The aim of the study was to create and justify recommendations for differentiated development of speed abilities in young soccer players during in-depth specialization stage. We studied methods of estimation of speed abilities in soccer players, evaluated and analyzed speed abilities in young soccer players and elaborated recommendations on their differentiated development. Novelty of the idea is the separation of speed abilities into 9 manifestations for further development: speed of simple visual-motor reaction, speed of complex visual-motor reaction, speed of single movement, frequency of movement, speed of entire movement action, single explosive effort, start acceleration, distant speed (speed endurance), braking speed. Practical outcome is elaboration of set of exercise for differentiated development of speed abilities in young soccer players during in-depth specialization stage. Separate exercise complex was invented for each type of speed ability. These exercises may be used during the whole training process of soccer players. / Целью исследования является обоснование и разработка рекомендаций по дифференцированному развитию скоростных качеств у юных футболистов на этапе углубленной специализации. В результате исследования были изучены методики определения скоростных качеств у футболистов, проведена оценка скоростных качеств, анализ результатов и разработка рекомендаций по их дифференцированному развитию. Новизна исследования заключается в разделении скоростных качеств на девять проявлений для дифференцированного развития: скорость простой зрительно-моторной реакции, скорость сложной зрительно-моторной реакции, скорость одиночного движения, частота (темп) движений, скорость целостного двигательного действия, однократное проявление концентрированного взрывного усилия, стартовый разгон, дистанционная скорость (скоростная выносливость), скорость торможения (скорость остановки движения). Практическая значимость работы заключается в разработке комплекса упражнений с использованием различных средств и методов для дифференцированного развития скоростных качеств у футболистов на этапе углубленной специализации. Для каждого проявления скоростных качеств разработан свой комплекс упражнений. Данные упражнения можно использовать как в специальном микроцикле, направленном на развитие скоростных качеств, так и в повседневной тренировочной деятельности.

Thesis (PhD (Sport Science))--University of Stellenbosch, 2006. / Stress and coping are complex phenomena that are not always fully understood. They are psychological factors that impinge on individuals and people’s responses in dealing with them are described and interpreted in various ways. This study compared the coping strategies used by football players from ethnically diverse backgrounds. The aim was to explore the role that the environment, ethnicity and culture play in players' responses to stressful situations. A sample of 33 players was drawn from a professional club in the Professional Premier Soccer League in the Western Cape, Republic of South Africa. Subjects were representative in terms of race, age, years of experience and playing positions. Eleven black, coloured and white players for each group were selected for individual interviews. Their ages ranged between 15 and 32 years. An interpretive-qualitative research methodology was employed. Semistructured interviews and a biographical questionnaire were used as tools to gather information. The data were analyzed using interpretive analysis or the immersion crystallization method. The results revealed that football players were exposed to stress and there were differences and similarities in the way they conducted themselves. The similarities were recorded on matters related to match situations e.g., pressure to perform, inclusion in a starting line-up, and unruly behavior of supporters. Differences were cited on issues related to language, culture, financial matters, poor playing conditions, negative evaluation of the team by others, losing matches, referees' decisions and being away from home. These differences were found both between and within ethnic groups. Players' perceptions of stress showed that black players were experiencing more stress than the other two ethnic groups and white players