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BACKGROUND: Sports practice during adolescence is important to enhance bone development, although it may provide different effects depending on the mechanical impact present in the sport. Besides, resistance training (RT) may also induce bone changes directly (via muscle contractions) and indirectly (via myokines). However, there have been no studies analyzing the longitudinal influence of engaging in sport with and without added mechanical load. Thus, this study aims to analyze the combined effects of sports participation and resistance training on areal bone mineral density (aBMD) accrual in adolescent athletes participating in swimming and impact sports for 12-months. METHODS: This was a 12-month longitudinal study. The sample comprised 91 adolescents (21 females) aged 10 to 18 years, engaged in impact sports (basketball, tennis, track & field, baseball and gymnastics, n = 66) and non-impact sport (swimming, n = 25). The sample was divided according to resistance training participation: impact sports only (n = 45), impact sports + resistance training (n = 21), swimming-only (n = 17) and swimming + resistance training (n = 8). aBMD and soft tissues were measured using dual-energy X-ray absorptiometry. Generalized linear models analysis was used for the resistance training (RT) x type of sport interaction in predicting aBMD changes overtime, adjusting for maturation, sex and baseline aBMD. RESULTS: After 12-months, all groups showed a significant increase in aBMD, except for the swimming groups (regardless of resistant training), which showed a significant loss in spine aBMD (-0.045 [-0.085 to -0.004] g/cm2 in swimming-only and - 0.047 [-0.073 to -0.021] g/cm2 in swimming + RT). In comparisons between groups, only swimming + RT group, compared with swimming-only group presented higher upper limbs aBMD (0.096 g/cm2 [0.074 to 0.118] in swimming + RT vs. 0.046 [0.032 to 0.060] g/cm2 in swimming only; p < 0.05) and whole body less head (WBLH) aBMD (0.039 [0.024 to 0.054] g/cm2 in swimming + RT vs. 0.017 [0.007 to 0.027] g/cm2 swimming-only; p < 0.05). CONCLUSION: Despite the significant gain in aBMD in all groups and body sites after 12-months, except for the spine site of swimmers, the results indicate that participation in RT seems to improve aBMD accrual in swimmers at the upper limbs and WBLH.

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Combat sports, such as Brazilian Jiu Jitsu (BJJ), require intense physical, mental, and emotional tasking within its training. With the degree of difficulty ingrained within the sport, many participants that once were intrigued by the sport may lose this interest and enjoyment if their goals are not met. The purpose of this study was to examine the relative strength of sport motivations among BJJ players. Participants included 228 BJJ athletes varying in levels of sport participation experience. Grounded in Self-Determination Theory, participants were assessed on five motives for sport participation including: fitness, appearance, competence, social, and interest/enjoyment. Motives related to interest/enjoyment, competence, and fitness, were rated relatively higher; and appearance and social were rated relatively lower regarding participants' motivation for BJJ participation. Analyses were also conducted related to athletes' years of experience and competitive level of participation (i.e., hobbyist or non-competitor to those who compete on a regular basis) There was a significant effect of competence and interest/enjoyment motivators among competitive BJJ players, regardless of years of experience in the sport. Findings from this study could aid coaches, sport clinicians, and sport psychologists in working with BJJ players by focusing their training on the motivators that are most appealing to these athletes.

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ABSTRACT Background: Sports participation motivations can be intrinsic, extrinsic, or even amotivational. Few studies on adult participation in PA have been found in the Lebanese context. This study aims to: a) investigate significant differences in sports participation motivation across gender, age, occupation, and time of practice, and b) investigate sports participation motives that discriminated the best between those variables. Material and methods: The Arabic version of the Sport Motivation Scale was collected electronically from 531 volunteers practicing regular PA for the last six months. Gender, occupation, marital status, and time of practice were all analyzed using Mann-Whitney U test and the Kruskal Wallis Test with 0.05 as level of significance. Results: Internal motivation subscales (particularly the intention to accomplish) were the most influential motives for both genders. A significant difference across gender was reported in the extrinsic motivation and amotivation subscales. Furthermore, age, occupation, marital status, and time of practice show significant differences in motivation factors either dependent or regardless of gender distribution (p<0.05). Conclusion: no significant differences in the intrinsic motivation for sports participation between genders. Other factors, on the other hand, had a substantial impact. Research contribution: these findings are intended to contribute to a better understanding of differences in motivation for participating in PA and to aid in its promotion among Lebanese adults

