Abstract

Introduction: The muscular strength between the dominant and non-dominant legs of soccer players has beenthe centre of research that has highlighted contradictory results. Several researchers have reported symmetrybetween the dominant and non-dominant legs, whereas others suggest the existence of a significant asymmetry.Kicking and cutting skills in soccer are clearly unilateral, require asymmetrical motor patterns and can lead tothe development of asymmetrical adaptations in the musculoskeletal function of the lower limbs (Fousekis etal., 2010). The purpose of this study was to examine the flight time [FT] and jump height [JH] during a vertical one-leggedcountermovement jump by dominant leg [VOL-CMJ-DL] and non-dominant leg [VOL-CMJ-NDL] in soccer players (SPs).Methods: Eighteen male players of a soccer team (soccer training age: 9.22+/-1.47 years), 14 right-footed SPs(age: 14.36+/-0.50 years, height: 1.64+/-0.06 m, body weight: 53.42+/-7.20 Kg, BMI: 19.63+/-1.88) and 4left-footed SPs (age: 14.25+/-0.50 years, height: 1.65+/-0.06 m, body weight: 57.27+/-10.90 Kg, BMI: 20.70+/-2.54) were analyzed by Optojump system (Microgate, Bolzano, Italy). The optical acquisition system allowed themeasurement of contact and flight time during a jump to a precision of 1/1000s.Results: We did not observe any significant difference in FT and JH during the vertical one-leggedcountermovement jump by right and left leg in subjects (FT: 0.32+/-0.04 vs. 0.32 +/-0.03 s, JH: 13.80 +/-4.05vs. 13.20 +/-3.24 cm). Moreover, we did not show any significant influence of subjects’ lateral dominance onunipedal vertical jump performances. In fact, SPs with right lateral dominance showed similar FT (VOL-CMJ-DL:0.32+/-0.05 vs. VOL-CMJ-NDL: 0.32 +/-0.04 s) and JH (VOL-CMJ-DL: 13.58 +/-4.53 vs. VOL-CMJ-NDL: 13.42 +/-3.61 cm) during unipedal tests by right and left leg; likewise SPs with left lateral dominance showed similar FT(VOL-CMJ-DL: 0.31+/-0.01 vs VOL-CMJ-NDL: 0.34 +/-0.02 s) and JH (VOL-CMJ-DL: 12.42 +/-1.43 vs VOL-CMJNDL:14.57 +/-1.79 cm) in VOL-CMJ-DL and VOL-CMJ-NDL.Discussion / Conclusion: These data are in accordance with Capranica et al. (1992) who showed an increase offorce and power of both legs regardless of lateral dominance in soccer players. In particular, the balanced musclepower in both lower limbs could decrease the risk of soccer injuries in studied players in agreement with Fousensiset al. (2010) that showed as soccer players with a longer professional training age seem to adopt a more balanceduse of their lower extremities to cope with asymmetrical motor patterns of soccer game.References:› Fousekis, K., Τsepis, E. & Vagenas, G. (2010). Lower limb strength in professional soccer players: profile, asymmetry, and trainingage. Journal of Sports Science and Medicine, 9:364-73.› Capranica, L., Cama, G., Fanton, F., Tessitore, A. & Figura, F. (1992). Force and power ofpreferred and non-preferred leg in young soccer players. The Journal of SportsMedicine and Physical Fitness, 32(4), 358-63.
Lingua originaleEnglish
Pagine56-56
Numero di pagine1
Stato di pubblicazionePublished - 2011

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