Background: This study used the uncontrolled manifold (UCM) approach to study joint coordination underlying the control of task-related variables important for success at dart throwing skill. Success at a task can be achieved, in principle, by always adopting a particular joint combination. In contrast, we adopt a more selective control strategy: variations of the joint configuration that leave the values of essential task variables unchanged are predicted to be less controlled (i.e., stabilized to a lesser degree) than joint configuration changes that shift the values of the task variables. Objectives: How this abundance of motor solutions is managed by the nervous system and whether and how the throwing in different distances affects the solution to joint coordination was investigated in this study. Methods: Our experimental task involved dart throwing to a target under three conditions (standard, short and long distance) that it performed by fifteen dart professional and semiprofessional athletes. The four joint angles of the arm were obtained from the recorded positions of markers on the limb segments. The variability of joint configurations was decomposed into components lying parallel to those sets and components lying in their complement with respect to control of the path of the arm’s center of mass and spatial position of the hand. Results: When performing the task in all three different conditions, fluctuations of joint configuration that affected arm’s center of mass and spatial position variables were much reduced compared with fluctuations that did not affect these variables. The UCM principle applied to arm’s center of mass and spatial position thus captures the structure of the motor control system across different parts of joint configuration space as the movement evolves in time. Moreover, constraints representing an invariant arm’s center of mass or the spatial position structured joint configuration variability in the early and mid-portion of the movement trajectory, but not at the time of throwing. This specific control strategy indicate a target can be hit successfully also by controlling irrelevant directions in joint space equally to relevant ones. Conclusion: The results suggests a specific control strategy in which changes of joint configuration that are irrelevant to success at the task are selectively released from control. As a result, the method can be successfully used to determine the structure of coordination in joint space that underlies the control of the essential variables for a given task.
Purpose: This research aimed to examine the effects of supramaximal eccentric contractions on the damage of muscle and recovery between the dominant and non-dominant arm. The study was participated by ten male volunteer students who do not have any musculoskeletal and metabolic compliant. This research designed as a cross-over type research. Material: Venous blood samples were drawn before the bout, immediately after the bout one min., moreover, at the 6th, 24th, 48th, and 72nd hours after training. Data were analyzed using the SPSS 21.0 statistical software package. After exercise, the non-parametric Wilcoxon Signed Ranks Test was used to decide the dominant and non-dominant arm influence. Statistical significance for all analyses was accepted at p< 0,05. Results: There was a significant statistical difference in the right, and left arm Creatine Kinase (CK) values at the time when exercise start, 48th and 72nd hours (p<0,05). There was no statistically significant difference in right and left arm Lactate Dehydrogenase values after exercise (p>0,05). Conclusions: There was an increase in muscle damage at 24th and 48th hours after supra maximal eccentric exercise, and it was turned back the start level at 72nd hours. While the arm which is non-dominant recovery is faster than the dominant arm.
Background and Study Aim. The paper is dedicated to the problem of the strength testing and training using the ergometer rowing performance in the flat water kayak sport. The aim of the research was to create a model of validity based on the relationship between the ergometer and on-water performance competition rowing. Material and Methods. Nineteen 15-17 years old male kayak rowers during the off-season were randomly divided into two groups. An experimental group trained according the same program as the control group, but two times a week a part of the common strength training exercises was substituted with a high-intensity strength training using the ergometer rowing. A whole amount of strength loading on all the rowers of the two groups was equal. Validity of testing and training of the ergometer rowing in the kayak sport was evaluated using interclass correlation between competition performance on 500 m on-water kayak and ergometer rowing. Results. Strong significant correlation is revealed between competition performance of on-water kayak and ergometer rowing before and after the off-season (| r | = 0.892, 0.902, p <0.001), that shows rather good validity. Other result of the correlation analysis shows good prognostic ability of the ergometer performance regarding competition performance of on-water kayaking (| r | = 0.913). Conclusions. The proposed model based on the relationship between the ergometer and on-water performance competition rowing shows rather good validity of the strength testing and training in the on-water kayak sport.