were experiencing far less stress than the other two groups. Despite this finding, the majority of players reported to have been in control of stressful situations. The perception of lack of control was reported by black and coloured players only. It appeared that background experience of stressful events was producing greater psychosocial consequences for non-white players than white players. The football players used multiple strategies to cope with their sport challenges and there were both differences and similarities within and between the ethnic groups in the use of these strategies. Subjects used problem-focused coping, emotion-focused coping, passive coping, and avoidance coping in stressful situations. Problem-focused coping and emotion-focused coping were the dominant strategies employed by all three groups. Passive coping and avoidance coping were the lesser-used strategies and were employed by the three groups in situations where players felt that they could not exert control e.g., playing conditions or dubious referees' decisions. Self-criticism, not blaming others, adopting a negative approach, substance use/abuse and turning to religion were the strategies that appeared only in specific groups. This finding supports the hypothesis of differences in strategies related to differences in ethnic backgrounds. It was also revealed that football players were responding differently to stressful challenges that were presented at the different stages of the match. The dominant strategies used at the pre-match stage by the nonwhite group were: planning and preparation, relaxation, praying, focusing and concentration. At the same stage, white players used mostly focusing, concentration and planning. There were strong similarities between the groups in the use of these strategies. During the match stage, non-white players used active coping, positive approach, suppression of competitive activities, focusing and concentration. White players used similar strategies including emotional expression and mental disengagement. Different strategies were employed by players during the match stage, most of them being problem-focused strategies. In the post-match stage players used less-dominant coping strategies. Some strategies were used by players in all three ethnic groups and others appeared in specific groups only, e.g., substance use (coloured group) and passive thinking (white group). The study further revealed that coping strategies could be classified either as sport or non-sport related. A variety of sport-related strategies were found mostly during the pre-match and match stages. The nonsport related strategies appeared mostly during the post-match stage and were used mostly by non-white players. Concerning the processes involved in the selection of strategies, the study revealed that thought-out processes, automatic processes, influence of experience and a combination of processes were used to identify and select coping strategies. Processing of information was a preferred option used by the three groups of players to identify strategies and very few players used automatic processes. Between-group differences were found in the relationship between environmental background and previous experience and the players' selection of coping strategies. For black and coloured players this influence related mostly from factors outside their home environment. For white players it came from within their home situations. The study showed that factors that affected the players in selecting coping strategies, were both intrinsic and extrinsic. Intrinsic factors included personal safety and protection, performance, self-control and personal experience. Extrinsic factors included stress, influence of others, institutional influences, social background, pleasing others, family obligation, opponents and research. White players used intrinsic and extrinsic factors with equal frequency. Non-white players on the other hand, used fewer intrinsic factors than extrinsic factors. The results also showed that relatively less-experienced players were inclined to use achievement motivation as a determining factor. Black players were influenced by one other factor that did not appear in the other groups, that is, family