Resumen

VAZQUEZ-GUERRERO, Jairo  y  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.  https://dx.doi.org/10.4321/S1578-84232015000300029.

The purposes of the present study were to: a) monitor and compare velocity_peak 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. Velocity_peak 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 velocity_peak did not show significant differences when performing squats under both conditions during the season. Velocity_peak 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.

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

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