Purpose: Determination of mental status of the rifle shooters during the shooting performance is critical for the development of mental training programs according to their skill levels. The purpose of this study was to investigate the psychophysiological differences of expert and novice rifle shooters. Material: Fourteen expert (age: 28.08±9.12 years, height: 176.12±4.24 cm, weight: 73.56±5.28 kg) and twenty novice shooters (age: 21.08±3.12 years, height: 177.42±3.74 cm, and weight: 71.56±3.57 kg) participated in the current study. The participants performed five shootings from a distance of 10m. The averages of each shooter’s five shooting scores, values of attention and meditation, and heart rate between 5-sec before shooting and shooting moment were obtained. Results: It was determined that shooting scores (10.02 ±0.49 vs. 7.6±2.86, p<0.01, respectively) and meditation level (71.50±21.05 vs. 52.93±20.54, p<0.05, respectively) were significantly higher in the experts while attention level (73.63±21.11 vs. 59.76±21.26, p<0.05, respectively), and heart rate (105.34±12.12 vs. 98.67±7,12 bpm, p<0.05, respectively) were found higher in the novices. Conclusions: The novices and experts present different psychophysiological responses during the aiming period. It is suggested that the psychophysiological differences can be useful to categorize shooters and to provide feedback in training because it is important to develop programs according to group levels, especially in the development of mental training programs. Besides, it is determined that the mobile EEG device is an effective method for determining the mental status of athletes in sports specific activities.
Purpose: The purpose of this study is to compare two cold water immersion (CWI) protocols, continuous and fractionated, to optimize the recovery of Handball players after on recovery from exercise resulting in exercise-induced muscle damage. Material: Ten male Handball players (age: 15 ± 1.4 years, mass index: 67.2 ± 5.1 kg, height: 176.6 ± 7.30) voluntarily participated in the study. After three 90-minute training sessions (average heart rate 160 ± 15.81, 156 ± 5.53 and 156 ± 12.24 bpm) per week, participants were divided into 03 groups. The first experimental group (GE1) in continuous immersion (CWIC) of (12 minutes, 12± 0.4° C), a second experimental group (GE2) in fractional immersion (CWIF) of (4 x 2 min at 12 ± 0.4° C + 1 min out of water) and a control group (GC) in passive recovery. Body mass indices (BMI), countermovement (Countermovement jump) and muscle pain (Intensity of pain in the thighs) were measured. Results : The results concerning the percentage differences in the variation of the CMJ occurred respectively at 24h (Z = 12.62, p = 0.004) and 48h (Z = 16.22, p <0.001) compared to the control group. In addition, the results for muscle volume did not report any significant interaction (F (5.64) = 3.42, p = 0.078). The results of both protocols showed their effectiveness in reducing pain intensity by 24 and 48 hours after intense training (F (3.54) = 2.91, p = 0.016, p2 = 0.24). Conclusion: In conclusion, continuous and fractionated cold water immersion is beneficial for neuromuscular recovery 24 hours after intense exercise. The results also demonstrate a rapid recovery of handball players from their physical potential required in high level competitions.
Purpose: Thanks to the positive health effects of physical exercise, physical education is an integral part of the education system, with two hours per week, which is insufficient to achieve an optimal effect in transforming the anthropological status of children. The aim of the research was to determine the effects of regular and modified physical education with the application of contents from sports games (basketball, volleyball and handball) in the duration of one semester to changes in basic motor skills in pupils of the fifth grade of elementary school. Material: The study included N = 106 students of the V class, aged 10 to 11 years, clinically and mentally healthy, and with no pronounced morphological and locomotor impairments. The sample of examinees was divided into two subgroups. The first was an experimental group of 53 students, who carried out physical education classes according to the modified plan and program of sports games (basketball, volleyball and handball) for a semester. The other was a control group of 53 students who attended regular classes from physical education according to the current curriculum. Results: The results of the research at the descriptive level showed noticeable differences between the same groups in the final versus the initial measurements. Based on the results of the t-test for the control and experimental group, it can be concluded that there have been statistically significant changes in values on all variables of basic motor in the final compared to the initial measurement. By analyzing the results of the t-tests, it can be seen that the groups differ in the initial measurement only in one basic motor variable, MTAPN, and this difference is statistically significant in favor of the control group. In the final measurement, there are no significant differences between the control and the experimental group in the average values of all variables of basic motoring. Conclusions: Improving basic motor skills depends on the teacher's ability, the ability to transform the age with which he is working, and the success of certain training processes. The modified program of the experimental group has led to changes and thus proves the significant effect of the group's work program.
