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. 2014 Oct 10:42:81-90.
doi: 10.2478/hukin-2014-0063. eCollection 2014 Sep 29.

Kinematic analysis of the instep kick in youth soccer players

Alen Kapidžić  1 , Tarik Huremović  1 , Alija Biberovic  1
Affiliations

Kinematic analysis of the instep kick in youth soccer players

Alen Kapidžić et al. J Hum Kinet. .

Abstract

We attempted to establish which applied kinematic variables significantly contributed to the efficiency of the instep kick motion in soccer. The study sample comprised 13 boys (age: 13 ± 0.5 yrs; body mass: 41.50 ± 8.40 kg; body height: 151.46 ± 5.93 cm) from the FC Sloboda school of soccer. Each participant performed three kicks with maximum strength that were video recorded with two synchronized cameras (Casio Ex-F1) positioned 12 m away from the place of the kick. Data were collected by analyzing the video recordings of each kick. Data processing was performed using the APAS motion analysis system (Ariel Dynamics Inc., San Diego, CA). On the basis of the forward selection method of multiple regression analysis, we determined the correlations between the prediction variables and the selected criteria (speed of the ball; p = 0.01). On the basis of the regression coefficients, it was concluded that two variables significantly contributed to the speed of the ball: speed of the foot of the kicking leg at the time of contact with the ball (p = 0.01) and the distance between the angle support leg and center of the ball ("foot posterior displacement") (p = 0.01). In order to achieve the best possible technical performance and, therefore, a higher speed of the ball, soccer players must pay attention to two important elements during training. First, it is necessary to position the support leg as close to the ball as possible and, second, maximize the force used in the initial phases of the kick to achieve a high speed of the kicking foot.

Keywords: biomechanics; foot; kicking technique; knee angle; support leg; velocity.

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Figures

Figure 1
Figure 1
The speed of the swing foot (Fspeed3) at the time of contact with the ball
Figure 2
Figure 2
The speed of the ball (Vball) over time during an instep kick
Figure 3
Figure 3
A kinogram of the kicking phase demonstrating the distance between the support foot and the bal.
Picture 1
Picture 1
A scheme of the testing protocol
Picture 2
Picture 2
Space calibration
See this image and copyright information in PMC

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