O crescimento fisico e estado nutricional sao considerados excelentes indicadores de saude, ao permitir o estabelecimento de padroes de monitoramento do desenvolvimento, principalmente de escolares. O estudo objetivou comparar o perfil de crescimento e estado nutricional de escolares em dois momentos 1997 e 2009. Os dados do crescimento fisico e do estado nutricional da amostra atual foram 645 escolares (270 do sexo masculino e 375 do sexo feminino). Foi utilizada a adequacao IMC/Idade, utilizando-se como padrao de referencia as curvas de crescimento da Organizacao Mundial da Saude (OMS). Embora nao tenham sido verificadas diferencas estatisticamente significativas nos indicadores estatura e massa corporal dos escolares, foi possivel observar uma tendencia de aumento destas variaveis entre as duas amostras e em ambos os sexos. Em relacao a adequacao do IMC, observou-se um aumento no percentual de rapazes com IMC baixo para a idade, a duplicacao do percentual de obesos e uma reducao no percentual de sujeitos com sobrepeso. No grupo feminino, percebeu-se um aumento na quantidade de individuos com Baixo Peso, Sobrepeso e Obesidade e um decrescimo no numero de escolares com IMC adequado para idade. Pode-se concluir que os indicadores de crescimento fisico (peso, estatura e IMC) nao apresentaram mudancas significativas no periodo de tempo compreendido entre as duas amostras (1997 e 2009). No entanto, foi possivel verificar uma tendencia para incremento na estatura, na massa corporal e no numero de sujeitos com Risco para Obesidade e Obesidade, principalmente no sexo feminino.
Physiotherapists often use deep-water exercises, combining movements under and above water.The purpose of this study was to examine the range of motion, peak velocity, phase duration and smoothness coefficient in dual-media shoulder abduction performed in deep water with different buoyancy aids and compare dominant and non-dominant upper limbs.Ten healthy right-handed and experienced participants (five men and five women, age 30.1 ± 9.4 years, BMI 21.8 ± 2.8), performed the upper limb abduction movements at maximum speed in three conditions: no aided buoyancy, pool noodle and buoyancy belt.Biomechanical components at the upper limb endpoint (third finger) were determined using a movement capture system (Qualisys, Gothenburg, Sweden).Gender interaction was not significant for any variable.Comparing dominant and non-dominant upper limbs, the results showed differences in the underwater phase for the range of motion (without buoyancy aid t = -0.60;pool noodle t = 0.10; buoyancy belt t = -2,18), in phase duration (without buoyancy aid t = 0.42; pool noodle t = -0.75;buoyancy belt t = 0.15) and in the smoothness coefficient (without buoyancy aid t = 1.89), similar to the transition phase.When comparing the fluctuation conditions for each upper limb, the results show differences in above water phase in peak velocity with no aided buoyancy vs. the buoyancy aid, buoyancy belt (non-dominant limb, t = 0.04) and in the transitional phase for range of motion for no buoyancy aid vs. the buoyancy aid, buoyancy belt in both upper limbs (dominant limb, t = 2.08; non-dominant limb, t = 2.40) and phase time in the non-dominant limb (t = -0.04).In sum, the range of motion and peak velocity indicate the buoyancy belt as the best option for shoulder abduction with optimal symmetry between dominant and non--dominant upper limbs for the different phases of dual media in sessions performed in deep water.
We compared the hydrodynamic characteristics and pull-out strategies of four backstroke-to-breaststroke turning techniques in young swimmers. Eighteen 11 and 12-year-old swimmers participated in a 4 week intervention program including 16 contextual interference sessions. The hydrodynamic variables were assessed through inverse dynamics, and the pull-out strategy kinematics were assessed with tracking markers followed by 12 land cameras and 11 underwater cameras. Swimmers randomly completed sixteen 30 m maximal backstroke-to breaststroke-open, somersault, bucket and crossover turns (four in each technique) with a 3 min rest. The data showed higher drag force, cross-sectional area and drag coefficient values for the first (compared with the second) gliding position. The crossover turn revealed the highest push-off velocity (2.17 ± 0.05 m·s-1), and the somersault turn demonstrated the lowest foot plant index (0.68 ± 0.03; 68%), which could have affected the first gliding, transition and second gliding depths (0.73 ± 0.13, 0.86 ± 0.17 and 0.76 ± 0.17 m). The data revealed the consistency of the time spent (4.86 ± 0.98 s) and breakout distance (6.04 ± 0.94 m) among the four turning techniques, and no differences were observed between them regarding time and average velocity up to 7.5 m. The hydrodynamic characteristics and pull-out strategy of the backstroke-to-breaststroke turns performed by the age group swimmers were independent of the selected technique.
