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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hollman, John H. Hohl, Jeffrey M. Kraft, Jordan L. Strauss, Jeffrey D. Traver, Katie J. |
| Description | Country affiliation: United States Author Affiliation: Hollman JH ( Department of Physical Medicine & Rehabilitation, Program in Physical Therapy, College of Medicine, Mayo Clinic, Rochester, MN 55905, USA. hollman.john@mayo.edu) |
| Abstract | Reduced median frequencies (MDFs) are the hallmark of muscle fatigue in an electromyogram (EMG), the magnitude of which may be influenced by window lengths in fast Fourier transformation (FFT) algorithms used to compute power spectra. This study examined whether MDF reductions in fatigued muscles differed across varying FFT windows. EMG data were acquired from the gluteus maximus and semitendinosus muscles during a modified Biering-Sørensen test. Data were processed through varying FFT windows (0.1-, 0.5-, 1.0-, 2.0- and 5.0-s) and MDF slopes were compared with repeated measures analyses of variance. While FFT windows influenced variability in MDFs, the slopes did not differ across window lengths in either muscle group. When muscle fatigue is assessed via MDF slopes during submaximal isometric contractions, the FFT windows through which spectral characteristics are processed may have little bearing on results. |
| File Format | HTM / HTML |
| ISSN | 09666362 |
| Issue Number | 1 |
| Volume Number | 38 |
| e-ISSN | 18792219 |
| Journal | Gait & Posture |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-05-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Orthopedics Data Interpretation, Statistical Humans Journal Article Young Adult Fourier Analysis Algorithms Isometric Contraction Female Electromyography Statistics & Numerical Data Physiology Muscle, Skeletal Muscle Fatigue |
| Content Type | Text |
| Resource Type | Article |
| Subject | Orthopedics and Sports Medicine Rehabilitation Biophysics Sports Science |
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