Search results

1

Non-Linear Periodization for General Fitness & Athletes

100%

Fleck S.

Journal of Human Kinetics

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2011

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vol. 29A

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issue Special Issue

41-45

EN

Periodization of resistance training or planned changes in training volume and intensity are used to maximize strength and fitness gains. Several types of periodized resistance training plans have been developed. The most common of these plans is linear also termed classic or strength/power periodization and nonlinear periodization. The biggest difference between these two types of training plans is with nonlinear periodization changes in training volume and intensity are made more frequently. The most common type of nonlinear periodization is daily nonlinear periodization where substantial changes in training intensity and volume are made from one training session to the next training session. Periodized resistance training does result in greater strength gains than non-periodized programs. While both linear and nonlinear periodization plans result in significant strength and fitness gains some research indicates greater strength gains with daily nonlinear periodization.

2

A biomechanical model correlating shoulder kinetics to pain in young baseball pitchers

100%

Keeley D. W., Oliver G. D., Dougherty C. P.

Journal of Human Kinetics

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2012

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vol. 34

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issue 1

15-20

EN

Previous work has postulated that shoulder pain may be associated with increases in both peak shoulder anterior force and peak shoulder proximal force. Unfortunately these relationships have yet to be quantified. Thus, the purpose of this study was to associate these kinetic values with reported shoulder pain in youth baseball pitchers. Nineteen healthy baseball pitchers participated in this study. Segment based reference systems and established calculations were utilized to identify peak shoulder anterior force and peak shoulder proximal force. A medical history questionnaire was utilized to identify shoulder pain. Following collection of these data, the strength of the relationships between both peak shoulder anterior force and peak shoulder proximal force and shoulder pain were analyzed. Although peak anterior force was not significantly correlated to shoulder pain, peak proximal force was. These results lead to the development of a single variable logistic regression model able to accurately predict 84.2% of all cases and 71.4% of shoulder pain cases. This model indicated that for every 1 N increase in peak proximal force, there was a corresponding 4.6% increase in the likelihood of shoulder pain. The magnitude of peak proximal force is both correlated to reported shoulder pain and capable of being used to accurately predict the likelihood of experiencing shoulder pain. It appears that those pitchers exhibiting high magnitudes of peak proximal force are significantly more likely to report experiencing shoulder pain than those who generate lower magnitudes of peak proximal force.

3

THE SCOUT METHOD PROTECTS THE PERCEPTION AND WORKING MEMORY OF OUR YOUNG PEOPLE AGAINST THE NEGATIVE INFLUENCE OF SOCIAL NETWORKS

100%

Louragli I., Taalab Y. M., Aboussaleh Y., Khadmaoui A., Bikri S., Hafid A., Benmhammed H., Benmhammed H., Touil D., Hakim H., Ahami A.

Acta Neuropsychologica

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2020

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vol. 18(3)

327-337

EN

Social networks are effective and easy-to-use means of communication in the modern age technology. They remarkably influence the young users’ behavior being so entranced in such a virtual world which would easily develop into addiction. In this study we aim to measure the impact of addiction to Facebook on perception and working memory comparing two groups of young people, and how to protect scouting young people against this attachment or addiction. The study was carried out in the national center of scouting of Morocco at Ibn Tofail University on 53 master students with an average age of 24.45 years and 50 young scout leaders of Hassania Marocain scouting, who have an average age of 24.06. The educational level of these young people is between the 1st year of higher studies and the master degree. Digital test of complex Rey-Osterrieth figure and a Facebook addiction test questionnaire were used. The comparison of the means of attachment to Facebook between the two studied groups using T-test showed significant result (t = -2.510; P = .014 <0.05) with scout leaders demonstrated higher average of attachment to Facebook than that detected by master students. The results showed a statistically significant negative correlation between the hours consumed per day on Facebook and the perception and working memory. The perception of young Scout leaders is better than that of master students. We concluded that attachment to social networks influences working memory and perception, while the Scout method would serve as a new remedy for this scourge.

