Sociocultural factors related to the physical activity in boys and girls

OBJECTIVE: To verify in male and female Brazilian adolescents the association of demographic, psychosocial, behavioral and sociocultural characteristics with the regular practice of physical activity. METHODS: The sample consisted of 109,104 adolescents from all Brazilian states attending the 9th year of elementary education in 2012. The response variable was the regular practice of physical activity (300+ minutes/week). The explanatory variables were grouped into four fields: demographic, psychosocial, behavioral and sociocultural. The Poisson regression was stratified by sex to evaluate the association. RESULTS: The prevalence of active adolescents was 20.2%, higher in boys (27.9%) than in girls (13.1%). It was observed a greater practice of physical activity in boys of lower age group, children of mothers with higher schooling, who consumed healthy foods such as beans, fruits, vegetables, and milk, as well as among those with family supervision. At the same time, unhealthy habits such as insomnia and alcohol consumption were also positively associated with physical activity. In girls, greater physical activity was observed among those who lived with mothers and whose mothers had higher schooling. In addition to family supervision, the practice of physical activity in girls was also positively associated with the frequency of meals with their parents. However, as in boys, insomnia and alcohol consumption were associated with an increase in the practice of physical activity. CONCLUSIONS: One-fifth of adolescents practice physical activity regularly, demonstrating the need for specific public policies to increase the percentage of active young people in the country. Maternal schooling, healthy eating habits and family supervision were associated with regular physical activity in boys and girls, evidencing the importance of the family for the acquisition of healthy habits in this age group

PERFORMANCE OF SOCCER PLAYERS OF DIFFERENT PLAYING POSITIONS AND NACIONALITIES IN A 30-METER SPRINT TEST

The purpose of this study was to compare the performance of soccer players of different playing positions and different nationalities on a 30-meter sprint test. The players were instructed to run at full speed. Tests were performed on a Soccer field. The mean speed for 10 (V10), 10-30 (V20) and 30m (V30) were determined. The results of 75 Brazilian players of different positions were compared between themselves and 21 first division professional Brazilian players were compared with 18 J-League Japanese players. No difference was found between the performances of Brazilian players of different positions. The performance of Brazilian players in V20 and V30 (8.69 ± 0.64 and 7.68 ± 0.28m•s-1) was better than that of Japanese players (8.11 ± 0.26 and 7.42 ± 0.22m•s-1;

Intensidade de sessões de treinamento e jogos oficiais de futebol

The intensity of individual workout sessions is one of the most determinant components of the training load. However, only a few studies have investigated the intensity of the effort (IE) of training sessions frequently used by soccer and conditioning coaches. The purpose of this study was to compare the IE of two different training sessions, training game (TG) and modified game (MG), with the IE of official soccer matches. The heart rate (HR) of eight U-17 players, from first division Brazilian Soccer club, was measured and registered during two training sessions (TG and MG) and during 6 matches of an official competition. The IE during the matches of the official competition (166 ± 3 bpm and 84 ± 1.3 %HRmax) was higher than TG (150 ± 3 bpm and 75 ± 1.8 %HRmax). However, no difference was found between the IE of official soccer matches and MG (157 ± 5 bpm and 79 ± 2.6 %HRmax). Considering that the IE of the MG was similar to that found in official games, it may be considered as being a specific training stimulus for developing the aerobic capacity of soccer players.No treinamento esportivo, a intensidade é um dos componentes mais determinantes da carga de treinamento. Entretanto, poucos estudos investigaram a intensidade de esforço (IE) de sessões de treinamento freqüentemente utilizadas por treinadores e preparadores físicos de futebol. O objetivo desse estudo foi identificar e comparar a IE de duas sessões de treinamento (coletivo e campo reduzido) com a IE de jogos de uma competição oficial de futebol. A freqüência cardíaca (FC) de oito atletas juvenis, pertencentes a um clube da primeira divisão do futebol brasileiro, foi medida e registrada durante duas sessões de treinamento (coletivo e campo reduzido) e durante seis jogos de uma competição oficial. A IE registrada nos jogos da competição oficial (166 ± 3 bpm e 84 ± 1,3 %FCmáx) foi maior em comparação com a IE registrada durante o treinamento coletivo (150 ± 3 bpm e 75 ± 1,8 %FCmáx). Não houve diferença entre a IE dos jogos da competição oficial e a IE do treinamento em campo reduzido (157 ± 5 bpm e 79 ± 2,6 %FCmáx). A semelhança entre as IEs do treinamento em campo reduzido e dos jogos oficiais registradas no presente estudo sugere que esta atividade pode ser utilizada como um estímulo específico de treinamento aeróbico para o futebol