RESUMO Contexto: As motivações para a participação desportiva podem ser intrínsecas, extrínsecas ou mesmo amotivacionais. Poucos estudos sobre a participação de adultos em AF foram encontrados no contexto libanês. Este estudo tem como objetivos: a) investigar diferenças significativas na motivação para a prática desportiva em função do género, idade, profissão e tempo de prática, e b) investigar os motivos da prática desportiva que melhor discriminaram entre essas variáveis. Material e métodos: A versão árabe da Sport Motivation Scale foi coletada eletronicamente de 531 voluntários praticantes regulares de AF nos últimos seis meses. Gênero, ocupação, estado civil e tempo de atuação foram analisados por meio do teste U de Mann-Whitney e do teste de Kruskal Wallis com nível de significância de 0,05. Resultados: As subescalas de motivação interna (particularmente a intenção de realizar) foram os motivos mais influentes para ambos os sexos. Uma diferença significativa entre os gêneros foi relatada nas subescalas de motivação extrínseca e amotivação. Além disso, idade, ocupação, estado civil e tempo de prática mostram diferenças significativas nos fatores de motivação dependentes ou independentes da distribuição por gênero (p<0,05). Conclusão: não houve diferenças significativas na motivação intrínseca para a prática desportiva entre os sexos. Outros fatores, por outro lado, tiveram um impacto substancial. Contribuição da pesquisa: esses achados pretendem contribuir para uma melhor compreensão das diferenças na motivação para participar da AF e auxiliar na sua promoção entre adultos libaneses.

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The purpose of this study was to examine the training habits of eumenorrheic active women during their menstrual cycle (MC), and its perceived influence on physical performance regarding their athletic level. A group of 1250 sportswomen filled in a questionnaire referring to demographic information, athletic performance and MC-related training habits. Of the participants, 81% reported having a stable duration of MC, with most of them (57%) lasting 26-30 days. Concerning MC-related training habits, 79% indicated that their MC affects athletic performance, although 71% did not consider their MC in their training program, with no differences or modifications in training volume or in training intensity for low-level athletes (LLA) and high-level athletes (HLA) with hormonal contraceptive (HC) use. However, LLA with a normal MC adapted their training habits more, compared with HLA, also stopping their training (47.1% vs. 16.1%, respectively). Thus, different training strategies should be designed for HLA and LLA with a normal MC, but this is not so necessary for HLA and LLA who use HC. To sum up, training adaptations should be individually designed according to the training level and use or non-use of HC, always taking into account the pain suffered during the menstrual phase in most of the athletes.

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ABSTRACT The purpose of this study was to investigate the association between Sport Participation (SP) and Motor Competence (MC) in school-age children, and to assess the mediation role of Body Mass Index (BMI) on this association. 707 children (332 boys, 375 girls) aged between 6- to 10 years participated in the study. Motor competence was determined using the Bruininks-Oseretsky Test of Motor Proficiency (BOT-2). Parents were asked about organized SP, categorized as 1) no participation, 2) partial participation and 3) consistent participation, and BMI was calculated based on the child's height and weight. The results indicated significant differences for all MC components and total score for SP categories, all p < .05, with higher results for consistent participation in sports. For BMI, significant differences occurred in all components, with the exception of fine manual control and manual coordination. Our findings showed that SP was associated with MC, and BMI was not an important factor in these relationships. However, a small mediation of BMI was found, but only for obese children. In summary, we conclude that sport participation plays a relevant role in the development of motor competence in school-age children, and that association is, in general, not mediated by weight status.