4

Assessment of Knowledge and Attitude in the Field of Doping in Young Athletes of Team Games

100%

Duda H., Stuła A.

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vol. 37

57-63

EN

Contemporary sport is becoming more and more commercialized, hence the players strive to win at all costs, and to achieve this goal, they consider all means to be allowed. In order to be constantly on top, competitors change their training methods, use various aids, and finally direct their interests towards doping. Doping is considered to be the use of substances and all means intended to artificially increase physical fitness during sports competitions, which may be harmful to the ethics of sport or cause mental and physical harm to athletes. The aim of the research is to assess the knowledge of the problem and attitudes of young people practicing sports games towards the dangers of doping. Assessment of knowledge on the effects of the use of illicit means, and analysis of opinion on the use of doping and strengthening mechanisms for the adoption of pharmacological agents. Research on the knowledge about the use of support measures and doping in sport was carried out among talented youth practicing team sports games in randomly selected clubs of Małopolska, Silesia, Podkarpacie and Opole. Continuation studies were conducted in 2018-2020, they covered 60 girls and 60 boys, aged 16 years. The research was carried out using a questionnaire, the questions of which concerned the following problems: knowledge of the essence of sports doping, the relationship between doping and the principle of fair play in sport, support used in physical recreation, reasons for the use of doping, moral and criminal liability in the use of doping. When analyzing the results of the research, it should be noted that the use of doping in sport is negatively perceived by the examined youth. However, it can be assumed that the knowledge about the support and the problem of doping in sport is insufficient. Setting the main goal - sports success and the related financial rewards, as well as the willingness to be the best in the opinion of the respondents may narrow the boundaries, which may facilitate the decision to use support and doping. These observations seem to be very disturbing, as the analysis of research data concerns young people practicing sports at the stage of education and the utilitarian nature of physical activity.

5

Heart Rate Responses and Training Load During Nonspecific and Specific Aerobic Training in Adolescent Taekwondo Athletes

100%

Haddad M., Chaouachi A., Wong D., Castagna C., Chamari K.

Journal of Human Kinetics

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2011

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vol. 29

59-66

EN

The efficacy of replacing generic running with Taekwondo (TKD) specific technical skills during interval training at an intensity corresponding to 90-95% of maximum heart rate (HRmax) has not yet been demonstrated. Therefore, the purpose of this study was to compare the HR responses and perceived exertion between controlled running and high-intensity TKD technical interval training in adolescent TKD athletes. Eighteen adolescent, male TKD athletes performed short-duration interval running and TKD specific technical skills (i.e. 10-20 [10-s of exercise interspersed with 20 s of passive recovery]) in a counterbalanced design. In both training methods, HR was measured and expressed as the percentage of HR reserve (%HRres). Rating of perceived exertion (RPE, Borg's category rating-10 scale), Banister's training impulse (TRIMP) and Edwards' training load (TL) were used to quantify the internal training load. Recorded cardiovascular responses expressed in %HRres in the two training methods were not significantly different (p > 0.05). Furthermore, the two training methods induced similar training loads as calculated by Banister and Edwards' methods. Perceived exertion ranged between "hard" and "very hard" during all interval training sessions. These findings showed that performing repeated TKD specific skills increased HR to the same level, and were perceived as producing the same training intensity as did short-duration interval running in adolescent TKD athletes. Therefore, using specific TKD kicking exercises in high-intensity interval training can be applied to bring more variety during training, mixing physical and technical aspects of the sport, while reaching the same intensity as interval running.

6

Can Programmed or Self-Selected Physical Activity Affect Physical Fitness of Adolescents?

88%

Neto C. F., Neto G. R., Araújo A. T., Sousa M. S. C., Sousa J. B. C., Batista G. R., Reis V. M. M. R.