"Análise da intensidade de treinamentos específicos defutebol"

Exportado OPUSMade available in DSpace on 2019-08-13T16:46:00Z (GMT). No. of bitstreams: 1 disserta__o_final_luciano_antonacci.pdf: 1343237 bytes, checksum: 276484cc3d8010f93b949217784c4bc9 (MD5) Previous issue date: 6O objetivo principal do presente estudo foi analisar a intensidade de treinamentosespecíficos de futebol. Um objetivo secundário foi realizar comparações entre aintensidade de alguns treinamentos. Foram avaliados 22 atletas profissionais, do sexomasculino (24,0 ± 3,0 anos, 74,1 ± 7,5 kg, 9,7 ± 2,4 % de gordura; 63,9 ± 5,3mLO2.kg-1.min-1) pertencentes a um clube de futebol da primeira divisão docampeonato brasileiro. No total, foram analisados oito treinamentos técnicos, doistreinamentos táticos (tático 1 e 2), três treinamentos coletivos que foram divididosem coletivo 1 e coletivo 2, um amistoso, dois campos reduzidos os quais foramdivididos em 1 e 2, um circuito com presença da bola e um ataque contra defesa.Antes da medida da intensidade dos treinamentos específicos foi realizado um testepara se determinar o consumo máximo de oxigênio (VO2max), a freqüência cardíacamáxima (FCmax) e a freqüência cardíaca (FC) correspondente às concentrações delactato (lactatemias) de 2 e 4mM. Este teste também foi utilizado na elaboração deuma equação de regressão linear entre a FC e consumo de oxigênio para cadajogador. A estimativa da intensidade destes treinamentos específicos foi realizadaatravés do registro da FC dos jogadores durante a prática dos mesmos.Posteriormente estes valores de FC foram utilizados para expressar a intensidadeem percentual da FCmax (%FCmax), percentual do VO2max (%VO2max), quilocalorias porminuto (kcal.min-1), múltiplos da taxa metabólica basal (MET) e em três zonas deintensidade (zona fácil, moderada e difícil). As zonas fácil, moderada e difícilconsistiram, respectivamente, no tempo em que a FC permaneceu abaixo daquelacorrespondente às lactatemias de 2mM, entre 2 e 4mM e acima de 4mM de lactatosangüíneo. A intensidade dos treinamentos foram: treinamento técnico (7,2 ± 1,7MET; 62,5 ± 5,3%FCmax); tático 1 (9,1 ± 1,5 MET; 69,1 ± 4,4 %FCmax) e tático 2 (9,2± 1,8 MET; 69,6 ± 6,1%FCmax); coletivo 1 (12,1 ± 1,6 MET; 81,3 ± 4,1%FCmax),coletivo 2 (11,1 ± 1,6 MET; 77,8 ± 4,9 %FCmax); amistoso (13,6 ± 1,5 MET; 85,8 ±4,4%FCmax); campo reduzido 1 (14,6 ± 2,1 MET; 88,6 ± 3,3%FCmax), campo reduzido2 (5,8 ± 2,2 MET; 58,4 ± 5,5%FCmax); circuito com presença da bola (14,0 ± 1,4MET; 87,3 ± 2,4 %FCmax) e ataque contra defesa (10,8 ± 1,5 MET; 75,2 ± 3,4%FCmax). Conclui-se então que a intensidade dos treinamentos analisados nopresente estudo variaram de 5,8 ± 2,2 MET; 58,4 ± 5,5%FCmax até 14,6 ± 2,1 MET;88,6 ± 3,3%FCmax.The main purpose of the present study was to analyze the intensity of soccer specifictraining. The secondary purpose was to compare the intensity between some typesof training. Twenty two male professional soccer players (24,0 ± 3,0 years, 74,1 ± 7,5kg, 9,7 ± 2,4 % of fat; 63,9 ± 5,3 mLO2.kg-1.min-1) pertaining to a Brazilian soccerprofessional league were valuated. In the total, eight technical training, two tacticaltraining (tactical 1 and 2), three practice games, which were divided into practicegame 1 and 2, one friendly game, two reduced fields, which were divided into 1 and2, one circuit with ball and one attack versus defense, were analyzed. Beforemeasuring the intensity of these training sessions, the soccer players performed atest to determine the maximal oxygen uptake (VO2max), maximal heart rate (HRmax)and the heart rate (HR) corresponding to the blood lactate concentrations (BLC) of 2and 4mM. This test was also used to elaborate a linear regression equation betweenHR and oxygen uptake for each player. The intensity of these specific training wereestimated by measurement of the soccer players HR during the activities. Later on,the HR values were used to express the intensity in percentage of HRmax (%HRmax),percentage of VO2max (%VO2max), kilocalories per minute (kcal.min-1), number ofbasal metabolic rate (MET) and three intensity zones (easy, moderate and hardzones). The easy, moderate and hard zones corresponded, respectively, to the timethat the HR remained below those corresponding to the BLC of 2mM, between 2 and4mM and above of 4mM. The intensities of soccer specific training were: technicaltraining (7,2 ± 1,7 MET; 62,5 ± 5,3%HRmax); tactical 1 (9,1 ± 1,5 MET; 69,1 ± 4,4%HRmax) and tactical 2 (9,2 ± 1,8 MET; 69,6 ± 6,1%HRmax); practice game 1 (12,1 ±1,6 MET; 81,3 ± 4,1%HRmax), practice game 2 (11,1 ± 1,6 MET; 77,8 ± 4,9 %HRmax);friendly game (13,6 ± 1,5 MET; 85,8 ± 4,4%HRmax); reduced fields 1 (14,6 ± 2,1 MET;88,6 ± 3,3%HRmax), reduced fields 2 (5,8 ± 2,2 MET; 58,4 ± 5,5%HRmax); circuit withpresence of the ball (14,0 ± 1,4 MET; 87,3 ± 2,4 %HRmax) and attack versus defense(10,8 ± 1,5 MET; 75,2 ± 3,4 %HRmax). We concluded that the intensity of the soccerspecific training ranges from 5,8 ± 2,2 MET; 58,4 ± 5,5%HRmax to 14,6 ± 2,1 MET;88,6 ± 3,3%HRmax

