Strength-velocity profile in professional argentine soccer players

Abstract

Introduction: The strength-speed profile is an accurate, reliable, simple, fast and low-cost assessment tool for the determination of the strength-speed relationship in the lower limbs by means of vertical jumping, from which it is possible to establish the percentage of strength-speed imbalance or deficit with respect to an optimal profile and design an individualized training program. Objective: To identify the characteristics of the strength-speed profiles in male players of Argentine professional soccer of the first national. Methodology: Ten professional soccer players (26.9±3 years old) performed a squat jump test (SJ) on the jumping platform (Axon Jump), with five progressive loads (0, 25, 50, 75 and 100%) of the body mass, to later analyze the variables F0, V0, Pmax, Sfv, Sfvopt, FVimb and determine the optimal F-V profiles. Results: The results obtained show that the absolute maximum power was 1921.1±215.7 W, with a relative maximum power of 24.7±2.25 W/kg, an F0 of 2611.6±273.4 N in absolute terms, an F0 of 33.5±1.28 N/kg in relative terms and a V0 of 2.94±0.24 m/s; with an average jump height SJ, of 39.5±0.31 cm; with a FVimb of 88.8±7.36%. Significant correlations were presented between absolute maximum power and with the maximum jump height with 0 kg (r=.657; p=.003) and the relative maximum power with the maximum jump height with 0 kg (r=.893; p=.001). On the other hand, a significant correlation was found between the maximum power of the jump with load 0 and the absolute maximum power (r=.987; p=.001), in addition to a negative relationship between the FVimb and the relative Pmax (r= -.674; p=.003). The F-V profile has a linear correlation coefficient (r2 >0.95). Conclusions: It is concluded that there are different types of profiles in the group of soccer players evaluated: 50 % of the sample presents imbalances with low strength deficit, and the other 50 % presents an optimal level of less than (±10%), so it is considered that they have a balanced profile.