Resumen
To determine test-retest reliability of a surface electromyographic protocol designed to measure knee joint muscle activation during walking in individuals with knee osteoarthritis (OA). Twenty-one individuals with moderate medial compartment knee OA completed two gait data collections separated by approximately 1month. Using a standardized protocol, surface electromyograms from rectus femoris plus lateral and medial sites for the gastrocnemii, vastii and hamstring muscles were recorded during walking. After full-wave rectification and low pass filtering, time and amplitude normalized (percent of maximum) waveforms were calculated. Principal component analysis (PP-scores) and co-contraction indices (CCI) were calculated from the waveforms. Intraclass correlation coefficients (ICC2,k) were calculated for PP-scores and CCI's. No differences in walking speed, knee muscle strength and symptoms were found between visits (p>0.05). The majority of PP-scores (17 of 21) and two of four CCIs demonstrated ICC2,k values greater than 0.81. Remaining PP-scores and CCIs had ICC2,k values between 0.61 and 0.80. The results support that reliable EMG characteristics can be captured from a moderate knee OA patient population using a standardized protocol.
Idioma original | English |
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Páginas (desde-hasta) | 334-341 |
Número de páginas | 8 |
Publicación | Journal of Electromyography and Kinesiology |
Volumen | 23 |
N.º | 2 |
DOI | |
Estado | Published - abr. 2013 |
ASJC Scopus Subject Areas
- Neuroscience (miscellaneous)
- Biophysics
- Clinical Neurology
PubMed: MeSH publication types
- Journal Article
- Research Support, Non-U.S. Gov't