Sociocultural factors related to the physical activity in boys and girls: PeNSE 2012

ABSTRACT OBJECTIVE: To verify in male and female Brazilian adolescents the association of demographic, psychosocial, behavioral and sociocultural characteristics with the regular practice of physical activity. METHODS: The sample consisted of 109,104 adolescents from all Brazilian states attending the 9th year of elementary education in 2012. The response variable was the regular practice of physical activity (300+ minutes/week). The explanatory variables were grouped into four fields: demographic, psychosocial, behavioral and sociocultural. The Poisson regression was stratified by sex to evaluate the association. RESULTS: The prevalence of active adolescents was 20.2%, higher in boys (27.9%) than in girls (13.1%). It was observed a greater practice of physical activity in boys of lower age group, children of mothers with higher schooling, who consumed healthy foods such as beans, fruits, vegetables, and milk, as well as among those with family supervision. At the same time, unhealthy habits such as insomnia and alcohol consumption were also positively associated with physical activity. In girls, greater physical activity was observed among those who lived with mothers and whose mothers had higher schooling. In addition to family supervision, the practice of physical activity in girls was also positively associated with the frequency of meals with their parents. However, as in boys, insomnia and alcohol consumption were associated with an increase in the practice of physical activity. CONCLUSIONS: One-fifth of adolescents practice physical activity regularly, demonstrating the need for specific public policies to increase the percentage of active young people in the country. Maternal schooling, healthy eating habits and family supervision were associated with regular physical activity in boys and girls, evidencing the importance of the family for the acquisition of healthy habits in this age group

