Change of Direction Speed in Soccer Players is Enhanced by Functional Inertial Eccentric Overload an

International journal of sports physiology and performance (Impact Factor: 2.66). 05/2015; 11(1). DOI: 10.1123/ijspp.2015-0010

Source: PubMed

ABSTRACT

This study examined the effects of a novel iso-inertial eccentric overload and vibration training (EVT) paradigm on change of direction speed and multiple performance tests applicable to soccer. Twenty-four young, male players were assigned to EVT (n=12) or conventional combined (CONV, n=12) group, once weekly for 11 weeks. EVT consisted of 2 sets of 6-10 repetitions in 5 specific and 3 complementary exercises. CONV used comparable volume (2 sets of 6-10 reps in 3 sequences of 3 exercises) of conventional combined weight, plyometric and linear speed exercises. Pre- and post intervention tests included 25-m sprint with 4 x 45° change of direction (COD) every 5th m (V-cut test), 10- and 30-m sprints, repeat sprint ability (RSA), countermovement jump (CMJ) and hopping (RJ5). Group comparison showed very likely to likely better performance for EVT in the COD (effect size; ES=1.42), 30-m (ES=0.98), 10-m (ES=1.17), and average power (ES=0.69) and jumping height (ES=0.69) during RJ5. There was a large (r=-0.55) relationship between the increase in average hopping power and the reduced V-cut time. As EVT, not CONV, improved COD ability but also linear speed and reactive jumping, this "proof-of-principle" study suggests this novel exercise paradigm performed once weekly, could serve as a viable adjunct to improve performance tasks specific to soccer.

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