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<jats:p>The aim of this research is to study the ball throwing velocity at different phases of teaching handball elements to female students in their first year of study at Faculty of Kinesiology, Zagreb. The set of variables contains three throwing velocity tests: 1. handball throwing velocity from the standing position (ST), 2. basic shot throwing velocity (RT) and 3. jump shot throwing velocity (JT). The speed of the ball was estimated by a radar gun (Stalker ATS) three times for each shooting type and it was expressed in km/h unit. Measuring was conducted twice in the course of the summer semester of the academic year 2017/2018. The first measuring was carried out after the first lesson and the second one a month later. The average throwing velocities recorded during the first measuring were: ST - 59.25 km/h, RT - 61.60 km/h and JT 61.62 km/h. On the following occasion, the average results were: 59.36 km/h (ST), 61.33 km/h (RT) and 61.33 km/h (JT). No statistically significant differences in the observed set of variables were found by using the t-test for the dependent samples on either occasion. The obtained results can be interpreted in regard to the methods of directing and evaluating the teaching process, as well as in regard to an effective program for improving explosive throwing power.</jats:p>

<jats:p>Aim of this research was to identify and analyse relative age effect (RAE) on sample composed of young Croatian taekwondo competitors. In order with aim of research, for medal winners (n1=72) and other competitors (n2=187) who competed at Croatian taekwondo cadet championship 2015, date of birth, weight category and sport success were extracted. By conducting of Chi-square test on all competitors (n=259) it is proven there is non-significant difference (χ2=12.28; p=0.34) between expected and observed frequencies according to month of birth. Furthermore, significant difference between observed and expected frequencies according to year of birth of medal winners (χ2=45.31; p&lt;0.01) is confirmed. Results of this research are pointing on presence of RAE which could lead to mistakes in selection of young athletes. Authors are suggesting to minimize allowed age range for competition, or to separate competitors in more age categories, which would enable more equal competitions and reduce effect of age on sport success.</jats:p>

<jats:p>The health of a society is conditioned by healthy lifestyle choices. A significant role in shaping health-related behaviour is played by university students, who should be leaders in the scope of health in the future. Our aim was to determine the intensity of physical activities and their relation with the intensity of health-related behaviours of university students of selected majors. Our research covered 372 students of physical education (292) and social sciences (108) from Poznań and Szczecin. We applied Minnesota Leisure Time Physical Activity Questionnaire (MLTPAQ) and Health Behaviour Inventory (HBI). The relations between the level of physical activity (PA) and the health behaviour of the students were determined by intra-group correlations (r). The value of p&lt;0.05 was adopted as statistically significant. Physical education (PE) and public health (PH) students showed higher levels of PA and health behaviour as compared to the students of social sciences (SS). The total activity metabolic index (AMI) indicated a lower level of PA among women, regardless of major. PA [4; 6) MET of tourism and recreation (T&amp;R) students was highly and positively correlated with preventive behaviours (PB) (r=0.69). PA &lt;4 MET of female T&amp;R students and male PE students positively correlated with correct eating habits (CEH). We found negative correlations between PA ≥6 MET of female PE students and male PH students [4-6) and ≥6 MET and health practices (HP), as well as PA [4-6 MET) of male PE students and positive mental attitude (PMA). Positive and negative correlations between free-time physical activity and health-related behaviours indicate the need for regular physical and health education of students. Physical activity, correct eating habits and preventive behaviour of students will increase their chances of promoting a healthy lifestyle in society.</jats:p>

<jats:p>The purpose of the study was to compare BDNF in saliva before and after a maximum physical effort in adolescents practicing sports and their non-training peers, related to the body composition and physical fitness. The study comprised 64 individuals aged 13-14 (39 practicing sports). Physical fitness was measured using the EUROFIT test. The maximum oxygen uptake was determined on a mechanical treadmill. Saliva BDNF concentration was measured (R&amp;D, USA) at rest and after an exercise. The research results prove that body composition was different depending on the sex, the EUROFIT results were not. The percentage of body fat correlated negatively with the strength of the lower body and the strength of the trunk muscles. There was a positive relationship between the muscle mass and the cardiorespiratory fitness, regardless of the level of training. BDNF in saliva was comparable in non-training and training individuals. BDNF was significantly dependent on the body composition only in girls and negatively correlated with the content of adipose tissue. Training and non-training teenagers did not differ in fitness, but in the level of cardiorespiratory fitness. Non-training teenagers showed a higher concentration of BDNF in saliva and further increase after the exercise stress test. In the training individuals, the exercise stress test did not lead to an increase in BDNF concentration.</jats:p>

<jats:p>The aim of this study has been to determine the relationship between the shape of the thoracic kyphosis, lumbar lordosis and sagittal trunk inclination, and the longitudinal and transverse arches of the feet, the position of the hallux and the fifth toe in women with normal and excessive body weight. Material and methods: Eighty nine women aged from 57 to 84 were studied. The shape of the spine was examined using the Zebris pointer ultrasound system, and the shape of feet was evaluated with a podoscope with a 3D scanner. The data analysis was performed using the Statistica v13 software, frequency tables, descriptive statistics, the Kruskal-Wallis test, the post hoc Tukey test, and Spearman’s rank-order correlations coefficient. Obesity has been reported to increase thoracic kyphosis, increase the forward lean of the trunk and flatten the longitudinal arch of the feet. It was found that there is a relationship between the forward lean of the body and the reduction in the longitudinal and transverse arch of the feet and the valgus position of the hallux, and between the degree of thoracic kyphosis and the valgus position of the hallux. Excess body weight, to a greater extent than age, influences the position of the trunk and the shape of feet in older women. A feature of the body posture that is characteristic of older women is the progression of thoracic kyphosis and lumbar lordosis, the forward lean of the body and the lowering of the arch of the feet.</jats:p>

