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Naslov portalaDigitalne zbirke NSK
  
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14.680 (1-10)
NaslovBosanski mlin na Brki / Drag. [Dragutin] Renarić.
Impresum[S.l.], 1941.
Materijalni opis1 grafika : bakropis ; otisak 224 x 220 mm, list 433 x 302 mm.
OpisDrvena kuća na stupovima koji vire iz vode. Uokolo drveće
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NaslovOsnove programiranja u R-u : S760 / autori Damir Pintar i Mihaela Vranić.
ImpresumZagreb : Sveučilišni računski centar, 2020.
Materijalni opis1 online jedinica građe (4 MB).
Vrsta publikacijeknjigae-knjiga
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NaslovCan the talk test be used to predict training induced changes in ventilatory threshold? / Kristen M. Deal, Carl Foster, Salvador Jaime, Richard P. Mikat, Kim Radtke, John P. Porcari.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThis study was designed to assess the ability of the Talk Test (TT) to track training-related changes in ventilatory threshold (VT). Thirteen recreational athletes (20.5±1.91 years, males=7) completed two incremental exercise tests (one with respiratory gas exchange and one with the TT) before and after six weeks of self-directed increases in training load. The TT was used to predict VT by assessing the ability to speak comfortably after three-minute exercise stages, based on speech comfort while reciting a 100-word passage. Training load was documented from exercise logs based on session rating of perceived exertion (sRPE) and training duration. Repeated measures ANOVA, with the Tukey’s post-hoc analysis, was used to detect differences between the changes in power output (PO) at the equivocal stage of the Talk Test (EQ) and VT measured by gas exchange (p<.05). Significant mean differences were found between pre- vs. post-training PO and measured VT (116+32.4 vs. 134+32.4 Watts) (p<.05) but not at the EQ stage of the TT (125+40.8 vs. 135+29.8 Watts). The increase in PO at VT (+15.5%) was significantly underestimated by the change in PO at the EQ stage of the TT (+8.0%). The correlation between changes in PO at VT and PO at the EQ stage of the TT was r=0.66, p<.01. However, about 50% of participants did not change their PO at the EQ stage of the TT, so the individual correspondence between TT and measured VT was only moderately strong.
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NaslovHematological variability analysis after road marathon vs ultratrail : predictive factors / María Desamparados Bernat-Adell, Rania Achouak Hafsi, Pablo-Salas Medina, Ana Folch-Ayora, Carlos Hernando-Domingo, Ignacio Martínez-Navarro, Eladio Joaquín Collado-Boira.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThe practice of long- and medium-distance races has exponentially increased the number of participants in recent years. They are carried out under extreme conditions that cause both biochemical and anthropometric changes in athletes and, in addition, have serious risks associated, such as dehydration, thermal disorders, or hypoglycemia. Knowledge regarding alterations at hematological level after this type of effort is limited. The objectives of this pre-post analytical descriptive observational study were: to describe and compare hematological values in amateur runners pre and post road marathon and ultratrail races, and to compare the hematological parameters between the groups in the two times analyzed by means of univariate descriptive statistical analyses, intra-group pre-post comparisons (Wilcoxon Signed-Rank Test), and comparisons between the groups (Mann-Whitney U Test). Effect size was calculated using Cohen’s D. An explanatory model (Multiple Logistic Regression) was created. Statistical significance was set at p<.05. The Wilcoxon test for marathon runners observed significant differences (p≤.001) in the white series. In ultratrail runners, the results were similar, with significant differences (p≤.001) in the platelet series. The Mann-Whitney U test showed the same pre-race hematological conditions for both groups, except for hematocrit and corpuscular values (p≤.001). Significant differences (p≤.001) were also found in the post-race leukocyte and neutrophil values. Significant differences in hematological parameters have been observed both between and within the groups. The differences with greater significance corresponded to the leukocyte series.
