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Cuadernos de Psicología del Deporte

On-line version ISSN 1989-5879Print version ISSN 1578-8423


VAZQUEZ-GUERRERO, Jairo  and  MORAS, Gerard. Changes in muscular architecture and execution velocity during squats performed using the VersaPulley under stable and unstable conditions in junior elite basketball players. CPD [online]. 2015, vol.15, n.3, pp.243-252. ISSN 1989-5879.

The purposes of the present study were to: a) monitor and compare velocitypeak when performing squats with VersaPulley (VP) on stable conditions (CE) and on unstable conditions (CI) in elite junior basketball players during a season and b) assess the changes in muscle architecture (AM). Seven junior basketball players performed the technical-tactical training and the physical fitness of the season (16 weekly hours) adding extra strength training performing squats with the VP under CE and CI. Velocitypeak when performing the squats was assessed during the season through T-FORCE system. Moreover, every 3 months the AM of the vastus lateralis was assessed. Results indicated that velocitypeak did not show significant differences when performing squats under both conditions during the season. Velocitypeak increased 17% under CE and 23% under CI (p<0.01). The muscle thickness (p = 0.009) and the pennation angle (p < 0.05) increased whilst the fascicle length did not show significant differences. The regular basketball training and the strength training, including squats performed with VP under CE and CI, increased a long de season in a basketball elite junior players. Moreover, we founded changes in AM.

Keywords : strength training; instability; rotational inertia; muscular thickness; pennation angle; basketball; youth.

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