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Association of the ACTN3 R577X polymorphism in Polish rowers

100%

Jastrzebski Z. , Leonska-Duniec A. , Kolbowicz M. , Tomiak T.

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tom 06

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nr 3

EN

Background: The ACTN3 R577X polymorphism has been associated with an elite athlete status. Several studies have determined that the R allele is connected with power-oriented athletic performance, whereas the nonfunctional XX genotype may give some beneficial effect for endurance performance. The main aim of the study was to determine the possible interaction between the ACTN3 R577X polymorphism and an endurance athlete status in a group of Polish rowers in comparison with sedentary individuals. Material/Methods: 121 male Polish rowers, members of academic sports clubs, and 115 unrelated volunteers were recruited for the study. Genotyping for the R577X variant was performed by PCR–RFLP. Results: The genotype distribution amongst the rowers (52.06% RR, 38.85% RX, 9.09% XX) was significantly different from that amongst sedentary individuals (RR-33.5%; RX- 49.60%; XX-17,35%; P = 0.024). A significant excess of the R allele was noted in the rowers (71.48%, P = 0.008) when comparing with the controls (60.0%). Conclusions: The obtained results show that the ACTN3 X allele and XX genotype are underrepresented in Polish rowers and they are not advantageous for the endurance-type athletes in the studied population. On the contrary, the R allele seems to be useful for a top-level rower. However, additional studies are needed to clarify this problem.

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The angiotensin converting enzyme gene I/D polymorphism in Polish rowers

100%

Jastrzebski Z. , Leonska-Duniec A. , Kolbowicz M. , Tomiak T.

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tom 05

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nr 1

EN

Angiotensin converting enzyme gene (ACE) is the most frequently investigated genetic marker in the context of genetic conditioning of athletic predispositions. The product of the gene is a key component of the renin-angiotensin system (RAS) and the kallikrein-kinin system (KKS), mainly responsible for the regulation of blood pressure. The main aim of the study was to determine the possible interaction between the ACE l/D polymorphism and endurance athlete status in a group of Polish rowers in comparison with sedentary individuals. 121 male Polish rowers, members of academic sports clubs, and 115 unrelated volunteers, were recruited for the study. The PCR amplification of the insertion (I) or deletion (D) fragment of the ACEgene was performed. Compared with control group, the frequency of the I allele differ significantly from that found in rowers (57.4% vs. 44.3%; P = 0.013) and the ACE genotype frequency amongst the whole cohort of rowers (30.6% II, 53.7% ID, 15.7% DD) was also different from expected values (control group 19.1% II, 50.4% ID, 30.4% DD; P=0.017). Our investigation confirms a positive association of the I allele of the ACE gene with endurance athlete status in a group of Polish rowers.

3

Effects of 8-week intermittent whole body vibration combined with sub-maximal resistance training on strength capacities in health-related training of young females

75%

Eider J. , Mishchenko V. , Tomiak T. , Sawczyn S. , Kuehne T. , Zasada M.

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nr 6

EN

The authors recently were shown some positive effects of controlled whole body vibration (WBV) as an exercise modality. The purpose of the present study consists of revealing chronic effects (8 weeks) of intermittent whole body rotation vibration combined with sub-maximal static and dynamic resistance physical exercises on strength capacities of young females in health-related training. Thirty-seven healthy females 20-25 years old were randomized into two groups (experimental and control). Results showed the positive effects of dose using rotation whole body vibration in sub-maximal resistance physical exercises upon some characteristics of isometric, isokinetic strength, jumping power, and strength endurance for 24 sessions of training. The 8-week program of young female sub-maximal resistance training combined with intermittent WBV appeared more efficient than the same content of conventional resistance training without WBV. Increasing strength capacities took place first of all during the first 4 weeks of training and was more essential in hand isokinetic and in isokinetic leg and jumping capacities than in isometric leg strengths. There was no significant increase of strength endurance in vibration group in comparison with the conventional training group.

4

Type of education and life experiences in the dual career

75%

Graczyk M. , Nawrocka A. , Wylleman P. , Moska W. , Tomiak T. , Lachowicz M. , Drobnik P.

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tom 10

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nr 4

EN

Background: ‪The objective of this study was to check whether the type of education is related to the development of a dual career in professional sport. Material and methods: ‪This study used the Chi-square test of independence and Student’s t test to analyze 7 scenarios (not experienced and experienced) presented to the participants. A final survey-list, consisting of 38 items of competences (possession and importance) and completed by 243 young people: 218 (89.7%) athletes obtaining secondary education and 25 (10.3%) obtaining or having higher education. Results: ‪There were statistically significant differences between people with higher education and secondary education in terms of possessed competences, but there were no statistically significant differences between higher education and secondary education in terms of the importance of competences. There were statistically significant differences between people with secondary education and people with higher education in experiencing scenario 1 and 5. Conclusions: ‪The results of both studies confirmed three hypotheses. It turned out that the level of education is related to the course of athletes’ dual career. Of particular importance are the athletes’ social competences and life experience.

5

Cyclic movement execution and its influence on motor programmess

63%

Dornowski M. , Gorkovenko A. , Tomiak T. , Mishchenko V. S. , Wilczynska D. , Olszewski H. , Sawicki P. , Talnov A. N.

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2019

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tom 26

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nr 2