obligations. Finally, exhaustion, cultural differences, language, absence of a family support structure, peer pressure, home circumstances, communication, diet, substance use/abuse, being in a new environment, personality differences and high expectations were identified as factors that restrict the use of coping strategy. Exhaustion and cultural differences appeared across all three groups. Group differences were however observed in language, absence of a family support structure, peer pressure, home circumstances, high expectations, and absence of compliments. These restrictive factors were experienced differently within and between the three ethnic groups and originated from exposure, challenges, and experiences that players encounter in their daily life situations.

Made available in DSpace on 2016-06-02T19:22:11Z (GMT). No. of bitstreams: 1 6251.pdf: 2137348 bytes, checksum: c2a00dd9baf672490949a036d79336a8 (MD5) Previous issue date: 2014-09-26 / Universidade Federal de Minas Gerais / Literature reports that genetic polymorphisms may determine important modulations on athletes phenotypes, such as height, cardiovascular adaptations, use of energy substrates as well as electrolyte and hormonal balance. It is possible that individuals who express the alpha actinin 3 gene (ACTN3; ancestral homozygous RR or heterozygous RX) may offer advantages in movements that require strength and fast twitch compared with individuals with XX genotype. ACTN3 is a sarcomeric Z line component, which is important for the actin filaments anchorage and myofibrillar arrangement maintenance. Regarding AMP deaminase (AMPD1) polymorphism, it has been reported that athletes with the mutant allele (allele T) may present disadvantages in intense and repetitive physical activities, since the enzyme encoded by this gene is responsible for the ATP resynthesis after intense muscle contractions. Polymorphisms in the angiotensin converting enzyme gene (ACE; deletion allele D) and angiotensinogen (AGT; mutated allele T) may favor athletes in activities requiring strength, due to the fact of higher Angiotensin (Ang) II circulating levels. The present study investigated whether polymorphisms in ACTN3, AMPD1, ACE and AGT genes, alone or in combination, may influence the hemodynamic and cardiac parameters as well as soccer players performance during physical tests such as jump, speed and endurance. Saliva from 220 young professional soccer players (14-20 years) from São Paulo Futebol Clube (Brazil) was collected. Then, total DNA was extracted from saliva and polymerase chain reaction (PCR) was used for genotyping of athletes. To provide more reliability to the study, athletes were also separated according to their age. Before this separation, the athletes with the mutation in the ACTN3 gene jumped lower heights in Squat Jump test (SJ) (RR/RX = 33.64 ± 5.31 vs XX = 30.81 ± 4.51 cm, p = 0.007), as well as in the Under (U)-15 (RR/RX = 34.88 ± 5.39 vs XX = 30.59 ± 4.07 cm, p = 0.04) and U- 17 (RR/RX = 35.82 ± 4.35 vs XX = 30.24 ± 5.16 cm, p = 0.01) categories. In the Counter Movement Jump test (CMJ), RR/RX jumped 37.26 ± 5.72 cm and XX 34.12 ± 4.84 cm (p = 0.005). In the U-17 category, RR/RX jumped 38.56 ± 5.69 cm and XX 32.90 ± 6.06 cm (p = 0.02). In the Counter Movement Jump with arms (CMJb) test, with all athletes, RR/RX jumped 43.85 ± 6.38 cm and XX 40.61 ± 5.06 cm (p = 0.009). The speed test (30 m) showed in the U-17 category that RR/RX were faster than the XX athletes (RR/RX = 4.13 ± 0.13 vs XX = 4.27 ± 0 17 s, p = 0.04). Regarding AMPD1 gene, no significant difference was found in the jumps and endurance tests, but in the speed test (10 m), CC athletes were faster than those with CT/TT genotypes (CC = 1.53 ± 0.19 vs CT/TT = 1.62 ± 0.16 s, p = 0.04). Athletes with DD genotype (ACE) jumped significantly higher in CMJb test compared with ID/II (DD = 44.37 ± 6.22 vs ID/II = 42.35 ± 6.23 cm, p = 0.02). In the U-17 category, DD athletes jumped higher in SJ (DD = 38.04 ± 5.00 vs ID/II = 33.16 ± 4.11 cm, p = 0.01), CMJ (DD = 41.03 ± 5.64 vs ID/II = 35.76 ± 4.26 cm, p = 0.01) and CMJb (DD = 48.62 ± 5.98 vs ID/II = 42.42 ± 4.81 cm, p = 0.007). In the endurance test, athletes from U-16 category with genotypes ID/II, traveled greater distances compared with DD (ID/II = 1.467 ± 63.70 vs DD =1.244 ± 64.25 m, p = 0.04). The DD genotype also favored athletes in speed test (30 m), either for players from U-14 category (DD = 4.29 ± 0.19 vs ID/II = 4.40 ± 0.16 s, p = 0.02) or for the U- 17 category (DD = 4.07 ± 0.15 vs ID/II = 4.20 ± 0.13 s, p = 0.04). AGT gene polymorphism did not influence the performance in the tests, but athletes with the mutant genotype (TT) showed greater left ventricle (LV) hypertrophy (114.6 ± 105.2 g/m2 for TT, 92.16 ± 18.88 g/m2 for MT and 94.78 ± 21.08 g/m2 for MM, p = 0.04) without any change in cardiac and other hemodynamic parameters. Greater LV hypertrophy (DD = 96.95 ± 19.96, ID = 90.14 ± 21.58 and II = 91.67 ± 21.09 g/m2, p = 0.04) and higher ejection fraction (DD = 71.73 ± 7.71, ID = 69.48 ± 6.51 and II = 68.59 ± 5.72 %, p = 0.02) were also found in the athletes with the DD genotype. The analysis of genes combination on athletic performance, when characteristics of strength and muscle fast twitch in the ranking by score were taken into account, showed that athletes with the highest scores (5-8) jumped higher than those with lower scores (1-4) in SJ test (score 5 to 8 = 33.80 ± 5.16 vs score 1 to 4 = 31.60 ± 5.22 cm, p = 0.01) and CMJ test (score 5 to 8 = 43.90 ± 6.85 vs score 1 to 4 = 41.87 ± 5.98 cm, p = 0.04). The present results suggest that RR/RX (ACTN3), DD (ACE) and CC (AMPD1) genotypes may benefit soccer players in activities requiring strength and fast twitch. In addition, ID/II genotypes seem to provide more resistance to athletes in endurance activity. In the future, the organization, standardization and ethical responsibility will be required in the management of these genetic markers for use in athletes training process. / Há relatos na literatura de que os polimorfismos genéticos podem determinar importantes modulações nos fenótipos dos atletas, como por exemplo, estatura, adaptações cardiovasculares, utilização dos substratos energéticos bem como balanço eletrolítico e hormonal. É possível que indivíduos que expressem o gene alfa actinina 3 (ACTN3; genótipos RR para homozigotos ancestrais ou RX para heterozigotos) possam apresentar vantagens em movimentos que exijam força e rápida contração muscular quando comparados aos indivíduos com genótipo XX. Isto pelo fato de a ACTN3 ser um componente da linha Z sarcomérica, o qual é importante para o ancoramento dos miofilamentos de actina e manutenção do arranjo miofibrilar. Com relação ao polimorfismo no gene AMP deaminase (AMPD1), tem sido relatado que os atletas que apresentam o alelo mutado (alelo T) possam apresentar desvantagens em atividades físicas intensas e repetitivas, uma vez que a enzima codificada por este gene é responsável pela ressíntese de ATP muscular após intensas contrações. Os polimorfismos nos genes da enzima conversora de angiotensina (ECA; alelo de deleção D) e angiotensinogênio (AGT; alelo T mutado) podem favorecer os atletas em atividades que requeiram força, isto por conta dos maiores níveis circulantes de Angiotensina (Ang) II. Este estudo investigou se os polimorfismos nos genes ACTN3, AMPD1, ECA e AGT, combinados ou não, podem influenciar nos parâmetros hemodinâmicos, cardíacos e no desempenho de jogadores de futebol em testes físico-motores tais como saltos, velocidade e endurance. Foi coletada a saliva de 220 jogadores jovens (14 a 20 anos) das categorias de base profissional do São Paulo Futebol Clube, Brasil. Em seguida, o DNA total foi extraído a partir da saliva e ensaios de reação em cadeia da polimerase (PCR) foram utilizados para a genotipagem dos atletas. Para conferir mais fidedignidade ao estudo, os atletas foram também separados de acordo com a idade. Antes desta separação, os atletas com a mutação no gene ACTN3 saltaram menos no teste Squat Jump (SJ) (RR/RX = 33,64 ± 5,31 vs XX = 30,81 ± 4,51 cm, p = 0,007), assim como nas categorias Sub-15 (RR/RX = 34,88 ± 5,39 vs XX = 30,59 ± 4,07 cm, p = 0,04) e Sub-17 (RR/RX = 35,82 ± 4,35 vs XX = 30,24 ± 5,16 cm, p = 0,01). No teste Counter Movement Jump (CMJ) os RR/RX saltaram 37,26 ± 5,72 cm e os XX 34,12 ± 4,84 cm (p = 0,005). Na categoria Sub-17, detectou-se que os RR/RX saltaram 38,56 ± 5,69 cm e os XX 32,90 ± 6,06 cm (p = 0,02). No teste Counter Movement Jump com os braços (CMJb), com