RESUMO O objetivo deste estudo foi investigar a associação entre Participação Esportiva (PE) e Competência Motora (CM) em crianças em idade escolar e avaliar o papel da mediação do Índice de Massa Corporal (IMC) nesta associação. Foram avaliadas 707 crianças (332 meninos, 375 meninas) com idades entre 6 e 10 anos participaram do estudo. A competência motora foi determinada usando o Teste Bruininks-Oseretsky de Proficiência Motora (BOT-2). Os pais foram questionados sobre a SP organizada, categorizada como 1) sem participação, 2) participação parcial e 3) participação consistente, e o IMC foi calculado com base na altura e no peso da criança. Os resultados indicaram diferenças significativas para todos os componentes do CM e escore total para as categorias de PS, todos p <0,05, com resultados mais altos para a participação consistente nos esportes. Para o IMC, ocorreram diferenças significativas em todos os componentes, com exceção do controle manual e da coordenação manual. Nossos achados mostraram que a SP estava associada à CM, e o IMC não foi um fator importante nessas relações. No entanto, uma pequena mediação do IMC foi encontrada, mas apenas para crianças obesas. Concluímos que a participação esportiva desempenha um papel relevante no desenvolvimento da competência motora em crianças em idade escolar, e essa associação, em geral, não é mediada pelo status de peso.

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Abstract Aims: To investigate elite women sports career development can be a way to better understand how gender issues and specific women sport practice conditions have influenced athletes' life and personal experiences, also subside reflections on policies and pedagogic intervention on the sport. The aims of this study were to investigate and describe the process of sports career development lived by Brazilian women elite futsal players, based on their own sport experiences and perspectives on futsal. Methods: Data of this qualitative study were produced by semi-structured retrospective interviews with 13 Brazilian elite women futsal players. Data gathering and data analysis were based on the Grounded Theory method. Results: This section is organized in four axes, with their main categories in parenthesis: 1.Diversified experiences in childhood and youth (enjoyment related to diversified sport practices); 2.Initiation on 'kicking ball games' practices (experiences with football and futsal informal practices and suffering of prejudice related to gender issues); 3.Systematic participation in futsal practices (experiences in systematic futsal practices within older age groups); 4.The investment on elite futsal career (moving from football to futsal career). Conclusion: Interviewed players had their first sports experiences on a variety of practices during sport initiation in childhood. The beginning on systematic practice of futsal occurred later than men athletes. The lack of competitions for young girls, and the fact that futsal and other 'ball kicking games' are considered as men preserve practices contributed to the late sport specialization process. The athletes' career presented strong thresholds related to gender issues on futsal.

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Youth sporting activities have been explored as a way to impact positive personal transformation and development, glaringly demonstrated by world-wide investments in public policies, programs, and projects. We studied positive effects of participation in sports on the developmental assets of 614 adolescents (13.1 ± 1.7 years) actively engaged in extracurricular sport programs targeted at socially disadvantaged youths, from five municipalities across five states of the southern, south-eastern and north-eastern regions of Brazil. Participants responded to a developmental assets questionnaire designed to capture sociodemographic and human development data. Multilevel logistic regression was used to explore associations between years of participation in sport and human development indicators, controlling for age and sex. Our results showed that the quality of the young people's support network and duration of program participation positively influenced sport participation, which, in turn, was associated with willingness to learn. A strong association was also observed between sport participation and developmental assets. Thus, we offer new evidence of a relationship between positive development and environmental factors in which individual and contextual forces can be aligned, and we provide new reference data for developing countries.

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The present study examined extracurricular sport participation variables and developmental context in relationship to perceived self-efficacy among underserved adolescents. Participants ( n = 821, 13.6 ± 1.5 years) completed the Youth Experience in Sport questionnaire and General Self-Efficacy Scale. We used the Human Development Index (HDI) to characterize developmental contexts. Multilevel regression models were used to explore the relative contributions of age, sex, years of participation in extracurricular sport, HDI, and perceived positive experience in sport. Our results highlight that positive experience alone and in interaction with length of participation in the program fostered perceived self-efficacy. Participants from higher HDI contexts remained longer in the program. An implication of our research is that variables linked to positive sport experiences and perceived self-efficacy can be used as markers to evaluate the outcomes and impact of sport participation programs aimed at promoting positive youth development.

