Electromyographic activity during maximal isometric contraction combined with local sinusoidal vibration
| Autor: | Bruno Resende, Bruno Pena Couto, João Soldati, Rafael Soncin Ribeiro, Jacielle Carolina Ferreira, João de Oliveira Claudino, Leszek Antoni Szmuchrowski |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Physiology
Acoustics Physical Therapy Sports Therapy and Rehabilitation Isometric exercise Sitting Accelerometer Vibratory stimulus Vibration Acceleration sinusoidal vibration Amplitude Sports medicine electromyographic activity isometric strength QP1-981 Orthopedics and Sports Medicine Sinusoidal vibration RC1200-1245 |
| Zdroj: | Biomedical Human Kinetics, Vol 3, Iss 2011, Pp 35-38 (2011) |
| ISSN: | 2080-2234 |
| Popis: | Electromyographic activity during maximal isometric contraction combined with local sinusoidal vibration Study aim: To compare the electromyographic activity during maximal isometric contraction alone or combined with local sinusoidal vibration. Material and methods: A group of 6 men aged 23 - 29 years performed 3 maximal voluntary contractions of the dominant elbow flexors lasting 10 s each and separated by 5-min intermissions. One repetition was without vibration, one was associated with 15-Hz and the other one with 20-Hz vibrations of 5-mm amplitude, the sequence of repetitions being random. A new system to generate local vibration was applied, the parameters of the vibratory stimulus being measured using an accelerometer. Force and EMG activity were also measured. The subjects performed the task in sitting position in a Scott Bench-type device. Results: Mean acceleration RMS significantly (p Conclusion: The local vibration applied was not enough to generate different responses in EMG activity. The features of vibratory stimulus confirmed the expected frequency range and revealed frequencies around 5 Hz, that could be attributed to muscle tremor. |
| Databáze: | OpenAIRE |
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