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NaslovSitting volleyball players : differences in physical and psychological characteristics between national and league teams / Shirko Ahmadi, Jolanta Marszałek, Gustavo Luiz Gutierrez, Marco Carlos Uchida.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThe aim of the present study was to describe and compare physical profiles and certain psychological aspects of sitting volleyball players in a national team and in a league team. Twenty-seven Brazilian sitting volleyball players (15 from the national team, 12 from the league team) took part in this study. They completed demographics, FANTASTIC, anthropometrics, handgrip, seated chest pass, modified agility T, modified speed and agility, and speed and endurance tests. Data were processed by χ2-test, Mann-Whitney U test, Pearson correlation, and a stepwise multiple linear regression analysis. The national team players had significantly more training time and better lifestyle (p<.01) than the league players. Significant regression equation results for predicting players’ level included weekly training volume and hip circumference (R2=.68). In conclusion, national team and league players differed in just psychological aspects and magnitude training time, which show the importance of psychological characteristics in elite sitting volleyball.
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NaslovHow can xsens kinematic suit add to our understanding of a slalom turn : a case study in laboratory and field conditions / Vjekoslav Cigrovski, Tomislav Rupčić, Ivan Bon, Mateja Očić, Tomislav Krističević.
Materijalni opisIlustr., graf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisTraditionally used methods for kinematic analysis of alpine skiing has limitations regarding data collecting and data processing. Also, analysis of measured parameters, interpretation, and implementation in practice are postponed. Therefore, aim of this paper was to determine differences in the performance of slalom turns between three conditions using a relatively new technology that allows fast data collecting and analysis. Twenty kinematic variables were analysed for each turn (both the left and right) and 26 turns were executed in each condition. All turns were performed by a national skiing demonstrator. Differences were determined by MANOVA (F=71.3; p=.00). Tukey’s post-hoc test showed that the turns performed on the ski simulator differed in every variable from the turns performed in other two condition, and the free skiing turns differed from the corridor turns in the following variables: hip joint angle of abduction of the right leg in the left turn, p=.00; distance of the projection of the centre of mass relative to the right foot in the left turn, p=.00; hip joint angle of flexion of the left leg in the left turn, p=.02; hip joint angle of abduction of the left leg in the left turn, p=.01; distance of the projection of the centre of mass relative to the left foot in the left turn, p=.00; knee angle of flexion of the left leg in the right turn, p=.04). The kinematic parameters obtained using the XSENS suit during slalom turns performed on the ski simulator and ski slope suggested significant differences in the position of the lower extremities, which might be important for situational efficiency and technical performance. Our results can be used to improve the alpine skiing technique. They suggest more precise relations between space parameters, such as body position and the angles between different body segments during a slalom turn.
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NaslovExploring the coach's and athletes' behaviour in martial arts : a case study / Jan-Erik Romar, Markus Ranta-Aho, Emyr Williams.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThis descriptive study examined the processes of coaching and participation in Brazilian jiu-jitsu (BJJ) for both experienced (n=3) and novice (n=3) adult participant, members of a martial arts club in Finland. Over a period of six weeks, five practice sessions were videotaped with a mean duration of 84.35 minutes. Systematic observation data were used to describe the practice structure and participants’ engagement. Additionally, a modified version of the Coach Analysis and Intervention System was used to evaluate coaching behaviour. The heart rate data were also collected to evaluate the participants’ physical activity levels. Results indicated that practice time allocated to training and playing were 75% and 25%, respectively, which differs from team sport research. The coaching emphasis observed in this study highlighted competition and technique perfection. The participants’ practice activity level was high with most participants spending more than half of practice time at a moderate-to-vigorous physical activity level. These findings show that both the structure and content of coaching practice is context specific and that the coach need to identify and react to the needs of individual athletes.
