Isometric training with maximal co-contraction instruction does not increase co-activation during exercises against external resistances
Deutscher übersetzter Titel: | Isometrisches Training mit maximaler Co-Kontraktionsanweisung erhöht nicht die Co-Aktivierung während eines Widerstandstrainings |
---|---|
Autor: | Driss, Tarak; Serrau, Virgile; Behm, David George; Lesne-Chabran, Ethelle; Le Pellec-Muller, Armande; Vandewalle, Henry |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 32 (2014), 1, S. 60-69, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640414.2013.805238 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201407006400 |
Quelle: | BISp |
Abstract
The present investigation verified that strength is improved by a training programme consisting of repetitions of maximal isometric voluntary co-contractions without increasing co-activations during contractions against external resistances. Ten participants performed 12 training sessions (four sets of 6 × 4 second maximal isometric co-contraction of the elbow flexor and extensors, 3 days a week for 4 weeks). Surface electromyograms of triceps and biceps brachii were collected during maximal voluntary isometric elbow flexion and extension against a force transducer. Maximal voluntary isometric force increased significantly after training, by 13.8 ± 6.0% (extension) and 9.6 ± 9.5% (flexion), but the observed increases in EMG of agonist muscles during maximal voluntary contraction were not significant. No significant changes in the levels of co-activation of the elbow flexors and extensors were observed. No significant change was observed for all the parameters in a control group of ten participants. These results indicated that the strength improvements after co-contraction training occur without increases in co-activation level. Verf.-Referat