No abstract

In the sport performance structure of table tennis is sensor motor reaction time one of the most important factors for reaching top-level results, both in males and females groups. In this research we watched 23 female table tennis players from Slovakia; 9 mini cadets (12-13 years), 6 cadets (14-15 years) and 8 juniors (16-18 years). Girls were tested by modified agility test for table tennis players (Vacenovsky & Vencurik, 2013) with machine FITRO Agility check. Thus we gained their sensor motor reaction times. By Mann-Whitney U-test we studied differences between age categories, upper and lower extremities, dominant (forehand) and un-dominant (backhand) side, right and left-handed players. We used significance level p<0.05. In our research we did not confirm expected results that the older groups have shorter sensor motor reaction time. We also expected shorter reaction time of upper extremities comparing lower extremities; this was confirmed, though there was found statistical significant difference only in juniors group. Groups of mini-cadets and cadets have better (shorter) sensor motor reaction time from backhand side, while group of junior is better from forehand side. We also confirmed that left-handed players have slightly shorter reaction time.

Anumber of youth movement activities, e.g. running, walking, jumping, climbing trees, throw-ing and catching a ball, has been on a decline in the current European cultural space. The results of this research contribute to broadening the knowledge about the level of basic motor competencies and qualifications of the 1st and 2nd grade elementary children in the Slovak Republic. The primary data on the basic motor competencies and qualifications of the examined group (n=307, age = 7.58 ± 0.69 years) were collected by means of the MOBAK 1‒2 test battery (Herrmann et al., 2018b). The significance of differences between boys (n=156, age 7.62 ± 0.69) and girls (n=151, age 7.55 ± 0.70) was evaluated by Student’s t-test in two independent groups. The boys in the first grade (n = 97) achieved a significantly better performance in basic motor competency object movements (x = 5.17 ± 1.79 points) than their female peers (n=88, x = 3.52 ± 1.78). The girls in the second grade did not achieve a statistically better performance in the movement qualifications in throwing, balancing and rolling than the first-graders of the same gender. Knowledge of the level of basic motor com-petencies and qualifications of the Slovak elementary school children allows the national and European educational and cultural authorities to design and improve the content of physical and sport education classes.

El objetivo del estudio fue contrastar la veracidad de las siguientes creencias: 1-El entrenamiento de fuerza y resistencia es incompatible. 2-El entrenamiento de fuerza limita la flexibilidad. 3-Las rutinas divididas son más eficaces que las de cuerpo entero. 4-El entrenamiento de fuerza no es útil para la pérdida de peso, o la mejora de la composición corporal. Se realizó una búsqueda en las siguientes bases de datos: ProQuest, Google Scholar, Scopus, ScienceDirect y Web of Science. Los criterios de selección fueron: a) Artículos escritos en Español o en Inglés. b) Investigaciones primarias con metodología experimental o cuasi-experimental. c) Escritos entre el año 2015 y 2019, salvo para los apartados 2 y 3, que se amplió hasta 2000 y 1990 respectivamente, debido a la escasez de publicaciones. d) La población objeto de estudio fueron adultos sanos que no practicaban deporte a nivel profesional o semiprofesional. e) Artículos que recogen exclusivamente adaptaciones logradas mediante una intervención con entrenamiento. Analizados los estudios, se pudo determinar que en adultos sanos: 1- El entrenamiento de fuerza y resistencia es compatible. 2- El entrenamiento de fuerza no deteriora la flexibilidad, y podría incluso mejorarla. 3- En virtud de los estudios existente, las rutinas divididas y las de cuerpo entero son igualmente eficaces para incrementar la fuerza. Las rutinas de cuerpo entero podrían generar mayor hipertrofia muscular. 4- El entrenamiento de fuerza es eficaz en la mejora de la composición corporal, y podría tener un impacto positivo en biomarcadores cardiovasculares y metabólicos.Abstract. The purpose of the study was to verify the veracity of the following beliefs: 1-Resistance and endurance training are incompatible. 2-Resistance training reduces flexibility. 3-Split body routines are more effective than full-body routines. 4-Resistance training is not useful neither in weight loss programs, nor to change body composition. The following databases were searched: ProQuest, Google Scholar, Scopus, ScienceDirect and Web of Science. The selection criteria were: a) Articles written in Spanish or in English b) Primary research following an experimental or quasi-experimental methodology c) Written between 2015 and 2019, except for section 2 and 3, which was extended until 2000 and 1990 respectively, due to the shortage of publications d) The target population of study were healthy adults who did not practice sports at the professional or semi-professional level e) Papers which include only adaptations achieved through training interventions. Once the studies were analyzed, it was concluded that in healthy adults: 1-The combination of resistance and endurance training is compatible. 2- Strength training does not decrease flexibility, and it could even improve it. 3- On the basis of existing studies, split and full-body routines are equally effective in improving strength. Full-body routines could generate higher muscle hypertrophy. 4- Strength training is effective in improving body composition, and could make a positive impact on cardiovascular and metabolic biomarkers.

Purpose: Change of direction speed (CODS) and reactive agility (RAG) are important qual-ities in futsal, but studies rarely examined the predictors of these conditioning capacities in players of advanced level. This study aimed to evaluate predictive validity of certain an-thropometric and conditioning capacities in evaluation of futsal specific CODS and RAG in top-level players. Methods: The sample comprised 54 male players from Croatia and Bosnia and Herzegovina, members of teams competing at the highest national rank, including national champions for the 2017–2018 competitive season in both countries. The variables comprised set of pre-dictors (body mass, body height, triceps skinfold, reactive strength index [RSI], sprint 10 m [S10M], and broad jump [BJ]; and four criteria: futsal specific CODS and RAG, performed with and without dribbling (CODS_D, CODS_WD, RAG_D, RAG_WD). To identify the asso-ciation between variables Pearson’s correlation and multiple regressions were calculated. Results: Observed predictors explained statistically significant (p < 0.05) percentage of vari-ance for all four criteria (Rsq: 0.28, 0.30, 0.23 and 0.25, for CODS_WD, CODS_D, RAG_WD, RAG_D, respectively). Body mass was significant predictor for all criteria (Beta: 0.35–0.51), with poorer performances in heavier players. In both performances which involved dribbling, significant predictors was RSI (Beta: −0.27 and −0.31 for CODS_D and RAG_D, respective-ly), with superior performances in players with better RSI. The S10M and BJ were not identi-fied as being significantly correlated to studied RAG and CODS performances. Conclusion: Study confirmed specific influence of studied predictors of futsal specific CODS and RAG with consistent negative influence of body mass on studied performances. Almost certainly this can be explained by specifics of RAG and CODS execution. Specifically, tests are performed over relatively small distances, with several changes of direction, which clear-ly mimic the futsal specific performances. Although sprint performance is often observed as important determinant of CODS and RAG, herein we did not confirm its predictive validity in explanation of futsal specific CODS and RAG. Future studies should evaluate other poten-tially important predictors of these capacities in futsal.