Journal of Human Kinetics

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2014

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vol. 43

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issue 1

125-130

EN

The aim of this study was to verify the effects of programmed and self-selected physical activities on the physical fitness of adolescents. High school adolescents, aged between 15 and 17 years, were divided into two experimental groups: a) a self-selected physical activity group (PAS) with 55 students (aged 15.7 ± 0.7 years), who performed physical activities with self-selected rhythm at the following sports: basketball, volleyball, handball, futsal and swimming; and b) a physical fitness training group (PFT) with 53 students (aged 16.0 ± 0.7 years), who performed programmed physical fitness exercises. Both types of activity were developed during 60 min classes. To assess physical fitness the PROESP-BR protocol was used. The statistical analysis was performed by repeated measures ANOVA. The measurements of pre and post-tests showed significantly different values after PFT in: 9 minute running test, medicine ball throw, horizontal jump, abdominal endurance, running speed and flexibility. After PAS differences were detected in abdominal endurance, agility, running speed and flexibility. The intervention with programmed physical activity promoted more changes in the physical abilities; however, in the self-selected program, agility was improved probably because of the practice of sports. Therefore, physical education teachers can use PFT to improve cardiorespiratory fitness and power of lower and upper limbs and PAS to improve agility of high school adolescents.

7

Nutritional Status Associated with Metabolic Syndrome in Middle-School Children in the City of Montes Claros - Mg, Brazil

88%

Cruz I. R. D., Mourão D. M., Freitas D. A., Souza A. G. S., Pereira A. R., Aidar F. J., Carneiro A. L. G.

Journal of Human Kinetics

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2014

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vol. 43

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issue 1

97-104

EN

The aim of this study was to investigate the association between nutritional status and prevalence of metabolic syndrome (MS) in middle-school students in the city of Montes Claros - MG. The sample consisted of 382 students, aged 10-16 years. Nutritional status was evaluated using the Body Mass Index (BMI). Metabolic syndrome (MS) was defined as the presence of two or more criteria in accordance with definition of the International Diabetes Federation. The overall prevalence of MS was 7.9%. 9.7% of students with MS were overweight and 72.4% were obese. Therefore, it can be inferred that carrying excess weight considerably increases the chances for a child to develop MS, and concomitantly increases the child’s risk for developing cardiovascular disease.

8

Somatotype of Competitive Youth Soccer Players From Brazil

88%

Fidelix Y. L., Berria J., Ferrari E. P., Ortiz J. G., Cetolin T., Petroski E. L.

Journal of Human Kinetics

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2014

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vol. 42

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issue 1

259-266

EN

The aim of this study was to identify the morphological configuration of youth athletes from professional soccer clubs and to verify their differences according to the tactical position on the field. Overall, 67 male players aged 15 to 17 years were evaluated. The examined anthropometric measurements included body mass, body height, skinfolds (triceps, subscapular, supraspinal and medial calf), girths (flexed and tensed arm and calf) and breadths (humerus and femur). For statistical purposes, analysis of variance and post hoc Bonferroni and Kruskal-Wallis tests were used. We concluded that goalkeepers were heavier and taller than center backs (p = 0.015 and p = 0.001), midfielders (p = 0.005 and p <0.001) and center forward players (p = 0.024 and p <0.001). The average somatotype for defense, forward and goalkeeper positions was a balanced mesomorph. Midfield players showed ectomorphic-mesomorph characteristics. It was concluded that goalkeepers were characterized as being taller and heavier and that somatotype features of athletes were similar between positions, except for midfield players

9

Are Sportsmen Willing to Practice Sports during their Holidays? The Case of Sports Faculty Students in France

88%

Abdourazakou Y., Penel G., Masson P.

