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1

Analysis of motor performance of professional soccer players in different environmental conditions

100%
Konefal M., Chmura P., Andrzejewski M., Chmura J.
Trends in Sport Sciences
|
2014
|
tom 21
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nr 4
Introduction. Air temperature and humidity affect the motor activity of soccer players during matches. Analysis of soccer players’ motor activity in extreme environmental conditions enables optimal players’ preparation. Aim of Study. The study aims to assess changes in motor performance of soccer players in different environmental conditions. Material and Methods. The participants were soccer players taking part in the 2014 World Cup matches in Brazil. The authors used the Castrol Performance Index motion analysis system for data recording. Results. Higher air temperature reduces the performance of exercise with medium (p ≤ 0.05) and high intensity (p ≤ 0.01); while higher humidity has a significant positive impact on the distance covered by players with medium intensity (p ≤ 0.05). The total number of performed sprints becomes significantly lower in higher air temperature and humidity (p ≤ 0,05). Conclusions. Soccer training should emphasize highintensity exercise as well as short-lasting and explosive exercise since the environmental conditions have a greater impact on players’ speed skills than endurance skills.
2

The impact of players’ motor skills on match performance in top German Bundesliga teams

88%
Konefal M., Chmura P., Kowalczuk E., Andrzejewski M., Chmura J.
Trends in Sport Sciences
|
2015
|
tom 22
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nr 4
Introduction. Soccer is a highly dynamic and acyclical game and a soccer player’s performance during a match involves a high variability of actions since. Aim of Study. The aim of the present study was to determine the effects of endurance and speed skills of players from two top German Bundesliga teams on their teams’ final standings in the league table. Material and Methods. The study covered all 34 matches of the 2013/2014 season, and it consisted of 480 observations of 41 players. It was carried out using the Impire AG motion analysis system on the basis of official Deutscher Fußball-Bund (DFB) match reports. The players’ endurance skills were estimated on the basis of total distance covered during match play and distances in different intensity ranges. The players’ speed skills were assessed on the basis of the total number of performed sprints, sprinting distance, and maximal and mean running speed. Results. The results showed that the team which was ranked lower in the final league table scored higher in all players’ motor parameters than the team which was ranked higher. Conclusions. Pre-season motor preparation of top German Bundesliga teams is not the decisive determinant of the teams’ final standings in the league, and even the highest level of players’ skills does not guarantee reaching the championship position.
3
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Analysis of match performance of full-backs from selected European soccer leagues

88%
Konefal M., Chmura P., Andrzejewski M., Pukszta D., Chmura J.
Central European Journal of Sport Sciences and Medicine
|
2015
|
tom 11
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nr 3
4
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Distance covered below and above the anaerobic threshold by elite German goalkeepers

76%
Parus P., Chmura P., Konefal M., Andrzejewski M., Kowalczuk E., Chmura D.
Central European Journal of Sport Sciences and Medicine
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2017
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tom 17
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nr 1
5

Endurance skills of young team game players

76%
Chmura P., Swierzko K., Andrzejewska J., Popowczak M., Dudkowski A., Konefal M., Rokita A.
Baltic Journal of Health and Physical Activity. The Journal of Gdansk University of Physical Education and Sport
|
2015
|
tom 07
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nr 3
Background: The aim of the present study was to assess physiological-biochemical reactions to incremental exercise loads and the levels and development of endurance skills in young male and female team game players. Material/Methods: The study sample comprised 370 soccer, handball, basketball and volleyball players (186 girls and 184 boys) from the Lower Silesian Regional Teams in Poland, aged 14.20 ±1.37 years (boys) and 13.90 ±1.15 years (girls). The exercise test consisted ofthe shuttle run Beep Test for estimation of aerobic fitness. The assessment of endurance skills was based on the length of the covered distance in the Beep Test as well as on measurements of the heart rate (physiological) and blood lactate concentration (metabolic). Results: Among the four studied groups of players a statistically significant improvement in endurance skills was noted in male volleyball players (p ≤ 0.05). Conclusions: Significantly higher levels of endurance skills in young male handball, basketball and volleyball players and in female volleyball players who remained on the regional teams for two consecutive years may be an indication of the players’ proper selection and training. Significant changes in blood lactate concentration in young players, revealed in both cross-sectional and continuous studies, were only noted in male volleyball players. Significant decreases in the heart rate in the cross-sectional study was found only in male handball and basketball players and in female basketball players, whereas in the continuous study only in male handball players. An assessment of young players’ physiological-biochemical reactions on the basis of exercise test results can effectively enhance the optimization of training loads.
6

Endurance capacity and selected technical-tactical skills of soccer players participating in the group stage of the 2014 FIFA World Cup

76%
Chmura P., Golinski D., Andrzejewski M., Mroczek D., Kawczynski A., Rokita A., Chmura J.
Trends in Sport Sciences
|
2014
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tom 21
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nr 3
The study examines the endurance capacity and selected technical-tactical skills of soccer players participating in the 2014 World Cup in Brazil. The results indicate the significant impact of players’ motor preparation level on the execution of technical-tactical actions in top-class soccer tournaments. The covered distance by players during a match is one of the most important indices used for assessment of players’ endurance capacity. The analysis revealed that the Spain and Italy national teams which attained very high passing efficiency and total number of passes failed to advance to the knockout stage of the tournament. The analysis of the structure of match performance, especially by elite teams, is necessary for rational programming of endurance training in professional soccer. The knowledge of endurance loads at top-level soccer tournament permits the optimalization of modern soccer training.
7
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Distances covered above and below the anaerobic threshold by professional football players in different competitive conditions

76%
Chmura P., Konefal M., Kowalczuk E., Andrzejewski M., Rokita A., Chmura J.
Central European Journal of Sport Sciences and Medicine
|
2015
|
tom 10
|
nr 2
In modern endurance training information about an athlete’s performance below and above the anaerobic threshold is crucial. The aim of the present study was a comparative analysis of the total distance covered by football players in two rounds of the 2013/1014 playing season. Furthermore, the study also assessed the performance of elite Bundesliga players during competitive matches, above and below the running speed of 4 m·s–1, corresponding to the level of anaerobic threshold (AT). The players’ mean body height was 183.00 ±6.44 cm, body mass 78.19 ±7.42 kg, and mean age was 27.99 ±3.47 years. The analysis was carried using the Impire AG motion analysis system on the basis of official match reports from the Deutscher Fußball-Bund (DFB). The study revealed that the total distance covered by the players in match-play was significantly shorter in the second round of the playing season. The distance covered by the players below the AT is significantly shorter in the spring round than in the autumn round, while the distance covered above the AT shows a reverse, although non-significant tendency. In the spring round the volume of players’ work performed above the anaerobic threshold is greater than the volume of exercise performed below the AT.
8
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The effects of a six-week plyometric training program on the stiffness of anterior and posterior muscles of the lower leg in male volleyball players

64%
Mroczek D., Superlak E., Seweryniak T., Mackala K., Konefal M., Chmura P., Borzucka D., Rektor Z., Chmura J.
Central European Journal of Sport Sciences and Medicine
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2017
|
tom 20
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nr 4
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