Purpose: Judo is a combat sport requiring physical qualities that include speed and coordination. They are essential for brief and intense attacks. Study the impact of a training based on coordination adapted to the age group (10 to 12 years) on the development of speediness among young’s judokas. Materials: The study was conducted at Svelty Club, sports association in Kenitra, city in north-western Morocco, from March 2nd, 2019 to May 5th, 2019, on a sample of 12 young judoka aged from 10 to 12 years divided into two groups, control group and experimental group. At first both groups received two tests, 10m speed test and Uchi Komi test, which we considered initial tests. The experimental group had a training program spread over 12 weeks that focused on the development of speed through coordination. For the control group, we followed the regular training of the club. Both tests were re-administered after the end of the training program (final tests). Results : The initial test value for the experimental group for Uchi Komi test was 7 ± 0.9, and the final test was 8.7 ± 1.03, which shows a significant difference according to the T test, (p = 0.001≤ 0.05) in contrast to the control group (p = 0.23≥0.05). For the 10m speed test, the experimental group showed a significant difference between the value of the initial test and the final test (p = 0.003≤0.05), unlike the control group (p = 0.93≥0.05). Conclusion: The development of physical qualities is still the primary goal of coaches; however this development is more decisive for young athletes. Our study has shown that a coordination training adapted to each athlete’s age can help coaches better develop other qualities namely speed.
Background and Study Aim: Talent identification/development programs are utilized by sports federations to select or train elite athletes. In addition to the established tests that assess perceptive and motor skills, it was deemed significant that cognitive skills should be evaluated as well. The present study was undertaken to assess the utility of Instruction-Based Selective Action Pattern (IBSAP), a novel method that we developed, in estimating perceptive, motor as well as cognitive skills of athletes in order for talent identification. We also investigated the relationship between IBSAP and auditory reaction times (ARTs). Material and Methods: Forty-three students (average age: 12.6 years) participated in the study. Random/fixed-interval ARTs were recorded. IBSAP was applied using a table tennis robot that was set up to throw 30 balls in three different colors to different spots on the table with a frequency of 1 ball/s. The subjects were instructed to ignore the white balls, to touch the yellow balls, and to catch the pink balls before the first trial and their scores were calculated in two consecutive trials according to a scoring system. Results: Our results showed that motor learning, adaptation and reinforcement of the participants were significantly greater in second trial compared with the first trial and that IBSAP values were correlated with ARTs. Conclusions: We conclude that the IBSAP method reliably provides quantitative data on perception, motor as well as cognitive skills and it can be considered as a useful tool for talent identification.
Background: Football is a game in which anthropometric characteristics are important factors for specific player positions, where morphological characteristics differ in relation to the competitive level and the position in the game. Body composition is an important indicator of the physical fitness and general health of athletes so today its often discussed in scientific literature. The aim of the research was to determine the differences in the anthropometric characteristics of the professional football players in relation to the player's position and to determine their importance in the game. Material: Twenty-nine male football players of the national team of Serbia participated in the research, in which the body height, weight and Body mass index were measured. Results: The results of the study indicate that statistically significant differences in body height and body weight were recorded between goalkeepers and midfielders (p <0.01) and goalkeepers and attackers (p <0.05) in favor of goalkeepers, while no statistically significant differences were recorded in the Body Mass Index. The lowest height, weight and BMI were recorded in the midfielders. Conclusions: Based on the results of the research it can be concluded that the morphological characteristics have a vital role in determining the success of athletes. Football coaches can use the results of this study as a means to better understand and interpret anthropometric characteristics and their importance in relation to the gaming position. The acquaintance of noticed differences could improve the training process as well as the selection at the early age.
Background and Study Aim: Cardiovascular diseases are currently classified as civilization diseases. The number of cases since the 20th century has dramatically increased. Currently, as many as 46% of all deaths in Poland are caused by diseases of the circulatory system. The aim of the study is to assess the impact of cardiac rehabilitation according to the C model on exercise tolerance and hemodynamic indices in patients after a cardiac incident. Material and Methods: The research was carried out in the Department of Cardiac Rehabilitation in Szymbark. The study group consisted of 32 patients who, after physical examination at admission, were qualified for the preliminary assessment of physical fitness on the basis of 6MWT. The test was carried out the day after the admission, according to current standards. Subsequently, the examined persons underwent a 28-day cycle of early cardiac rehabilitation according to the C model. Results: As a result of a 4-week cardiac rehabilitation, a statistically significant improvement in physical performance was obtained, with a distance increase of 68.34 m on average. A statistically significant change in the level of fatigue according to Skala Borga after the completion of the rehabilitation cycle was demonstrated. Patients with normal body weight, overweight and obesity received a similar increase in 6MWT results due to the rehabilitation cycle. Conclusions: The results of this study indicate the urgent need to educate patients in the prevention and prevention of cardiovascular disease and to increase the availability of rehabilitation for all people after a cardiological incident.