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The aim of this study is to learn more about the physical activity habits of participants in a popular sporting event such as European Sports Day, which is held simultaneously in five European countries (Spain, Italy, Cyprus, Ireland, and Hungary), and to measure the influence of socio-demographic variables on these habits. This is a cross-sectional study conducted with a sample of 856 participants, stratified by gender, age, and nationality. We statistically analyzed five variables related to physical activity habits: frequency of physical activity practice, places of practice, motives of practice, perceived fitness level, and popular event attendance. Of the participants, 76.8% said they perform physical activity weekly. Fitness/health improvement (34.63%) and entertainment/leisure (26.52%) are the main reasons for the practice of physical activity. Age and nationality are differentiating factors on physical activity habits...

"Hábitos de atividade física em um evento do European Sports: Um estudo de caso."O objetivo deste estudo foi determinar os hábitos dos participantes de um evento popular como o Dia Europeu do Desporto realizado simultaneamente em cinco países europeus (Espanha, Itália, Chipre, Irlanda e Hungria), e medir a influência das variáveis ​​sociodemográficas sobre esses hábitos. Este é um estudo transversal, composto por uma amostra de 856 participantes, estratificada por sexo, idade e nacionalidade. Foram analisados ​​estatisticamente cinco variáveis ​​relacionadas aos hábitos de atividade física: frequência de atividade física, local de práticas, motivações para a prática, nível de condicionamento físico percebido, e frequência de participação em eventos populares. Dos participantes, 76,8% disseram que se envolver em atividade física semanal. Melhorar fitness/saúde (34,63%) e entretenimento (26,52%) foram os principais motivos para a prática de atividade física. Idade e nacionalidade são um fator de diferenciação sobre os hábitos de atividade física...

"Hábitos de actividad física en un evento deportivo europeo: Un estudio de caso." El objetivo de este estudio es conocer los hábitos de actividad física de los participantes en un evento popular como el Día del Deporte Europeo, que se celebra simultáneamente en cinco países europeos (España, Italia, Chipre, Irlanda y Hungría) y medir la influencia de las variables sociodemográficas sobre esos hábitos. Este es un estudio transversal compuesto por una muestra de 856 participantes, estratificados por género, edad y nacionalidad. Se analizaron estadísticamente cinco variables relacionadas con los hábitos de actividad física: frecuencia de práctica de actividad física, lugar de práctica, motivaciones de práctica, nivel de condición física percibido y frecuencia de asistencia a eventos populares. De los participantes, el 76,8% aseguraron que realizaban actividad física semanalmente. Mejorar la condición física/salud (34,63%) y el ocio y entretenimiento (26,52%) son las principales razones para la práctica de actividad física. Edad y nacionalidad son un factor diferenciante sobre los hábitos de actividad física...

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Pretendeu-se examinar as influências contextuais e sócio-ambientais nas atitudes e comportamentos dos jovens na sua participação desportiva. Participaram 24 jovens jogadores de futebol de um Clube de Orientação Profissional (COP), divididos em quatro escalões dos sub 14 aos sub 17. Participaram em entrevistas de grupo sobre a sua participação desportiva, caracterização do contexto de prática e relações interpessoais. O clima de grupo, entre os pares, foi positivamente referido pelos jovens como importante. A procura de estatuto e reconhecimento, a par da aspiração ao profissionalismo foi referido como importante no trajeto desportivo. Os pais são importantes agentes na participação desportiva e a relação do jovem com o treinador mostrou-se influente no clima motivacional percepcionado pelos jovens. Os resultados determinam importantes ativos a ter em consideração na construção da estrutura de treino em jovens inseridos em clubes profissionais. A participação desportiva dos jovens atletas precisa ter em consideração o contexto de prática de forma a promover um desenvolvimento positivo.

It was intended to examine the contextual influences and socio-environmental attitudes and behaviors of young athletes in sport participation. The participants were 24 young soccer players in a Professional Oriented Club (POC), divided into four teams, sub 14 through sub 17; they participated in group interviews regarding their sport participation, characterization of the context of practice and interpersonal relationships. The group climate, among peers, was positively mentioned by young athletes’ as important. The search for status and recognition, alongside with the aspiration to professionalism were stated as important in their sport trajectories. Parents are important agents in sport participation. The relationship with the young coach proved to be influential in the motivational climate perceived by young people. The results determine important assets to take into consideration when construing the training structure in youngsters playing in professional clubs. Young athletes’ sport participation needs to take into account the context of practice to promote positive development.

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