Physical Culture and Sport. Studies and Research

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2012

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vol. 56

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issue 1

59-64

EN

The study was conducted in northern France at the sport management department at the University of Lille. It attempts to highlight the type of summer vacation of its students. Previous studies have shown the modalities of mobility (Urry, 2000; Seewer, 2004). Although models exist to explain destination choice, many of these have limitations, including the assumption of a rational consumer and a focus on the functional attributes of travel and tourism (Lewis, Kerr, & Pomering, 2010). However, few studies handle the behavior of consumption of students during their holidays, especially the sports students. In making their travel decisions, consumers assess the attractiveness of a destination (Sirakaya et al., 2001). Positive associations with a destination increase the likelihood of selection (Woodside & Lyson-ski, 1989). The main hypothesis concerned the type of sports that students were engaged while on vacation. That is, we postulated that students also practiced sport during their vacation time. The second hypothesis concerned the mobility that these students should be accustomed to in order to travel in competitions abroad or at least away from home. The study was conducted in a quantitative manner, with questionnaires (N=451). The main results are based on 451 Physical Education (PE) students from the area of Lille, France, who participated in this study. In this population, 55.2% were single, 44.8% were married or in a relationship (10.2% had children). Initial results show that the average household income per month is about EUR 2,500; over 74% of them go on holiday for two weeks, on average. These students are coming from wealthy families. When they say that they are “going on vacation”, a majority of them (68.7%) indicate that the main reason is to relax. Contrary to the announced hypothesis, few PE students (4.9%) wish to practice physical activities during the holiday. Independently, we noticed that a majority of student (79.5%) preferred a single destination when the purpose was to make cultural trips (51.5%). However, the question of the budget remains an issue and they favor (78%) being hosted in the cheapest accommodations. For instance, the accommodations concerned are mostly camping or holiday villages. These findings can be interesting to satisfy this kind of demand and help providers build better strategies.

10

Anthropometric and Physical Fitness Differences Among Brazilian Adolescents who Practise Different Team Court Sports

88%

Silva D. A. S., Petroski E. L., Araujo Gaya A. C.

Journal of Human Kinetics

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2013

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vol. 36

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issue 1

77-86

EN

The objective of this work was to compare the anthropometric and physical fitness characteristics of Brazilian adolescents who practise team court sports and to compare specific parameters obtained for adolescents with data from the general population. This was a cross-sectional study of 1,348 male adolescents grouped as follows: basketball players (n = 287), indoor soccer players (n = 665), handball players (n = 108) and volleyball players (n = 288), all between 10 and 14 years of age. Anthropometric (body mass, body height, arm span, and body mass index) and physical fitness data (flexibility, muscular strength, explosive power, speed, aerobic fitness and agility) were collected. The Brazilian population was used as a reference and compared to the adolescent subjects using Z scores for all variables. Anthropometric characteristics and performances in physical fitness tests differed (p<0.05) among players of different sports. In addition, for each variable assessed, adolescents who practised team court sports showed similar or improved results compared to their counterparts in the general population (p<0.05). Furthermore, the anthropometric and physical fitness characteristics differed depending on the team court sport practised. These findings may elucidate which physical abilities are most impacted by the practise of a particular team sport as well as help teachers and physical education and sport professionals identify talented adolescents.

11

Analyzing Body Values in the Context of Postmodern Youth Education. A Comparative Study Between Italy, Latvia and Romania

88%

Isidori E., Abele A., Sandor J., Ganea I., Taddei F., Maulini C.