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NaslovThe relationship among repeated sprint and change of direction abilities in football players with cerebral palsy / Matías Javier Henríquez, Marco Kokaly, Felipe Herrera, Raul Reina.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThis study aimed to describe and determine relationships between repeated sprint and change of direction (COD) abilities in football players with cerebral palsy according to four sport classes (FT5 to FT8). Seventeen male football players with cerebral palsy took part in this study (23.0±4.7 years, 65.9±9.5 kg, 168.8±5.9 cm). The repeated sprint ability (6×40-m sprints with a 20-second recovery) was evaluated to determine the best sprint time, mean sprint time, and percentage of sprint decrement. The difference in lactate concentration was determined using blood samples taken three minutes before and after testing. The Illinois Agility Test (IAT) was also used to assess players’ change of direction ability. The FT8 players had better performance (p<.01) in the best sprint time, mean sprint time and in the IAT scores compared to the players of the sport classes FT5/6. Players of the sport class FT7 also reached higher performance in the IAT compared to the players of the sport classes FT5/6 (p<.05). A significant correlation was found between the best sprint time and mean sprint time (r=.94, p<.01), the best sprint time and the IAT (r=.62, p<.01), and between the best sprint time and the difference in lactate concentration (r=-.51, p<.05). The relationships between repeated sprint and change of direction abilities demonstrate the performance profile of para-footballers with cerebral palsy in those variables according to their sport classes, exhibiting lower performance than the values reported for regular football players.
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NaslovSex and standard levels differences in anthropometric and physical fitness characteristics in youth handball players / Manuel Ortega-Becerra, Fernando Pareja-Blanco.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisThis study analyzed the relationships between throwing velocity and anthropometric and fitness parameters in young female and male handball players of different ages. A total of 159 players participated: females under-16 (FU16, n=44) and under-14 (FU14, n=21); males under-16 (MU16, n=54) and under-14 (MU14, n=40). The following was measured: body height, arm span, body mass, total finger span, hand length, maximal isometric handgrip force, handball throwing velocity, 20-m sprints, countermovement jump, and change of direction. Group MU16 showed significantly (p<.05) greater values of anthropometric characteristics than groups FU16 and MU14. No significant differences were observed between FU14 and MU14 in any of the anthropometric variables analyzed, or between the two female groups (FU16 vs. FU14). MU16 showed significantly (p<.05) better performance in all fitness parameters than FU16 and MU14. No significant differences were observed between FU14 and MU14 or between FU16 and FU14. Throwing performance correlated (p<.05) with almost all the anthropometric and fitness parameters evaluated within each group. Taken together, male handball players showed greater anthropometric and fitness characteristics in the U16 compared to the U14, whereas no substantial differences were observed in female handball players between the two groups. Handball throwing velocity is associated with body and hand dimensions and other physical performance parameters.
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NaslovMatching of personality traits, emotional intelligence and social skills among dance partners in competitive dancing / Tina Šifrar, Kim Majoranc, Tanja Kajtna.
Materijalni opisGraf. prikazi.
Način izrade datotekeizvorno digitalna građa
Vrstačlanak
OpisWe investigated whether there was more matching in personality traits, emotional intelligence, and social skills in better performing dance couples than in their less successful counterparts and if better- and lower-performing dancers individually have more equivalent personality traits, emotional intelligence, and social skills. Twenty-four dance couples (i.e. 24 male and 24 female dancers), performing both the Latin and standard dances at a competitive level, were included in the study. Among the measured metrics were: personality traits (using the Big Five Questionnaire), social skills (using the Interpersonal Skills Questionnaire), and emotional intelligence (using the Emotional Competence Questionnaire). When comparing differences between couples, results showed that the better dance couples were more orderly, agreeable and conscientious than the lower-performing dance couples who seemed to be more open. When comparing differences between individual dancers, results showed that the better-performing dancers tended to be older, more experienced, with a higher “competitive mileage” and better-trained bodies, more diligent with a firm belief in their success, confident in attaining their goals, and more motivated. They were also more emotionally stable – a trait that stemmed from their maturity and many years of competing. Findings obtained by our study will certainly allow us to view competitive dancers from a different, as yet undiscovered and potentially deeper viewpoint of psychology. One of the practical aspects of our research lies in understanding how to keep dance couples together for a longer time, allowing dancers to perform in unison for longer periods than would be otherwise possible.
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