todos os atletas, os RR/RX saltaram 43,85 ± 6,38 cm e os XX 40,61 ± 5,06 cm (p = 0,009). O teste de velocidade de deslocamento (30 m) revelou, na categoria Sub-17, que os RR/RX foram mais velozes que os atletas XX (RR/RX = 4,13 ± 0,13 vs XX = 4,27 ± 0,17 s, p = 0,04). Com relação ao gene AMPD1, nenhuma diferença significativa foi encontrada nos testes de saltos e endurance, porém no teste de velocidade de deslocamento (10 m), os atletas CC foram mais velozes comparados àqueles com genótipos CT/TT (CC = 1,53 ± 0,19 vs CT/TT = 1,62 ± 0,16 s, p = 0,04). Atletas com o genótipo DD (ECA) saltaram significativamente mais alto no teste CMJb comparados aos ID/II (DD = 44,37 ± 6,22 vs ID/II 42,35 ± 6,23 cm, p = 0,02). Na categoria Sub-17, os atletas DD saltaram mais nos testes SJ (DD = 38,04 ± 5,00 vs ID/II = 33,16 ± 4,11 cm, p = 0,01), CMJ (DD = 41,03 ± 5,64 vs ID/II = 35,76 ± 4,26 cm, p = 0,01) e CMJb (DD = 48,62 ± 5,98 vs ID/II = 42,42 ± 4,81 cm, p = 0,007). No teste de endurance, atletas da categoria Sub-16 com os genótipos ID/II, percorreram maiores distâncias comparados aos DD (ID/II = 1.467 ± 63,70 vs DD = 1.244 ± 64,25 m, p = 0,04). O genótipo DD do gene da ECA também favoreceu os atletas no teste de velocidade (30 m), pois jogadores da categoria Sub-14 com o referido genótipo foram mais velozes comparados aos ID/II (DD = 4,29 ± 0,19 vs ID/II = 4,40 ± 0,16 s, p = 0,02). O mesmo pôde ser visto para a categoria Sub-17 (DD = 4,07 ± 0,15 vs ID/II = 4,20 ± 0,13 s, p = 0,04). O polimorfismo no gene AGT parece não influenciar o desempenho nos testes propostos, porém atletas com o genótipo mutado (TT) apresentaram maior hipertrofia do ventrículo esquerdo (VE; 114,6 ± 105,2 g/m2 para TT; 92,16 ± 18,88 g/m2 para MT e 94,78 ± 21,08 g/m2 para MM, p = 0,04), sem qualquer outra alteração nos outros parâmetros cardíacos e hemodinâmicos. Maior hipertrofia do VE (DD = 96,95 ± 19,96; ID = 90,14 ± 21,58 e II = 91,67 ± 21,09 g/m2, p = 0,04) e maior fração de ejeção (DD = 71,73 ± 7,71; ID = 69,48 ± 6,51 e II = 68,59 ± 5,72 %, p = 0,02) também foram encontradas nos atletas com o genótipo DD. A análise da combinação dos genes no desempenho dos atletas, quando se privilegiaram as características de força e explosão muscular no ranqueamento por escore, revelou que os atletas com os escores mais altos (5 a 8) saltaram mais comparados àqueles com escores mais baixos (1 a 4) no teste SJ (Escore 5 a 8 = 33,80 ± 5,16 vs Escore 1 a 4 = 31,60 ± 5,22 cm, p = 0,01) e no teste CMJ (Escore 5 a 8 = 43,90 ± 6,85 vs Escore 1 a 4 = 41,87 ± 5,98 cm, p = 0,04). Os resultados do presente estudo sugerem que os genótipos RR/RX (ACTN3), DD (ECA) e CC (AMPD1) podem beneficiar os jogadores de futebol em atividades que requeiram força e rápida contração muscular. Além disso, os genótipos ID/II parecem proporcionar mais resistência aos atletas em atividade de endurance. Para o futuro, serão necessárias organização, padronização e responsabilidade ética no manejo desses dados genéticos para a utilização no processo de formação de atletas.

The purpose of the current study was to examine the Psychological Intervention Strategies (PIS) that are used by coaches for male soccer teams in South Africa to enhance the performance of the national soccer teams. National soccer coaches for male teams (n = 4) completed a questionnaire and attended in-depth interview. Results from both the questionnaire and in-depth interview revealed a lack of knowledge of PIS which was further supported by the data from the analysis. While some of the coaches did not utilise goal setting and relaxation in their coaching responsibilities, the current results further show that these soccer coaches do not utilise mental imagery as well. These results suggest that the SAFA soccer coaches could not integrate PIS in the coaching. Although the results cannot be generalised there is evidence that the SAFA trained soccer coaches demonstrate inadequacy in using PIS in their soccer coaching. The study finds that soccer coaches are psychologically under-prepared for their arduous task of soccer coaching. By implication the players are also mentally under-prepared that they cannot face their peers competitively. Current studies point to this psychological preparedness as the psychological momentum.

