Die Aktivität der Rückenstreckmuskulatur beim aufrechten Stehen und beim Sitzen mit standidentischer Rumpfhaltung - eine elektromyographische Studie
| Autor: | Ch. Hopf, Eysel P, F. Bodem, Betz U |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
medicine.medical_specialty
medicine.diagnostic_test business.industry Biomechanics Healthy subjects Isometric exercise Electromyography equipment and supplies Sitting Back muscles Physical medicine and rehabilitation medicine Physical therapy Orthopedics and Sports Medicine Surgery Lower back muscle business human activities health care economics and organizations Rachis |
| Zdroj: | Zeitschrift für Orthopädie und ihre Grenzgebiete. 139:147-151 |
| ISSN: | 1438-941X 0044-3220 |
| Popis: | Problem: There is a controversial discussion about the loading of the spine by the force of the extending muscles of the back in upright sitting with the back curved as in upright standing. Experimental studies investigating this issue are still lacking. Methods: In the study presented in this paper we measured in 30 subjects the activity of the extending back muscles both in a natural upright standing posture and in sitting with identical posture of the back as recommended in some back training programs. To this end we recorded the electromyographical surface activity of the back muscles at four levels of the spine in both postures. The EMG activities were intraindividually normalized with reference to the respective activity recorded at maximum voluntary isometric contraction (MVC). Results: At three of the four levels of the spine examined, the group averages of the EMG activity in sitting were significantly higher than in standing (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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