Whole-body-vibration-induced increase in leg muscle activity during different squat exercises
| Deutscher übersetzter Titel: | Ganzkörpervibrationsinduzierte Zunahme der Beinmuskelaktivität während unterschiedlicher Kniebeugeübungen |
|---|---|
| Autor: | Roelants, Machteld; Verschueren, Sabine M.P.; Delecluse, Christophe; Levin, Oron; Stijnen, Valére |
| Erschienen in: | Journal of strength and conditioning research |
| Veröffentlicht: | 20 (2006), 1, S. 124-129, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Gedruckte Ressource |
| Sprache: | Englisch |
| ISSN: | 1064-8011, 1533-4287 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU201205003314 |
| Quelle: | BISp |
Abstract
This study analyzed leg muscle activity during whole-body vibration (WBV) training. Subjects performed standard unloaded isometric exercises on a vibrating platform (Power Plate): high squat (HS), low squat (LS), and 1-legged squat (OL). Muscle activity of the rectus femoris, vastus lateralis, vastus medialis, and gastrocnemius was recorded in 15 men (age 21.2 +/- 0.8 years) through use of surface electromyography (EMG). The exercises were performed in 2 conditions: with WBV and without (control [CO]) a vibratory stimulus of 35 Hz. Muscle activation during WBV was compared with CO and with muscle activation during isolated maximal voluntary contractions (MVCs). Whole-body vibration resulted in a significantly higher (p < 0.05) EMG root-mean-square compared with CO in all muscle groups and all exercises (between 139.9 +/- 17.5% and 1360.6 +/- 57.5%). The increase in muscle activity caused by WBV was significantly higher (p < 0.05) in OL compared with HS and LS. In conclusion, WBV resulted in an increased activation of the leg muscles. During WBV, leg muscle activity varied between 12.6 and 82.4% of MVC values. Verf.-Referat