Idrottande ungdomar gör inte alltid hälsosamma matval och rätt näring är en förutsättning för att orka de fysiska kraven som ställs på fotbollsspelare. Syftet med studien var att kartlägga kostvanor hos ungdomar på fotbollsgymnasium och jämföra resultaten med Svenska Olympiska Kommitténs kostrekommendationer. Studien var kvantitativ och en webbenkät användes som datainsamlingsmetod. Enkäten omfattade kostvanor, livsmedelsval samt kost i samband med prestation och besvarades av 132 deltagare varav 100 svar analyserades. Data analyserades med deskriptiv statistik. Studiens resultat visade att majoriteten av ungdomarna har en regelbunden måltidsordning avseende frukost, lunch, middag och mellanmål, däremot har de mindre kännedom om måltidsplanering och vad som bör intas efter träning. Resultatet visar också att mättat fett är det dominerande intaget av fettkälla hos deltagarna och en stor önskan om minskat intag av mättat fett, sötsaker och snabbmat finns. Resultatet av denna studie utgör ett underlag av råd och riktlinjer kring kost för unga fotbollsspelare och kan vara ett användbart verktyg och stöd för hälsovägledare, lärare, tränare och föräldrar. / Athletes do not always make healthy food choices meanwhile the right nutrition is prerequisite to meet the physiological commands of a soccer player. The purpose of the study was to investigate dietary habits of young people at soccer gymnasiums and compare the results with the Swedish Olympic Committee's dietary recommendations. The study was quantitative and a web survey was used as a data collection method. The questionnaire was made to collect information regarding the respondents' dietary habits, food choices, and diet in connection with performance and was answered by 132 participants, of whom 100 responses could be analyzed. Data was analyzed with descriptive statistics. The results of the study show that the majority of young people have a regular meal arrangement for breakfast, lunch, dinner and snacks. However, they have less control over timing and what should be taken after training. In addition, the study also showed that saturated fat is popular among the participants and that they have a great desire for reduced intake of saturated fat, sweets and fast food. In conclusion, the result of this study is a basis for advice and guidelines on diet for soccer youths and can be a useful tool and support for health counselors, teachers, trainers, and parents.

La present tesi exposa una investigació amb l'objectiu de dissenyar un protocol de intervenció per a promoure la esportivitat i el fai play en futbolistes cadets de Mallorca, revisats els principals estudis que situen l'objecte d'estudi en la promoció de la esportivitat mitjançant intervención es planteja una intervenció bassada en l'assessorament a entrenadors, jugadors i pares de jugadors de futbol cadets, els instruments utilitzats son el SVQ, per mesurar valors, el EAF per mesurar actituds i el IOFF per mesurar comportaments.Els principals resultats de la investigació son que la intervenció dissenyada ha estat efectiva per a millorar les comportaments relacionats amb el fairplay, no així per les actituds i consegueix que els valors es considerin com a més importants.La principla conclusió és que l'esport en edat escolar és un contexte obert que la seva connotació educativa depen de la intencionalitat de l'acció i de que sence una intervenció específica per a millorar la esportivitat aquesta millora no es produeix per si mateixa. / This Thesis presents an investigation with the objective of designing a educational intervention for promoting sportpersonship amogn young soccer players in Mallorca, once reviewed the principla investigations in interventions to promote sportpersonship amd fairplay there is the design of an intervention in coaches, players and their parents. The investigation tools were SVQ for measuring values, EAF for measuring attitudes and IOFF for measuring behaviours. Main results show that the intervention was positive among the behaviours, nor for the attitudes and the values are measured as more importants. The main conclusion show that sport in young ages is an open context and the educational value of the sport depens on the intention of the action and without an specific intervention to promote sportpersonship there are no evident results.