FUNCTIONAL MOVEMENT SCREEN AND LOWER LIMB STRENGTH ASYMMETRY IN PROFESSIONAL SOCCER PLAYERS

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Abstract

Background

The Functional Movement Screen (FMS) protocol consists of 7 tests (Cook & Burton, 2014). At higher values mean higher quality of movement execution. Lower limb functional asymmetry (FA) is monitored to control the athlete's injury risk (Sannicandro et al., 2011).

Objective

To examine the correlation between the FMS score and strength asymmetry in professional soccer players (PSP).

Design

Descriptive study (correlation study investigating the relationship between variables).

Setting

Professional soccer.

Participants

n=30 professional soccer players (age: 22.2±4.6; weight: 74.3±10,1 kg; height: 176.1±8.7 cm), 4 players were excluded due to joint or muscle injury within the last 18 months.

Assessment of Risk Factors

The FMS protocol identifies athletes as being at risk of injury when the total score is ≤14. The Hop Test (HT), Side Hop (SH) and Hop Crossover (CH) test are considered to represent a valid assessment of the single lower limb FA. The counter movement jump (CMJ) test indirectly evaluates explosive strength capacity (jump height).

Main Outcome Measurements

The sample was evaluated using the 7 FMS test and CMJ, HT, SH and CH tests for strength capacity. FA was calculated between the two limbs as follows: (jump dominant limb–jump non-dominant limb)/jump dominant-limb*100 (Yamamoto, 1993).

Results

We observed a significant inverse correlation between FMS score and the SH asymmetry percentage (r=−0.678, p<0.01) and the CH asymmetry percentage (r=−0.572,p<0.01). We also observed a significant positive correlation between the FMS score and CMJ values (r=0.531, p<0.01). No significant correlation was found between FMS and the HT asymmetry percentage (r=−0.245).

Conclusions

The best quality movement in FMS test was correlated with high performance in CMJ and with low percentage of lower limb FA, respectively.

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