEM values (expressed as a percentage of the mean) for the b and a terms were 9.7% and 16.4% for the log-transformed and 18.9% and 57.1% for the absolute relationships, respectively. These results indicated that the b and a terms from both the absolute linear and log-transformed MMGRMS versus TQ relationships were relatively reliable (ICCs), however, the SEMs for the log-transformed relationships were lower than the absolute linear models. Furthermore, the b term from the log-transformed relationships may provide unique information regarding the nonlinear characteristics (plateau points) of the MMGRMS versus TQ relationship, whereas the a term may indicate upward or downward shifts in MMGRMS across the TQ spectrum. Thus, the log-transformed MMGRMS versus TQ relationships may offer an attractive alternative method for reliably quantifying and tracking changes in the TQ-related patterns of response for MMGRMS on a subject-by-subject basis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Neuroscience Methods - Volume 179, Issue 2, 15 May 2009, Pages 240–246
نویسندگان
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