Prevalence of physically active adolescents in Brazilian capitals: national adolescent school-based health survey 2012 and 2015 prevalência de adolescentes fisicamente ativos nas capitais brasileiras: pesquisa nacional de saúde do escolar 2012 e 2015

Objective: To compare the prevalence of physically active adolescents living in Brazilian capitals, using 2012 and 2015 National Adolescent School-based Health Survey. Method: The sample consisted of 61,145 (2012) and 51,192 (2015) adolescents who were residents in 27 Brazilian capitals and were attending the 9th year of elementary school. The globally estimated physical activity indicator with the cutoff point of 300 minutes or more per week was used to determine the prevalence of physically active adolescents in both surveys. The prevalence rates were stratified by socio-demographic characteristics (gender, age, maternal schooling and skin color) and by capital of residency. Descriptive statistics were used for comparisons considering 95% confidence intervals. Results: The respective prevalence rates of physically active adolescents observed in 2012 (21.0%; 95%CI 20.3 - 21.7) and 2015 (20.7%; 95%CI 20.1 - 21.3) were similar, independently of the sociodemographic characteristics. In considering the 27 capitals, a reduction in the prevalence of physically active adolescents from 2012 to 2015 was observed only in Belém. Conclusion: Overall, no changes in the prevalence of physically active adolescents residing in urban centers was observed from 2012 to 2015. These findings evidence the need for new public policies in order to enhance and promote the practice of physical activity among Brazilian adolescents, as well as the expansion of existing ones

Análise e comparação da intensidade em sessões específicas de treinamento de futebol.

Este estudo com¬parou a intensidade de quatro treinamentos específicos de futebol (jogo treino, amistoso, treinos técnicos e táticos). Dez jogadores de futebol profissional foram recrutados (24,2 ± 3,7 anos, 177,9 ± 7,3 cm, 63,2 ± 4,6 mLO2•kg-1•min-l). Um teste progressivo intervalado em esteira foi realizado para determinar o VO2max, frequência cardíaca máxima (FCmax), curva FC-VO2, e frequência cardíaca correspondente às concentrações de lactato de 2 e 4 mmol/L. A frequência car¬díaca dos treinos foi usada para estimar a intensidade do exercício e classificá-los em zonas de intensidade (baixa, 4 mmol/L). As intensidades das sessões de treinamento foram diferentes (jogo amistoso: 86,0 ± 5,1% FCmax; jogo treino: 81,2 ± 4,1 % FCmax; treino tático: 70,4 ± 5,3% FCmax; treino técnico: 62,1 ± 3,6% FCmax). O jogo amistoso apresentou porcentagem mais alta de tempo realizado na zona de intensidade alta.This study compared the exercise intensity of four specific soccer training sessions (friendly and training match, tactical and technical workouts). Ten professional soccer players (24.2 ± 3.7 years, 177.9 ± 7.3 cm, 63.2 ± 4.6 mLO2•kg-1•min-l) were recruited. A treadmill progressive interval test was performed to determine the players’ VO2max, maximal heart rate (HRmax), HR-VO2 curve, and the heart rate corresponding to blood lactate concentrations of 2 and 4 mmol/L. The heart rate during the training sessions was used to estimate the exercise intensity and to classify them into intensity zones (low-intensity: 4 mmol/L). Exercise intensities were different among training sessions (friendly match: 86.0 ± 5.1% HRmax; training match: 81.2 ± 4.1% HRmax; tactical workout: 70.4 ± 5.3% HRmax; technical workout: 62.1 ± 3.6% HRmax). The friendly match presented the highest percentage of time performed in the high-intensity zone

<b>Intensity of real competitive soccer matches and differences among player positions.</b> DOI: 10.5007/1980-0037.2011v13n5p341

