Reliability of EMG power-spectrum and amplitude of the semitendinosus and biceps femoris muscles during ramp isometric contractions
| Autor: | Athanasios Katis, Eleftherios Kellis |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Adult
Male medicine.medical_specialty Knee Joint Intraclass correlation Biophysics Neuroscience (miscellaneous) Electromyography Isometric exercise Biceps Physical medicine and rehabilitation Reference Values Isometric Contraction medicine Humans Range of Motion Articular Muscle Skeletal Mathematics medicine.diagnostic_test Reproducibility of Results Signal Processing Computer-Assisted Anatomy musculoskeletal system body regions medicine.anatomical_structure Ligament Neurology (clinical) Range of motion Hamstring |
| Zdroj: | Journal of Electromyography and Kinesiology. 18:351-358 |
| ISSN: | 1050-6411 |
| DOI: | 10.1016/j.jelekin.2006.12.001 |
| Popis: | Appropriate reliability is a necessary condition for the use of surface EMG for evaluation of hamstring muscle function in cases of knee joint pathologies or ligament injuries. The aim of the study was to investigate the test-retest reliability of power spectrum and amplitude of surface electromyographic (EMG) measurements of semitendinosus (ST) and biceps femoris (BF) during ramp isometric contractions. Eleven males performed maximum isometric contractions (MVC) of the knee flexors in two sessions, a week apart with simultaneous recording of surface EMG of the BF and ST. Intra class correlation (ICC) and standard error measurements (SEM) were applied to assess test-retest reliability of the averaged EMG (aEMG) and the median frequency (MF) over 10 levels of force, from 0% to 100% of the maximum. The ICC values ranged from 0.38 to 0.96 for the aEMG with SEM values reaching 11.37% of MVC. For the MF, the ICCs ranged from 0.44 to 0.98 (SEM range 4.49-18.19Hz). In our set up, ramp contractions can be used to examine hamstring EMG patterns with acceptable reliability. |
| Databáze: | OpenAIRE |
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