Physical Culture and Sport. Studies and Research

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2010

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vol. 49

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issue 1

65-71

EN

Nowadays, research on the body and the values it embodies is considered fundamental in the research field of sport studies. There is a correlation between the choice of values preferred by youth and changes taking place in contemporary society. The postmodern society is a society in which body values prevail over all other ones; the type of body values dominant in a capitalist society are mostly those which are connected to the hedonistic, esthetic and emotional dimension of the body itself.Starting from this background, this study aims to draw the hierarchy of body values, focusing on sport sciences students at Italian, Latvian and Romanian universities, who will be future educators and professionals of body care and well-being in the European society, in order to understand their preferences and the possible cultural differences that can emerge from the three societies.To carry out the research, a randomized sample of 300 subjects - female and male students (100 per country) - attending first-, second- and third-year sport sciences courses at the University of Rome "Foro Italico", the Latvian Academy of Sport Education in Riga, and Babes-Bolyai University of Cluj-Napoca were selected.The students' values hierarchy was obtained through a Likert-scale-based questionnaire adapted and translated into Italian, Latvian and Romanian. The aim of the questionnaire was to detect the level of agreeability or disagreeability shown by each student when presented with words regarding 10 main body values models: biological body; ecological body; instrumental body; dynamic/sporting body, emotional/social body; ethical body; esthetical body; religious body; intellectual body; pleasure body.The data obtained were statistically processed and compared. The results showed that the hierarchy of body values in young students of sports sciences is broadly in line with those of postmodern society and education, and that there are differences in the perception of values among students due to cultural differences and the traditions of the societies in which they live. The research also highlighted the need to develop a more effective moral education, one that focuses on ethics, in the curricula of the three universities studied.

12

The Effects of an Alternative Training Method on Physical and Technical Abilities of Adolescent Soccer Players: A Pilot Study

88%

Bogiatzidis E., Ispyrlidis I., Gourgoulis V., Bogiatzidou A., Chatzinikolaou A., Mantzouranis N., Smilios I.

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vol. 37

45-56

EN

This study examined the effects of an alternative strength training method during soccer training on the development of physical and technical abilities of youth soccer players. 17 soccer players (age: 15±0.5 years) were divided in a control group (CG) and an experimental group (EG). The players of the EG wore a "weight shorts", with 300 gr of additional weight on each thigh, while they participated into 3 regular soccer training sessions per week, for 12 weeks. The CG followed the same training program without wearing the “weighted shorts”. Before and after 12 weeks of training, anthropometric characteristics, 10- and 30- m speed, the Arrowhead change-of-direction test, the Illinois agility test with ball, the countermovement jump, and the 5-repetition maximum (5RM) load at the split squat, leg extension and leg curl were measured. The EG improved significantly (p< 0.05) more in comparison with the CG in countermovement jump, leg extension and split squat (left leg) 5RM load. The addition of weights on the thighs using special shorts during soccer training sessions leads to increased jumping ability and lower limbs maximal strength in youth soccer players.

13

Gender Differences in Postural Stability Among Children

88%

Smith A., Ulmer F., Wong D.

Journal of Human Kinetics

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2012

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vol. 33

25-32

EN

This study aimed to examine the gender differences in postural stability among 8-12 year-old children. Twenty-six children participated in this repeated measures study to measure the centre of pressure (COP) under one normal condition (CONTROL: hard surface, eyes open, and looking straight ahead) and two challenging sensory conditions (ECHB: eyes closed and head back; and EOCS: eyes open and compliant surface) in randomized order. Girls had significantly lower COP path velocity (COP-PV, p < 0.05, medium effect), smaller radial displacement (COP-RD, p < 0.05, medium effect), and lower area velocity (COP-AV, p < 0.05, medium effect) as compared to boys when the three conditions were pooled. Gender differences were found in the percentage changes in COP-RD during ECHB (p < 0.05, large effect) and EOCS (p < 0.05, medium effect), and in COP-AV during both ECHB and EOCS conditions (p < 0.05, medium effect). Postural stability performance of girls had higher correlations with age (-0.62 vs. -0.40), body mass (-0.60 vs. -0.42), foot length (-0.68 vs. -0.45), and physical activity level (-0.45 vs. 0.02), as compared to boys. Girls had better postural stability than boys but were more affected by altered sensory input information. Girls are more capable of integrating their sensory inputs, whereas boys treat each sensory input somewhat separately and rely more on somatosensory feedback. Exercises such as standing on unstable surfaces with eyes open instead of eye closed and head back are more beneficial to children's postural stability control system.

14

The impact of antiepileptic drugs on the condition of the oral cavity in children and youth affected with epilepsy

88%

Mielnik-Błaszczak M., Skawińska A., Michałowski A., Błaszczak J., Książek K.

