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Changes of Lactate Threshold during a Half-Year Training Cycle in "Arka Gdynia" Football Players

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Ignatiuk W., Rompa P., Radzimiński Ł., Dargiewicz R., Jastrzębski Z.
Baltic Journal of Health and Physical Activity
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2010
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vol. 2
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issue 2
104-112
EN
Background: The aim of this study was to assess lactate threshold changes during a half-year training cycle in S.S.A. "Arka Gdynia" football team.Material/Methods: The research was conducted on a sample of 17 "Arka Gdynia" Football Club players. The subjects participated in premier league competitions in autumn 2009/10 season. Apart from league matches (17) the players took part in Remes Polish Cup (2 matches). Aerobic capacity tests were conducted at the beginning of the summer preparatory season (test 1 - 27th June 2009), during the competitive season (test 2 - 2nd September 2009) and at the beginning of the winter preparatory season (test 3 - 13th January 2010). The players underwent an incremental running test. Running speed (V/LT) and heart rate (HR/LT) at the lactate threshold were determined.Results: An analysis of mean running speed values at LT intensity in each study confirms that during the first two tests participants achieved the same mean value of the ratio V/LT (3.80 m/s). The last test revealed a regression of the results by 0.17 m/s. The lowest standard deviation (± 0.20 m/s) was observed in the first study, which indicates that the diversity of the group was the smallest.Conclusions: Goalkeepers achieved statistically lower (p<0.05) values of running speed at the intensity corresponding to the anaerobic threshold (V/LT) in relation to field players.
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INFLUENCE OF DIFFERENT TYPES OF SURFACES ON THE RESULTS OF RUNNING SPEED TESTS IN YOUNG SOCCER PLAYERS

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Jastrzębski Z., Bichowska M., Rompa P., Radzimiński Ł., Dargiewicz R.
Central European Journal of Sport Sciences and Medicine
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2014
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vol. 5
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issue 1
5-14
EN
The main purpose of this study was to determine the influence of different types of surfaces on the sprint test results. 33 male football players from two age categories - U15 and U18 - performed sprint tests (7 distances between 5 and 30m) and a 150m shuttle run test on three types of surfaces: natural grass [n], a synthetic surface [s] and a rubber surface [r]. The longer distance a player covers, the more likely it is that the importance of the type of running surface will be noticed. The rubber surface diminishes the negative effects of changeable factors on the reliability of the tests and therefore, in our opinion, is recommended for control tests and especially for longitudinal tests. Comparing the results of running speed tests performed on different surfaces and especially in different weather conditions is unjustified.
3
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An Application of Incremental Running Test Results to Train Professional Soccer Players

100%
Radzimiński Ł., Rompa P., Dargiewicz R., Ignatiuk W., Jastrzębski Z.
Baltic Journal of Health and Physical Activity
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2010
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vol. 2
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issue 1
67-74
EN
Background: The aim of this study was to lay out an incremental running test to determine anaerobic threshold and its usefulness as a predictability factor of the physiological load on professional soccer players during soccer training activities.Material/Methods: Subjects performed multi-stage incremental running test at three time points throughout the soccer season on a synthetic soccer pitch to determine the lactate threshold. The initial speed was set at 2.8 m/s and increased by 0.4 m/s after each stage until termination. HR was recorded at 5-second intervals by the Polar heart rate monitor (Polar Electro, FIN) at the end of each 3.30 - 5 min running stage. A capillary blood sample was taken from the fingertip during 1 minute rest between stages. Blood lactate concentration from each sample was assigned to the corresponding values of the heart rate and the running speed. Beaver method was used to determine the lactate threshold (LT) and the corresponding values of HR (HR/LT) and the running speed (V/LT). According to V/LT and HR/LT players were assigned to running and training groups for optimal individualization of the training process. Players performed some training activities like running or small-sided games in those groups.Results: The velocity at LT in the first test was 3.61 ± 0.22 m/s and increased during the preparation period (Test 2 - 3.79 ± 0.21 m/s). A further increment was observed during the soccer season. HR/LT was 173.90 ± 7 bpm in the first test and decreased after preseason preparations to 168.58 ± 6.78 bpm. During the soccer season no significant changes were observed.Conclusions: In this study we have observed that aerobic fitness increased during the preparation period and a further increment was observed after the competitive season. The present study shows V/LT and HR/LT as useful indicators for programming and monitoring training loads.
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Lactate Threshold Changes in Soccer Players during the Preparation Period

86%
Jastrzębski Z., Dargiewicz R., Ignatiuk W., Radzimiński Ł., Rompa P., Konieczna A.
Baltic Journal of Health and Physical Activity
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2011
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vol. 3
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issue 2
96-104
EN
Background: The aim of the study was to assess the anaerobic threshold (lactate threshold LT) changes during winter and summer preparation period in soccer premier league and first division players. It was assumed that the index value varies depending on the stage of a one-year training cycle.Material/Methods: Tests were conducted on the premier league and first division soccer players. Physical capacity tests were carried out at the beginning and at the end of the winter and summer preparation period. The tests covered 3 years: 2008 - 2010. Subjects performed an incremental running test according to Jastrzębski's method. The most important data obtained from this test are: running speed (V/LT) and heart rate (HR/LT) at LT.Results: At the beginning of summer preparations the players' speed corresponding to LT reached the value of 3.69 m/s ± 0.31 m/s, while at the end of this period it increased to 3.86 m/s ± 0.29 m/s. During the winter preparatory season the values of this index were 3.81 m/s ± 0.3 m/s and 3.80 m/s ± 0.21 m/s, respectively.Conclusions: Tested subjects showed lower values of running speed at LT level at the beginning of the summer preparatory season than at its end. At the final stage of the winter preparatory season HR values at LT were significantly lower than at the initial stage of this period.
5
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Generic versus specific sprint training in young soccer players

86%
Jastrzebski Z., Radziminski L., Dargiewicz R., Jaskulska E., Barnat W., Rompa P.
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EN
Background: The aim of this study was to examine the effect of two 8-week sprint training programs on the speed and sport-specific skills of young soccer players and to determine additional effects of 8 weeks’ whole body rotation. Material/Methods: Twenty-two Under-18 soccer players were divided into two groups: a running group (RG) and a ball group (BG). The RG completed sprint training without the ball, whereas the BG members trained with the ball. The 5-, 10-, 15-, 20- and 30-m sprint times and the level of soccer-specific skills were measured before and after completing the training programs. Results: A significant (p < 0.05) time interaction was found in sprint times at all distances. The players from both groups achieved significantly better sprint times on the distances of 15 m and 30 m; additionally, an improvement in the 20 m sprint time was noted in the BG. No significant changes in the level of soccer-specific skills were found. Conclusions: Sprint training performed with a ball might be equally efficient as a traditional non-ball method for developing players’ speed. Moreover, soccer-specific sprint training may improve certain technical skills in young players.
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