In order to verify whether there is a considerable increase in body skin temperature during different swimming techniques (crawl and backstroke) and identifying the most affected regions. The athlete's thermal symmetry was also analyzed, as well as its modification after the swimming, according to the performed technique. The accuracy of thermography as a method to identify and distinguish these different styles was also evaluated. Ten male swimmers were recruited and two different swimming techniques were assessed, crawl and backstroke. After a 10 minute acclimatization period in the pool, the swimmers were quickly dried with microfiber towels. The thermograms were taken before and after the swimming task, which consisted in a 7x200m protocol in crawl or backstroke. Infrared thermography revealed an increase of temperature after exercise and no significant differences were found between both techniques. Thermal symmetry was not affected by exercise.
The Psycical Education (PE) in schools has the aim of introducting and integrating the student corporally and in movement. When the students find in those classes the satisfaction of such learning and take this knowledge outside of the school, there is the success. On this subject, there is the aim of identifying the profile of students who take part in the Physical Education classes, as well as pointing out their perception concerning these classes. It was carried out a Survey descriptive campus study, considering the probabilistic sample with conglomerates, composed by 496 students, using Darido’s (2004) adapted questionnaire. The results were transcribed and assessed through the descriptive and inferencial statistics (chi-squared), with the significance level of 0,05. Among the variety of results, it was depicted that the students practice sports, take part in the classes, and feel themselves satisfied: however, suggest varying a little the contend of these classes, inserting different sports, and ludic activities, including Physical Education and Health related themes.
The Psycical Education (PE) in schools has the aim of introducting and integrating the student corporally and in movement. When the students find in those classes the satisfaction of such learning and take this knowledge outside of the school, there is the success. On this subject, there is the aim of identifying the profile of students who take part in the Physical Education classes, as well as pointing out their perception concerning these classes. It was carried out a Survey descriptive campus study, considering the probabilistic sample with conglomerates, composed by 496 students, using Darido’s (2004) adapted questionnaire. The results were transcribed and assessed through the descriptive and inferencial statistics (chi-squared), with the significance level of 0,05. Among the variety of results, it was depicted that the students practice sports, take part in the classes, and feel themselves satisfied: however, suggest varying a little the contend of these classes, inserting different sports, and ludic activities, including Physical Education and Health related themes.
O surf moderno vem sendo descrito como uma atividade fisica intermitente, que varia em duracao e intensidade, seguida de periodos de recuperacao consideraveis. Atualmente, a analise e avaliacao das sessoes de surf sao baseadas em conhecimento empirico, experiencia e observacao. Em outras palavras, procedimentos que envolvem grandes erros de medicao. No entanto, e extremamente dificil obter informacoes analiticas sobre os parâmetros de desempenho. As primeiras investigacoes cientificas no mundo do surf enfrentam uma dificuldade classica do mundo da ciencia, que e medir sem interferir. Alem disso, o ambiente maritimo, particularmente devido a agua salgada, e extremamente hostil aos componentes eletronicos, que atualmente sao a nossa maior fonte de informacoes quantitativas.O objetivo desta pesquisa foi investigar a fase horizontal do surf, especificamente a remada de potencia, a remada de longa duracao e a tecnica de transicao para ficar de pe na prancha de surf. Todo este pacote sob a perspetiva da biomecânica, associado a alguns parâmetros bioenergeticos. A abordagem geral foi apoiada por um processo de desconstrucao dos movimentos e tecnicas em partes didaticas, a fim de reconstruir um conhecimento global e uma melhor compreensao do surf. Olhando para o futuro, agregamos a este projeto o desenvolvimento de recursos tecnologicos que possibilitam explorar o surf diretamente no oceano. Tudo isso ganha ainda muito mais peso, desde que o Surf foi selecionado como novo desporto olimpico para os Jogos de Toquio, em 2020. Os Jogos Olimpicos passam a ser uma excelente oportunidade, onde o surf se tornara mais profissionalizado e organizado. Neste contexto, as metricas para avaliacao de desempenho sao importantes para ajudar a validacao de metodologias de ensino-aprendizagem, treinamento e julgamentos competitivos.Palavras-chave: biomecânica do surf, surfing, remadas do surf, ficar de pe, medicoes.