Intermittent altitude exposure leads to improvements in aerobic performance and blood parameters of athletes. The variety of hypoxic devices and simulated altitude training models requires a detailed study of their effects to achieve the best results. The aim of this study was to investigate the effect of a four-week training camp at sea level conditions, combined with normobaric hypoxia, provided by hypoxicators during the night's sleep of the athletes. Sixteen rowers of the Bulgarian national team (17.13±0.83 years old) were divided into a control group (n=8) and an experimental group (n=8) subjected to hypoxia for a period of four weeks. At the beginning and end of the training camp, anthropometric and hematological data were measured. A submaximal test on the Concept II rowing ergometer was performed, and the physical work capacity and anaerobic threshold were determined. The results showed: 1) a lack of significant changes in the aerobic performance after training camp, both within and between groups; 2) at the end of the training camp in the experimental group a statistically significant increase in hemoglobin concentration (156.25±4.11 vs 162.75±4.11 g/L, p<0.01) and erythrocyte count (5.26±0.13 vs 5.49±0.10 g/L, p<0.01) was observed. The encouraging results regarding the higher increase in blood oxygen-carrying capacity in the experimental group did not lead to an increased working capacity. Further research should be provided in the search for optimal hypoxic training parameters, allowing not only a rise in hemoglobin concentration, but also the preservation of blood rheological properties.
Purpose: The aim of this study is to analyse the effect of relative age in anthropometric measurements, muscular strength of adolescent swimmers. Material and Methods: The study sample was composed of 40 volunteers adolescent well-trained swimmers. Participants were grouped as swimmers born in the first quarter (January, February and March) and in the last quarter (October, November and December) of the same year. Anthropometric measurements were taken from each participant, and body mass index of participants were calculated. To determine performance parameters, handgrip, back and leg strength tests were performed on participants. The level of statistical significance was set at p < .05. Results: Statistical analysis showed that there were statistically significant differences in the body height and BMI ( p < .05 ), but body weight differences were not statistically significant between swimmers who are born first and last quarter of the same year ( p > .05 ). There were significant differences in the means of absolute leg and handgrip strength between relative age groups. There were statistically significant differences in the means of relative back, leg and handgrip strength between groups ( p < .05 ). All mean relative strength values of participants significantly differed in favour of the group born in the first quarter of the year. Conclusion: As a result of this study, it is determined that relative age has an effect on the measured anthropometric and muscular strength parameters of adolescent well-trained swimmers. The findings of this study revealed that relative age is an important factor to be considered in swimming performance in adolescent swimmers.
Purpose : The researches about the relationship between self-efficacy and athlete' burnout of elite volleyball players who playing in high level leagues is not available in the literature. The aim of this study is to investigate the relationship between self-efficacy and athletes’ burnout in elite volleyball players. Material : The study group is consisted 173 [n=61 female, n=112 male] elite volleyball players. The mean of the age of participants was 25.6 year [± 6.3]. Data was collected by personal information form, General Self-Efficacy Scale [GSE] and Athlete Burnout Questionnaire [ABQ]. SPSS 22 program was used in the analysis of the obtained data. Kolmogorov-Smirnov test was applied to determine whether the data showed normal distribution and the significance level was accepted as 0.05 in the analyses. Parametric tests were used in the analysis of the data. Results : As a result of the research, high level negative correlation was found between effort and resistance sub-dimension [GSE] and the reduced sense of accomplishment sub-dimension [ABQ] [p<0.01]. In the same way, there was a negative correlation between ability and confidence sub-dimension [GSE] with reduced sense of accomplishment sub-dimension [ABQ] [p<0.01]. Conclusions : This result shows that athletes with high general self-efficacy level have less athlete burnout than others. Volleyball players who played in national teams have higher self-efficacy than others, while athletes have less athlete' burnout. Gender has no relation on volleyball players' self-efficacy and burnout. As the age of the participants decreased, burnout levels increased.
