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The differences in results of preliminary selection in team sports as the premise to define a profile of a "young football player"

100%

Stihec J., Sroka R.

Central European Journal of Sport Sciences and Medicine

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2013

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tom 04

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nr 4

The aim of the work was to define the differences between boys selected for football training and their peers at the beginning stage of different team sports training, as well as those that do not practice any sports discipline. The research material consisted of 97 schoolboys at the age of 10 selected to practice team sports, including football, and 39 non-training boys. All boys attended Szczecin primary schools. Apart from the basic anthropometric characteristics, the following motor skills were analyzed: kinesthetic differentiation, reaction speed, movement frequency, spatial orientation, static balance, maximal lactic anaerobic power, maximal nonlactic anaerobic power, fast muscle activation, aerobic endurance and absolute muscle strength. Not all test results are expressed in SI units. Data obtained through the applied method served as the grounds for defining a profile of a “young football player” as the premise to improve the process of preliminary selection for football. Candidates selected for soccer training presented higher level of kinesthetic differentiation than all other examined boys. They also presented higher level of movement frequency than volleyball players and higher level of space orientation than the not-trained boys. Soccer players nevertheless presented lover level of time of reaction than the candidates selected for basketball training. Results of all condition abilities tests obtained by soccer players were statistically significant better than the one obtained by the untrained boys (p ≤ 0.001) and the candidates for volleyball training (p ≤ 0.05, p ≤ 0.001). The greatest differences were noticed in tests of aerobic endurance and maximal non-lactic and lactic anaerobic power.

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The application of molecular markers in the process of selection

100%

Masojc P.

Cellular and Molecular Biology Letters

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2002

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tom 07

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nr 2A

Molecular markers are modern diagnostic tools, which may help breeders to solve practical problems. They facilitate cultivar Identification, the determination of genetic similarities among breeding stocks and enable the calculation of polymorphism level, heterozygosity or self-pollination rate. But the main expectation with respect to molecular markers is their potential use in marker-assisted selection (MAS). There are four major strategies of finding a molecular marker tightly linked to a target gene of agronomie importance. The first approach takes advantage of the nearly isogenic lines (NILs) which are differentiated only by the allelic sets in the gene of interest and in the adjacent chromosomal region. The second strategy involves bulked segregant analysis (BSA) for identification of markers linked to a single gene. The third involves the genetic dissection of more complex traits, which leads to the identification of quantitative trait loci (QTL) and their markers. The fourth strategy of marker identification includes computer databases (sequence and mapping data). The usefulness of these strategies is discussed in this paper. Some consequences of the application of BSA for gene tagging are described.

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Identifying talented handball players - the possibilities of examining the players by means of speed-force and coordination tests

67%

Zubik M., Spieszny M., Sumara M.

Central European Journal of Sport Sciences and Medicine

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2013

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tom 04

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nr 4

The main aim of this thesis was to assess the usefulness of the chosen tests of motor skills (focused mainly on the work of the lower and upper limbs) and the computerized motor skills tests in identifying the talented handball players. To examine them, the players’ results from two junior teams were compared. The first test was performed before the players started high school, that is, at the age of sixteen. The results were compared with the sport level examined during the second test, performed when the players reached the senior age (nineteen years old). The Spearman’s rank correlation coefficient among the ranking results (sport level), somatic features and motor skills, was used in the analysis, with the level of statistical significance being p < 0,05. Significant statistical correlations were discovered between the level of anaerobic force of the examined handball players when they are sixteen, and their sport level when they are nineteen years old. The significant statistical correlations may be one reason to use the tests of speed-force skills to identify the talented handball players described in this thesis. Among the coordination skills, only the multitasking ability proved to have significant statistical correlations with the players’ sport level.

Ograniczanie wyników

2 Central European Journal of Sport Sciences and Medicine

1 Cellular and Molecular Biology Letters

1 Masojc P.

1 Spieszny M.

1 Sroka R.

1 Stihec J.

1 Sumara M.

1 Zubik M.

2 2013

1 2002

The differences in results of preliminary selection in team sports as the premise to define a profile of a "young football player"

The application of molecular markers in the process of selection

Identifying talented handball players - the possibilities of examining the players by means of speed-force and coordination tests