Polish Journal of Public Health

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2015

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vol. 125

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issue 2

110-112

EN

Introduction. Epilepsy is one of the most common neurological disorders. Epileptic patients taking antiepileptic pharmaceuticals often suffer from hypertrophic changes in gums. It is well established that dental hypertrophies within the alveolar tissue appear more often in children and young people being treated for epilepsy than adults. Aim. The aim of the study was to determine the influence of antiepileptic drug therapy on the oral cavity of both children and young people suffering from epilepsy. Material and methods. The investigation consisted of a clinical examination and a questionnaire looking at 107 individuals of both sexes, all aged between 6 and 18. They were all residents of the Lublin region. The study looked at the individuals residing in the Social Care Center in Lublin and patients treated at the Children’s Clinical Hospital in Lublin. The oral analysis included an examination of hard tissues, the state of oral hygiene according to Green and Vermillion (OHI-S), periodontal treatment needs (CPITN), status of gums and mucosal membrane pathological assessment of the oral cavity and determination of developmental disturbances of teeth (intensity of tooth decay expressed as DMFt). Results. The patients who took antiepileptic drugs had greater treatment needs in tissues of periodontium - determined by the value of CPITN index - (1.68±0.60), unlike those subjects who had not taken any medicine (0.96±0.29), (p=0.0001; Z=-3.20). It was stated that the value of the DMFt index had been significantly higher in those subjects who had been taking antiepileptic medicines (6.80±5.16), unlike the subjects not taking medicine (4.65±3.72), (p=0.02; Z=2.40). In subjects taking antiepileptic drugs, the OHI-S index was significantly higher (2.50) unlike those subjects who had not taken any medicine (1.53), (p=0.0001; Z=4.92). Conclusions. The findings demonstrate that the hard dental tissues in children taking antiepileptic drugs require much more care. They have a higher simplified index of oral hygiene and higher index for periodontal treatment needs. Disturbances related to oral mucosal cavity and dental abnormalities occurred more frequently in children ingesting antiepileptic agents

15

Youth Volunteering in Sport: A Case Study of The Benefits of “The European Voluntary Service” for a Sport Organization

75%

Esra Erturan-Ogut E.

Physical Culture and Sport. Studies and Research

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2014

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vol. 64

|

issue 1

71-85

EN

The European Voluntary Service of the European Union is thought to play a key role in promoting and encouraging volunteering among young people. Integrating the social work of EVS volunteers into activities through sport organizations is believed to help develop the perception of volunteering as an element of social commitment. The aim of this study is to therefore examine a case of youth volunteering practice in an EVS project in Turkey within the context of the benefits of volunteering. Data was collected using various tools. These included semi-structured interviews, participant observation (non-structured), and document analyses. Content analyses were applied to the interview data. The study established that the EVS is a beneficial channel for youth volunteering and provides benefits for each of the parties: the volunteers, the organization, and the sport participants.

16

REPEATED ACCELERATION ACTIVITY IN COMPETITIVE YOUTH SOCCER

75%

Barron D. J., Atkins S., Edmundson C., Fewtrell D.

Central European Journal of Sport Sciences and Medicine

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2016

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vol. 14

|

issue 2

55 - 61

EN

Soccer match-play is increasingly characterised by short, high-speed bursts reliant on the ability to accelerate. Performance is impaired after peak acceleration activity and during the second half and may compromise a player’s effectiveness. To date, information about repeated acceleration sequences is lacking but would provide further insight into high-speed activity during competition. This study examined repeated acceleration ability (RAA) using GPS (5 Hz) and accelerometer (100 Hz), during 14 competitive youth soccer matches from the 2014–2015 season. Results showed that RAA profiles were relatively homogeneous, and there were no significant differences between playing positions. RAA activity was also relatively stable between playing halves and only the activity of forwards declined significantly. In summary, this study suggests that RAA is a generic requirement of match-play at this level but presents a specific focus for conditioning regimens.