Aims: Monitoring is a new method that allows coaches and physical trainers to manage training in order to meet the needs of athletes. This study aims to evaluate through a scientific approach the homogeneity between the training program established by the coach in the pre-competition period, and the characteristics of the competition. Materials : The study was conducted at the FAR (Royal Armed Forces) Sports Association in Salé from February 10, 2019 to March 16, 2019, on a sample of 12 taekwondo athletes (5 girls and 7 boys), category "senior" with a middle age of 26.28 ± 1.97 for boys and 24.4 ± 3.32 for girls. The data collection concerns two different periods, the training and the competition period, in order to make a comparison between the different phases of the combat situations (preparation phase, exchange phase and recovery phase) during these two periods: Results: For the combat in the training period we saw that the percentage of the preparation phase was 80.11%, the exchange phase was 19.69%, and the recovery phase was 0.18%, however, in the competition period, the percentage of the preparation phase is 21.60%, the exchange phase is 39.84%, and the recovery phase is 38.54%. The study of the correlation between the three phases of combat in the training period and the competition shows that there is no link between the different phases except between the exchange phase and the recovery phase (sig = 0.021 < 0.05). Conclusion: Our study was able to reveal that the requirements of the competition were not taken into consideration by the coach, which influenced the performance of the athletes during the competition. Therefore, a monitoring program is necessary in order to better plan the training and even predict the results of the competition
Purpose: the article deals with providing a characteristic of muscle and tone status as well as precerebral and cerebral hemodynamics in kickboxers. Materials: 102 athletes with the qualification from the Second-class Athlete to the Master of Sport voluntary participated in the study. The average age of athletes at the moment of the study was 20.90±0.50. The average sports experience of participants was equal to 4.15±2.77. The control group consisted of apparently healthy young males of the same age but not involved in sports activities (n=35). The indicators of muscle tone and strength and cerebral blood flow were studied with the help of Doppler ultrasound of the main arteries of the head, electroneuromyography, and transcranial Doppler. Results: the article provides the results of the study on the effect of muscle and tone disturbances in the spinal motion segment on the functional status of precerebral and cerebral blood flow. The disturbances in nerve conduction velocity in the symmetrical groups of trunk muscles are considered as the reason for muscle imbalance in 50% of athletes. The analysis of blood flow indicators in kickboxers with muscle imbalance revealed a typical increase in the tone of precerebral vessels and changes in the gradients of blood flow velocity in various segments of the carotid and vertebral arteries. The decrease of cerebral blood flow in athletes, in particular, the venous outflow of a dystonic nature, is the result of spasmodic and ischemic Doppler patterns against a decreased indicator of arteriovenous balance. Mild traumatic brain injuries should also be taken into account when speaking about the development of cerebrovascular dysfunction as a result of kickboxers’ sparring activities and competitions. Conclusions: Differentiated disturbances in sensory and motor conductivity result in the disturbance of afferentation and muscle imbalance intensity. Angiospasm and vascular ischemia determine the increase in the linear blood flow velocity in the carotid system and the decrease in the vessels of the vertebrobasilar system against the increase in resistivity indicators in the carotid basins and vertebrobasilar system in kickboxers. Correlation analysis revealed visceral motor correlations, which proved the influence of the functional status of the regional muscle system on cerebral hemodynamics. The analysis of tone and strength muscle characteristics and cerebral blood flow in kickboxers indicates the necessity of correcting muscle and tone asymmetry of the paravertebral area.
