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Interrelation of Football Players’ (13 to 14 Years Old) Indices of Movement in Various Directions

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Radžiukynas D., Žilinskienė N., Kemerytė-Riaubienė E., Gražulis D.

Central European Journal of Sport Sciences and Medicine

2015

vol. 9

issue 1

37-46

The aim of the work – to establish motor skills peculiarities in young football players (aged 13 to 14 years). Methods of the research: Tests for speed and velocity and Tensodynamometry (Radžiukynas 1997). Average height of football players is 168 cm, their body mass – 55.84 kilos, BMI – 19.58. The vertical body movement speed in two foot take-off of the players is 2.49 m/sec, running results: in 10 m run – 1.88 sec (5.31 m/sec), in 20 m run – 3.31 sec (6.04 m/sec), in 30 m run – 4.68 sec (6.41 m/sec), jumping in hexagon area result – 17.16 sec, angular movement result – 2.35 m/sec. Individual movement skills are expressed by kinematic and kinetic indices of interaction with support, such as: squat time (0.348 sec), take-off duration (0.249 sec), squat speed (1.02 m/sec), squat depth (19.5 cm), reactivity of legs’ muscles (22.1 Hz), jump height (31.4 cm), absolute power of take-off (1555 N), relative capacity (28.5 W). Football players do not experience fatigue performing intense two foot vertical jumps, in average 45 jumps in 30 sec. Correlation analysis of all movement directions kinematic and kinetic indices relation significance highlighted the main indices which most objectively allow evaluation, prognosis, and correction of various directions movement level and abilities of young football players. Alteration of these indices’ significance interrelation shows peculiarities of athletes’ body functional systems’ adaptation to training loads, also serves as an effective methodical direction in improving preparation of young football players.

Relationship between Jump Test Results and Acceleration Phase of Sprint Performance in National and Regional 100m Sprinters

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Habibi A., Shabani M., Rahimi E., Fatemi R., Najafi A., Analoei H., Hosseini M.

Journal of Human Kinetics

2010

vol. 23

29-35

The purpose of this research was to identify the relationship between jump test results and acceleration phase of sprint performance in national and regional 100m sprinters. Fifteen male (age 21.89 ± 3.26 years; body height 1.72.66 ± 3.20 m; body mass 61.35 ± 11.40 kg; 100 m personal best: 11.67 + 0.46 s {11.00 - 12.19}) track sprinters at a national and regional competitive level performed 10 m sprints from a block start. Anthropometric dimensions, along with squat jump (SJ), countermovement jump (CMJ), continuous straight legged jump (SLJ), single leg hop for distance, and single leg triple hop for distance measures of power were also tested. Pearson correlation analysis revealed the single leg hop for distance with front and back leg (respectively, r = -0.74 and r = -0.76; p = 0.021 and p = 0.017), and the single leg triple hop for distance with front and/or back leg (respectively, r = -0.84 and r = -0.89; p = 0.004 and p = 0.001), generated capabilities to be strongly related to sprint performance. Further linear regression analysis predicted an increase in the single leg hop for distance with front and back leg of 10 cm, to both resulted in a decrease of 0.07 s in 10 m sprint performance. Further, an increase in the single leg triple hop for distance with front and/or back leg of 10 cm was predicted to result in a 0.08 s reduction in 10 m sprint time. The results of this study seem to suggest that the ability to gain more distance with the single leg hop and the single leg triple hop for distance to be good indicators for predicting sprint performance over 10 m from a block start.

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1 Central European Journal of Sport Sciences and Medicine

1 Journal of Human Kinetics

1 2015

1 2010

1 Analoei H.

1 Fatemi R.

1 Gražulis D.

1 Habibi A.

1 Hosseini M.

1 Kemerytė-Riaubienė E.

1 Najafi A.

1 Radžiukynas D.

1 Rahimi E.

1 Shabani M.

1 Žilinskienė N.

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Interrelation of Football Players’ (13 to 14 Years Old) Indices of Movement in Various Directions

Relationship between Jump Test Results and Acceleration Phase of Sprint Performance in National and Regional 100m Sprinters