<jats:p>The intention of this study was to find out if external focus of attention, steering the archers’ focus on distal movement effects, will provide better shooting accuracy expressed as higher number of 10 points and higher overall result. The subject sample was consisted of 10 elite male archers, with average age 25.8 years. The sample of variables was derived from observed characteristics of entities in different shooting conditions. A measure of arrow distance from the center of the target face was used in order to estimate shooting precision. The testing consisted of three different shooting conditions: C1- free focus of attention, C2 – internal focus of attention and C3 – external focus of attention. The analysis showed that the highest results were obtained in condition of externally oriented focus of attention (C3), and the lowest results in condition of internally oriented focus of attention (C2). Friedman’s ANOVA did not show statistical differences between the conditions, but they were found between C2 and C3 in afterwards administered Wilcoxon’s test (p=0.047).</jats:p>

<jats:p>The goal of this paper is to examine the state of current research and the interests of researchers all over the world regarding the relationship between physical activity and psychophysical wellbeing (mental and physical health) of children with various types of disability in the context of physical activity in the family. A systematic literature research was conducted using the Cochrane Library, EBSCO, PsycInfo and PubMed databases. Available research articles published between 2010–2020 were searched for using the following keywords: motor disability, physical activity, child with motor disability, physical activity and disability, disabled child, psychophysical well-being, family, physical activity in the family. The goal was to find studies concerning children and adolescents aged 0–19 whose main disability was a motor disability. The available literature describes the positive influence of physical activity on children with cerebral palsy, motor deficits, and neurodevelopmental disorders. In the last decade (2010–2020) levels of intensity of physical activity have been measured with accelerometry using wearable equipment such as ActivHearts, ActiGraph and StepWatch, as well as the MVPA index. Physical activity is beneficial for children with different types and levels of disability, and it influences their families. It is necessary to support, promote, and educate families as well as their children with disabilities about physical activity.</jats:p>

<jats:p>Teaching football should not be focused exclusively on students’ physical or locomotor skills, it should also develop their thinking processes. This fact comes as a result of cooperation of football players during a match, which requires anticipation and making right decisions. The process of intellectual training is often outlined by coaches, but in a regular training it is often not discussed in detail, since not many studies confirmed its importance. In the paper the level of thinking of players during cooperation in scoring a goal was discussed as well as modeling of the game using means of intellectual training. The observation of player cooperation included the analysis of 141 goals scored in 76 randomly selected football matches in UEFA Champions League from 2005 to 2019. In the study the method of noted observation was used, the subject of the study could be observed many times. The actions were observed due to the level of thinking processes. The analysis of the results shows that cooperation of the players in order to achieve the ultimate offensive objective of the game requires intentional actions based on thought patterns. These patterns taught in the training can guarantee not only anticipating in the realization of common tasks, but also making decisions that are best for the effectiveness of the game.</jats:p>

<jats:p>This study aimed to analyze the kinematical characteristics values of accurate penalty-kicking for Turkish football players in goalkeeper confrontation. Fifteen male Turkish Regional Amateur League players (Age: 21.08± 1.56 years old) was scanned, by two video cameras synchronous in two-dimensional (2D), placed at optical axes X&amp;Y. the best three tries of penalty kicking performance were analyzed by video analysis Dartfish 9.0 software. Standard statistical methods were used for the calculation of mean±sd, Pearson test for the correlations between all variables. A value of p-value ≤ 0.05 was considered a threshold of statistical significance. The results were shown in the ball contact phase that the distance pivot foot &amp; ball factor has a statistically significant effect in producing accuracy (p-value=.001), and the interaction between two main factors namely the trunk and inclination body angles has a statistically significant effect with a p-value≤.05 in producing accuracy too. In addition, in the followthrough phase, we can see too the statistically significant effect in p-value≤.005 of the trunk angle, and in pvalue≤.05 of the thighs angle in producing accuracy. As a conclusion, it can be conveyed that the distance between the support leg and the ball is very decisive for the kinematic profile formed such as contraction of the abdominal muscles (trunk angle), the amortization process (the pivot leg angle), shot power (angle and length of the shot leg swing trajectory), where these aspects are significantly affected to the shot power, ball velocity and the level of accuracy.</jats:p>

<jats:p>This study aimed to assess the predictive ability of body mass to estimate 4-6 repetitions maximum of pectoral machine, leg extension, and leg press exercises to optimize the one repetition maximum assessment. For this purpose, fourteen male soccer players (age 24.14 ± 4.66 years; body mass 76.52 ± 6.35 kg; height 1.83 ± 0.06m; training experience 17.71 ± 5.15 years) participated to determine 4-6 repetition maximum according to Brzycki protocol for each exercise in randomized counterbalanced order. A moderate significant correlation was showed between the 4-6 repetition maximum and the body mass (r = 0.440, 0.393 and 0.305) for pectoral machine, leg extension, and leg press exercises, respectively). The analyses showed that body mass weakly explained the three criterion variables (r2: 9-19%). The prediction equations suggested can be used to optimize the one repetition maximum test, but other factors must be considered in further studies to have more accurate 4-6 repetition maximum values</jats:p>