17

Strength Training and Detraining in Different Populations: Case Studies

75%

Marques M., Zajac A., Pereira A., Costa A.

Journal of Human Kinetics

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2011

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vol. 29A

|

issue Special Issue

7-14

EN

Many researchers have demonstrated that a specific strength training program can improve maximal strength and, the rate of force production, reduce the incidence of muscle-skeletal injury, and contribute to faster injury recovery times, thereby minimizing the number of missed practice sessions or competitions. Yet, to our best knowledge, there is no apparent consensus on the appropriate method of muscle strength and power training to enhance performance in distinct populations groups. Interruptions in training process because of illness, injury, holidays, post-season break or other factors are normal situations in any kind of sport. However, the detraining period and its consequences are not well reported in sports literature, and namely during puberty. Therefore, the aim of this paper was to discuss several case studies concerning different populations such us physical students, age-swimming competitors and elite power athletes.

18

A 15-year regional emergency department study of youth sport and recreational injuries

75%

Romanick M. A., Schuch T., Goodwin B. J., Hanson C., Caine D. J.

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EN

Purpose The aim of this study was to determine frequency and distribution of sports- and recreation-related injuries (SRIs) affecting children and adolescents who visited a northern tier regional medical center emergency department during a 15-year period. Material and methods A descriptive epidemiologic design was employed to retrospectively examine age, gender, month and year of injury, location of injury, sport/recreational activity, mechanism of injury, type and severity of injury, hospital admission and length of stay. Frequency of reported injuries were compared in categories of single factors using Chi-square tests of homogeneity. The impact of risk factors – gender, age class, and sport/activity – on incidence ratios were analyzed via Poisson regression. All statistical analyses were run in R. Results Findings heretofore unreported or inconsistent with previous emergency department (ED) studies include a peak injury occurrence of SRIs during September; a preponderance of head/neck injuries and fractures and a higher percent of admitted patients; frequent occurrence of ice hockey injuries; increased severity of injury during ages 10-14; and a trend during 2000-2014 showing increased injury rate of various types of recreational injuries. Findings consistent with previous ED studies included variable distribution of injuries by age, gender and sport/activity; increased frequency of SRIs during ages 12-15 years and during the warmer months of the year; and trends of increased frequency of SRIs affecting females, increased injury rate of closed head injuries, and decreased occurrence of bicycle injuries during the study period. Further to these findings, several suggestions are made to inform and guide local injury prevention efforts and further research. Conclusions Our study results provide information on a region-specific occurrence and distribution of SRIs in a northern tier hospital catchment area that can be valuable to guide regional injury prevention efforts and further research to evaluate specific patterns identified and success of prevention efforts.

19

The bilateral strength and power asymmetries in untrained boys

75%

Maly T., Zahalka F., Mala L., Cech P.

Open Medicine

|

2014

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vol. 10

|

issue 1

EN

The aim of the study was to identify the level of isokinetic strength and power of lower limbs in 13-year- old untrained boys (n=22, height: 158.5±8.0 cm, mass: 49.1±12.6 kg), to determine bilateral deficit between the limbs in the tests and examine their mutual relationship. Maximum peak muscle torque of knee extensors (PTQ) and flexors (PTH) on dominant (DL) and non-dominant leg (NL) were measured by isokinetic dynamometer. Three types of a vertical jump: countermovement jump with (CMJFA) and without arms (CMJ) and squat jump (SJ) were performed on two force platforms. We found the significant effect (p<.01) of independent vari- ables (knee extensors, flexors, AV) and their interaction on PT. AV did not indicate any significant effect on bilat- eral ratio of knee extensors (F4,84=.74, p>.05, ηp2=0.03), however a significant effect of AV was found in knee flexors (F4,84=2.70,p<.05, ηp2=.114). The type of jump had no effect on the difference between force exerted by DL and NL (F1,21=.102, p>.05, ηp2=.01). Bilateral deficit (Q:Q, H:H) did not significantly correlate with bilateral deficit in jumps (p>.05). Despite the possibility of identifying muscle asymmetries in the sense of strength imbalances, their mutual relation- ship with results in isokinetic dynamometry and power jump tests is still unclear.