Most investigations on soccer match intensity have evaluated friendly, simulated or a small number of games on a recreational basis or including a small number of players. There are no studies investigating real competitive situations including a considerable number of athletes and games or differences among player positions using heart rate as an intensity parameter. The aim of this study was to determine Brazilian soccer game intensity (GI) during official competitive matches and to compare GI among different player positions. Heart rate (HR) was measured in 26 under-17 (U-17) and 18 under-20 (U-20) soccer players (age 16.38 ± 0.5 and 18.24 ± 0.66 years, respectively) during 14 and 15 official games, respectively. Individual maximal heart rate (HRmax) and anaerobic threshold (AT) HR were evaluated in field tests. GI defined as %HRmax was monitored considering five intensity zones ranging from 1 = < 70% HRmax to 5 = 95-100% HRmax. Mean GI and AT intensity were 84.4 ± 5.1 and 86.3 ± 4.0% HRmax for the U-17 category and 84.1 ± 4.1 and 87.0 ± 5.1% HRmax for the U-20 category, respectively. Wingbacks (WB) spent more time in zone 5 than forwards (FW) (p<0.05). Midfielders (MF) spent more time in zone 3 than all other players and in zone 4 than defenders and FW (p<0.05). Mean GI and AT intensity were similar. WB performed more maximum effort than FW. MF did not participate as much in maximum effort as did WB and FW

Intensidade de jogos de futebol de uma competição real e entre jogadores de diferentes posições táticas.

A maioria das investigações sobre a intensidade de jogos de futebol foi realizadas em jogos amistosos, simulados ou com um pequeno número de jogos avaliados em caráter recreacional ou com uma pequena amostra. Não se observou nenhuma avaliação de frequência cardíaca (FC) em jogos oficiais com um número considerável de jogadores e de diferentes posições. O objetivo do presente estudo foi determinar a intensidade de jogos (IJ) do futebol brasileiro durante uma competição oficial e compará-la entre jogadores de diferentes posições táticas. A FC foi medida em 26 jogadores entre 16 e 17 anos (Sub-17) e 18 jogadores entre 18 e 20 anos (sub-20) (idades 16,38 ± 0,5 e 18,24 ± 0,66 anos, respectivamente). A frequência máxima individual (FCmax) e a FC de limiar anaeróbico (LAN) foram avaliadas em testes de campo. A IJ como %FCmax foi monitorada como cinco zonas de intensidade sendo desde a zona 1 = <70%FCmax; a 5 = 95-100%FCmax. A IJ media e a intensidade de LAN foram 84,4 ± 5,1; 86,3 ± 4,0%HRmax and 84,1 ± 4,1; 87,0 ± 5,1%HRmax para o sub-17 e sub-20, respectivamente. Os laterais permaneceram mais tempo na zona 5 em comparação aos jogadores atacantes (p<0,05). Os jogadores de meio campo permaneceram mais tempo na zona 3 em comparação aos outros jogadores e na zona 4 em comparação aos zagueiros e atacantes (p<0,05). A IJ média e a intensidade de LAN são similares. Os laterais apresentam mais esforços máximos do que os atacantes e os jogadores de meio campo não participam de tantos esforços máximos como os zagueiros, laterais e atacantes.Most investigations on soccer match intensity have evaluated friendly, simulated or a small number of games on a recreational basis or including a small number of players. There are no studies investigating real competitive situations including a considerable number of athletes and games or differences among player positions using heart rate as an intensity parameter. The aim of this study was to determine Brazilian soccer game intensity (GI) during official competitive matches and to compare GI among different player positions. Heart rate (HR) was measured in 26 under-17 (U-17) and 18 under-20 (U-20) soccer players (age 16.38 ± 0.5 and 18.24 ± 0.66 years, respectively) during 14 and 15 official games, respectively. Individual maximal heart rate (HRmax) and anaerobic threshold (AT) HR were evaluated in field tests. GI defined as %HRmax was monitored considering five intensity zones ranging from 1 = < 70% HRmax to 5 = 95-100% HRmax. Mean GI and AT intensity were 84.4 ± 5.1 and 86.3 ± 4.0% HRmax for the U-17 category and 84.1 ± 4.1 and 87.0 ± 5.1% HRmax for the U-20 category, respectively. Wingbacks (WB) spent more time in zone 5 than forwards (FW) (p<0.05). Midfielders (MF) spent more time in zone 3 than all other players and in zone 4 than defenders and FW (p<0.05). Mean GI and AT intensity were similar. WB performed more maximum effort than FW. MF did not participate as much in maximum effort as did WB and FW