Purpose : Comparative analysis of the physical development features and somatotype of girls and women involved in fitness. Material : The experiment involved 95 girls and women, divided into 2 groups. Group 1 - 48 girls (36.04 ± 0.19) years, Group 2 - 47 women (43.26 ± 0.22) years, (p <0.01). Participants practiced fitness 2-3 times a week. The duration of the training was 60 minutes. It was determined the body mass and body length, wrist circumference, waist and hips circumferences. The TANITA BC 587 analyzer was applied to determine muscle and fat mass, the specific weight of fat tissue, water content, percentage of visceral fat, basal metabolism value, bone mass mineralization. It was calculated the body mass index and the waist-to-hip ratio. The results were evaluated applying the Student's t-test (t) and Rosenbaum (Q) and Wilcoxon - Mann - Whitney (U) criteria. Results : There were no significant differences in body length and body mass. The girls confirmed a less value of hip circumference (t = 2.04, p <0.05) and a tendency to less waist circumference (t = 1.97, p <0.1) in comparison with group 2. The participants of group 2 had a larger wrist circumference (U = 891, p <0.05). According to this parameter, persons with asthenic body type prevailed among participants. Their specific weight was (56.25 ± 7.16)% of group 1 and (53.19 ± 7.28)% of group 2. It was confirmed less absolute body fat content in group 1 (t = 2.09, p <0.05). All participants were characterized by larger muscle mass. There were no differences in this parameter between groups. It was determined the high concentration of specific weight of fat tissue in comparison with age standards. The content of visceral fat was within the age norm. Its content was higher in group 2 (Q = 18, p <0.01). The basal metabolic value was larger in group 2 (Q = 17, p <0.01). The values of bone mass mineralization reflect the correspondence to the body mass of the participants. This parameter did not have significant differences in the groups. The body mass index value in group 1 was within the average interval. In group 2, this index was higher than the standard one. The body mass index in group 1 was significantly lower (t = 2.18, p <0.05). The participants with a body mass index above the norm were (35.42 ± 6.90)% of group 1 and (59.57 ± 7.16)% of group 2. The prevalence of waist-to-hip ratio above the norm was (54.17 ± 7.19)% 1 group and (59.57 ± 7.17)% 2 group, (p> 0.05). Conclusions : it was determined the proximity of the main anthropometric parameters (mass and body length). The girls have lower values of the hip circumference. Persons with asthenic body type prevailed among the participants. Analysis of the indices confirmed the high prevalence of overweight and high risk of developing metabolic syndrome. The application of bio-impedance method confirmed and clarified the results of anthropometric research. The participants demonstrated the increased content of subcutaneous and visceral fat, increasing with age. The water level in the body gradually decreases with age. This is considered as a reflection of age-related physiological changes in metabolism and should be considered in fitness training organizing. Studies have confirmed the informativeness and adequacy of the bio-impedance method.
It is known that prominent world-class swimmers are characterized by the manifestation of specific abilities. These abilities allow to constantly maintain a stable speed swimming of different segments of the distance. In this case, highly qualified swimmers can increase the maximum speed of swimming on a segment of a given length. They achieve this by increasing the total external mechanical power. In this case, swimmers keep, and in some cases even reduce the power of the stroke. It is implemented the phase-specific principle of creating driving forces during each phase. At the same time, the principle of creating driving forces is common to all swimming locomotion. The article gives a rationale for the effectiveness of the integral criterion application for evaluating swimming techniques. The integral criterion for evaluating the swimming technique was applied at remote speeds of the entire spectrum of the competitive front crawl swimming program. Material . The study involved 9 highly qualified crawl-stroke swimmers, members of Russia national team. The age of the participants ranged from 18 to 24 years. It is studied the kinematic and kinetic characteristics of the front crawl swimming technique of highly qualified athletes at various competitive distances. The studies applied video recording of swimmer’s movements with OLYMPUS TG-5 camera (Vietnam) from a depth of 4.5 m. Three luminous markers located on the swimmer’s hips were applied to record the dynamic parameters of swimmer’s movements. The results of the swims were processed with Natatometry™ (Russia). Results . It was determined that swimmers demonstrated high indices of the intra-cyclic dynamic index (ICDI - Intra Cycle Dynamic Index) and the dynamic coordination index of the swimming cycle (DCI - Dynamic Coordination Index) at speeds in medium distances relative to speeds at sprint distances. Swimmers demonstrate the ability to generate a significant amount of promotional efforts at 100 m distance that ensure the achievement of high speeds. It is established that no general trends in ICDI changes in individual structural phases of the stroke. This indicates the demonstration of individual specific features in the swimming technique of each athlete. Conclusion . It is considered the feasibility of applying the integral indicators ICDI and DCI for a quantitative assessment of the intra cycle promotion forces interaction and hydrodynamic resistance forces arising at the level of an integral biomechanical system of the swimming cycle.
