The effects of a 6-week unilateral strength and ballistic jump training program on the force-velocity profiles of sprinting

Bettariga, Francesco, Maestroni, Luca, Martorelli, Luca, Turner, Anthony N. ORCID: https://orcid.org/0000-0002-5121-432X and Bishop, Chris ORCID: https://orcid.org/0000-0002-1505-1287 (2022) The effects of a 6-week unilateral strength and ballistic jump training program on the force-velocity profiles of sprinting. Journal of Science in Sport and Exercise . ISSN 2096-6709 [Article] (Accepted/In press)

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Abstract

The aims of this study were: a) to investigate the effects of a unilateral training program, compared to a control group, on F-V profile in soccer players; b) to explore such effects on linear speed. Twenty-four soccer players, randomly assigned to a 6-week unilateral strength and ballistic jump training (UNI) (n = 12) or a control group (CON) (n = 12), performed 30 meter linear sprint test. Findings showed small to moderate improvements (p < 0.05) in linear speed time (g = 0.66 to 0.81) and in most F-V variables: maximal running velocity (V0) (g = 0.81), maximal power output (Pmax) (g = 0.49), maximal ratio of force (RFmax) (g = 0.55), optimal velocity (Vopt) (g = 0.83) and maximal speed (g = 0.84) from pre- to post-intervention in the UNI group, whereas no meaningful changes were found in the CON group. The between-group comparison indicated small to large significant changes in V0 (g = 0.95), RFmax (g = 0.48), Vopt (g = 0.95), maximal speed (g = 0.98) and linear speed time performance (g = 0.42 to 1.02), with the exception of the 0-5 meter distance, in favour of the UNI group. Thus, a unilateral strength and ballistic jump training program can be used to improve the F-V profile and linear speed performance of amateur soccer players.

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