20

Występowanie cech kofeinizmu u młodzieży i młodych dorosłych deklarujących częste spożycie bezalkoholowych napojów typu cola zawierających kofeinę

63%

Gustek S., Barcz M., Jaworski M.

Pediatria i Medycyna Rodzinna

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2011

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vol. 7

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issue 4

366-371

EN

Introduction: Over the past few years there has been a significant increase in consumption of caffeinated beverages, especially among children and adolescents. This trend is worrisome, and numerous studies point to the negative impact of excess supply of caffeine on various aspects of human functioning. In order to analyse this problem a proper study was conducted which aim was to assess the problem of addiction to caffeine among adolescents and young adults with particular emphasis on the characteristics of people declaring frequent consumption of soft beverages. Material and methods: Based on the review of literature about caffeinism authors constructed a questionnaire survey and identified the following inclusion criteria: 1) declaration of consuming soft beverages, 2) age 13-30 years. Diagnostic survey was conducted on a group of 118 people. Demographic variables were also controlled. Results: The most frequently declared potential symptoms of caffeinism were: headache, irritability and explosiveness, sleep problems, insomnia, palpitations and accelerated heartbeat, but these results differed within age groups. Conclusions: Excessive intake of soda products and exposure to high doses of caffeine can be an important environmental factor in the formation and maintezawierająnance of chronic diseases and addictions, also can be associated with poor dietary behaviours. Therefore it is important to prevent and rise awareness of children, adolescents and their parents about the dangers of excessive supply of products containing caffeine as well as further research on the effects of caffeine on the psychophysical functioning in this age group.

PL

Wprowadzenie: W ciągu ostatnich lat obserwuje się znaczny wzrost spożycia napojów zawierających kofeinę, szczególnie wśród dzieci i młodzieży. Tendencja ta jest niepokojąca, a liczne badania wskazują na negatywny wpływ nadmiernej podaży kofeiny na różne aspekty funkcjonowania człowieka. W celu głębszej analizy tego zjawiska przeprowadzono badanie własne i dokonano próby oceny problemu uzależnienia od kofeiny wśród młodzieży i młodych dorosłych ze szczególnym uwzględnieniem cech kofeinizmu u osób deklarujących częste spożycie napojów typu cola. Materiał i metodyka: Na podstawie przeglądu literatury dotyczącej kofeinizmu skonstruowano autorski kwestionariusz ankiety. Określono następujące kryteria włączenia do badania: 1) deklaracja o spożywaniu napojów typu coca-cola, 2) wiek 13-30 lat. W badaniu metodą sondażu diagnostycznego wzięło udział 118 osób. Dodatkowo kontrolowano także zmienne demograficzne, tj. wiek, płeć oraz wzrost i masę ciała. Wyniki: Najczęściej deklarowane przez respondentów potencjalne objawy kofeinizmu to: bóle głowy, drażliwość i wybuchowość, problemy ze snem, przyspieszona praca serca i palpitacje, przy czym symptomy te uzależnione były od wieku. Wnioski: Nadmierne spożycie produktów zawierających kofeinę może być ważnym czynnikiem środowiskowym w kształtowaniu i utrzymywaniu się chorób przewlekłych oraz uzależnień, a także wiązać się ze złymi zachowaniami żywieniowymi. Dlatego tak istotne są profilaktyka i zwiększanie świadomości dzieci, młodzieży oraz ich rodziców na temat szkodliwości nadmiernej podaży produktów zawierających kofeinę, a także dalsze badania nad wpływem kofeiny na funkcjonowanie psychofizyczne tej grupy wiekowej.

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Występowanie cech kofeinizmu u młodzieży i młodych dorosłych deklarujących częste spożycie bezalkoholowych napojów typu cola zawierających kofeinę