The purpose of the study is to identify self-reliance manifestation features among qualified athletes of different sports. Material and methods. The study participants were representatives of combat sports (boxing) n = 23, complex-coordination (gymnastics) n = 25, speed-strength (discus throw) n = 23, and also cyclic sports (swimming) n = 38. In total 109 sportsmen. The age of the respondents was from 16 to 18 years old. Comprehensive psycho-diagnostic methods diagnose self-reliance level and manifestation degree of athletes’ personal qualities. Results. The results of the study confirmed our hypothesis that athletes of various sports may experience specific features of self-reliance. It has been established that self-reliance level is higher than average for representatives of combat and complex-coordinated sports. Representatives of cyclical and speed-strength sports are characterized with an average self-reliance level. Combat and complex-coordination sports are very similar according to the specifics of self-reliance expression. Self-reliance possibility data comparison among cyclical and speed-strength athletes showed their certain homogeneity. It has been revealed that only a future activities reflection is closely related to a self-reliance among boxers (Spearman rank correlation = -.478). There are two correlations in the sample of gymnastics representatives. An increase in the overall reflection index (Spearman rank correlation = -.489) and the future activities reflection index (Spearman rank correlation = -.427) leads to self-reliance decrease among gymnasts. The inhibitory effect of future activity reflection on the athletes’ self-reliance level has been established empirically. We determined that self-assessment is a personal formation that actualizes self-reliance of swimmers and discus throwers. (Spearman rank correlation = .618). Conclusions. The handled comparative analysis of self-reliance of different sports athletes has verified its high informative value. Statistically significant differences recorded in the self-reliance level among of boxing, gymnastics, discus throwing and swimming athletes. The high informative value of used questionnaire allows recommending it as a screening tool during promising athletes selection.
Purpose: The aim of this study is to examine the impacts of existence or absence of musculus palmaris longus (MPL) on serve speed and certain motoric properties in the tennis players. Material: In the study, 25 male volunteers participated, who are playing tennis at university level and in whom the existence of musculus palmaris longus was checked. The ages of volunteers, who participate in tennis activities under licenses, vary between 18 and 25 and they have no disability or illness in the upper extremity. The experimental group (n=7) is comprised of individuals, who do not have musculus palmaris longus, while the control group (n=18) is comprised of individuals having musculus palmaris longus. Results: The age averages of the groups participating in the study was 21, 89±2, 246 years old for the group with musculus palmaris longus, while it was 22, 00±2, 517 years old for the participants without the musculus palmaris longus; as per their average height, it was 174, 94±5, 713 cm for the group with the musculus palmaris longus, while it was 174, 71±3, 546 cm for the participants without the musculus palmaris longus; the body weight average was 70, 83±5, 79 kg for the participants with musculus palmaris longus, while it was 72, 14±4, 059 kg for the participants without the musculus palmaris longus; sports-age average was 13, 00±1, 645 years for the ones with musculus palmaris longus, while it was 12, 29±1, 380 years for the participants without musculus palmaris longus. It was determined that there was statistically significant difference for the serve speed (p<0, 001) and the hand flexion strength (p<0, 05) parameters of the participants; however, there was statistically no significant difference (p>0, 05) in other parameters. Conclusions: As the conclusion, existence of musculus palmaris longus in tennis players positively influences the hand wrist flexion strength, however, it negatively influences the serve speed.
Purpose: Weight control and weight loss during the periods of wrestling competitions are attached great importance -in order to be successful in wrestling. Leptin hormone level is known to play an important role in the control of body weight. For this reason, the purpose of this study was to investigate the effect of substantial weight loss on serum leptin levels of women wrestlers during competition periods. Material and Methods: Twenty-five women wrestlers who trained for 2015 European Championship from Turkish National Wrestling Team and 26 sedentary women were recruited voluntarily for this study. Serum leptin levels of wrestlers in the experimental group and sedentary women in the control group were measured after overnight fasting before and after 21 days training camp of 2015 European Championship. Results. Statistically significant difference was found in the direction of decrease in body weight, body mass index (BMI), glucose, insulin, cholesterol, triglyceride, LD, VLDL and leptin parameters and increase in HDL parameters before and after training camp in the experimental group ( p < .05 ). There was a statistically significant difference in leptin levels between the control group and women wrestlers ( p < .05 ). There was also a statistically significant difference in leptin levels of wrestlers before and after training camp ( p < .05 ). Conclusion. As a result, the data obtained in the study indicate that intense wrestling trainings in camping period brought about weight loss and decreased leptin levels.
