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Title: Study of mechanical characteristics of the knee extensor and flexor musculature of volleyball players
Authors: Rodríguez-Ruiz, David 
Rodríguez-Matoso, Dario
Quiroga Escudero, Miriam Esther 
Sarmiento Montesdeoca, Samuel 
García Manso, Juan Manuel 
da Silvagrigoletto, Marzo E.
UNESCO Clasification: 241106 Fisiología del ejercicio
Keywords: Tensiomyography
Issue Date: 2012
Publisher: 1746-1391
Journal: European Journal of Sport Science 
Abstract: The aim of the present study was to analyse differences in muscle response and mechanical characteristics of the vastus medialis, rectus femoris, vastus lateralis, and biceps femoris in elite volleyball players of both sexes using tensiomyography. To this end, 47 players of nine nationalities playing for teams in the men's and women's Spanish Superleagues were assessed. The sample comprised 22 women (age 24.6±4.3 years; weight 72.14±10.06 kg; height 178.40±8.50 cm) and 25 men (age 25.0±4.3 years; weight 88.76±9.07 kg; height 194.71±7.84 cm). Tensiomyography was used to assess muscular response and muscular mechanical characteristics. For this purpose, the following variables were analysed: maximum radial displacement of muscle belly and normalized response speed. The findings show, both in men and women, a higher normalized response speed score in the vastus lateralis and vastus medialis compared with the rectus femoris and biceps femoris. A marked lateral symmetry of maximum radial displacement of the muscle belly was also observed in the musculature of the lower limbs, with no statistically significant differences being detected in either men or women. There were, however, clear differences in terms of normalized response speed between male and female volleyball players: women displayed a more pronounced difference in the normalized response speed of the musculature responsible for extension (vastus medialis, rectus femoris, and vastus lateralis) and flexion (biceps femoris) of the knee joint than men. Moreover, tensiomyography proved to be a highly sensitive tool for detecting such changes.
ISSN: 1746-1391
DOI: 10.1080/17461391.2011.568633
Source: European Journal of Sport Science[ISSN 1746-1391],v. 12, p. 399-407
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