Browsing by Author "Coelho, Leonardo Gomes Martins"

Now showing 1 - 13 of 13
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    Análise das capacidades físicas em crianças dos sete aos dez anos de idade.
    (2014) Borba, Diego de Alcantara; Ferreira Júnior, João Batista; Martini, Angelo Ruediger Pisani; Coelho, Leonardo Gomes Martins; Coelho, Daniel Barbosa; Vieira, Carlos Alexandre
    Capacidade física é o termo utilizado para agrupar as capacidades força, velocidade, resistência, flexibilidade e coordenação. O desempenho físico de crianças é preocupação permanente entre os especialistas da área da saúde. Esse interesse justifica-se já que a atividade física desempenha importante papel na prevenção de doenças e melhoria da capacidade funcional. O objetivo do presente estudo foi analisar as capacidades físicas em crianças de ambos os sexos. Após consentimento por escrito dos pais, participaram do estudo 232 crianças de ambos os sexos entre as idades de sete e 10 anos. A capacidade física foi avaliada utilizando-se os testes de sentar e alcançar, resistência abdominal, salto horizontal e corrida de 30 metros. Foi utilizado ANOVA two way e post hoc de Tukey para comparação das variáveis entre as idades e o sexo. O nível de significância foi de 5%. A flexibilidade não foi modificada pela idade e sexo. O salto horizontal e o número de abdominais foram maiores nos meninos comparados às meninas e nas idades de 10, nove e oito anos comparados a idade de sete anos. O tempo para percorrer 30 m foi menor nos meninos comparado às meninas, sendo que a idade de 10 anos apresentou valores menores comparado as demais idades e as idades de nove e oito anos demonstraram menores valores comparado a idade de sete anos. De modo geral, os meninos apresentam melhor desempenho físico comparado às meninas na faixa etária avaliada. A idade de sete anos parece representar um período de transição no desempenho físico.
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    Analysis of chronic physiological demand of an annual soccer season.
    (2015) Coelho, Daniel Barbosa; Pimenta, Eduardo Mendonça; Paixão, Rodney Coelho da; Morandi, Rodrigo Figueiredo; Oliveira, Lenice Kappes Becker; Ferreira Júnior, João Batista; Coelho, Leonardo Gomes Martins; Garcia, Emerson Silami
    Exercise intensity monitoring has been essential for the control and planning of sports training. Thus, the aim of the present study was to assess the chronic physiological demand of soccer players during an annual soccer season using blood biomarkers. Ten professional soccer players (21.2 ± 3.7 years) participated in this study. Blood samples were collected on the day before beginning of preseason (C1); at the end of preseason and beginning of competitive calendar (C2); and at the end of the competitive calendar. Interleukin-6 (IL-6), cortisol, testosterone, testosterone/cortisol ratio, creatine kinase and alpha-actin were evaluated. Statistical analysis was performed by using ANOVA with repeated measures and the post-hoc Tukey’s test. Significance level was set at P<0.05. The results showed significant differences in the following situations: testosterone – C1 higher than C2 and C3; cortisol – C3 higher than C2; testosterone/cortisol ratio – C2 higher than C1, and C3 lower than C1 and C2; creatine kinase – C2 and C3 higher than C1; alpha-actin – C3 higher than C1. IL-6 concentrations were not different between C1, C2 and C3. It could be concluded that an annual soccer season imposes high physiological demand for professional players, since relevant changes in blood biomarkers analyzed were observed.
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    Assessment of acute physiological demand for soccer.
    (2013) Coelho, Daniel Barbosa; Pimenta, Eduardo Mendonça; Veneroso, Christiano Eduardo; Pacheco, Diogo Antônio Soares; Pereira, Emerson Rodrigues; Coelho, Leonardo Gomes Martins; Garcia, Emerson Silami
    Soccer is a sport practiced worldwide, on all continents. It is considered an intermittent activity of high intensity and long duration, in which movements that require great strength and speed, such as jumps and sprints, result in high levels of muscle microtrauma, hampering athletes’ training and recovery. The present study aimed to evaluate the magnitude of changes in different markers of physiological demand resulting from a soccer match in healthy individuals. Ten healthy male physical education students participated in the study and were evaluated in two matches: the semi-final and final games of the college tournament at the federal university where they studied. Blood samples were collected from each volunteer pre- and post-match. Cortisol, IL-6 and CK concentrations were increased after the match (p < 0.05). Testosterone and alpha-actin concentrations did not change. Our results indicate that changes in some of the acute response markers evaluated in players before and after competitive soccer matches provide important information for planning training or recovery, as well as nutritional strategies for improving performance.
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    Comparison of different ways of expressing creatine kinase concentration of soccer players during a competitive season.
    (2016) Coelho, Daniel Barbosa; Cabido, Christian Emmanuel Torres; Ciminelli, Victor Augusto Lemos; Coelho, Leonardo Gomes Martins; Oliveira, Lenice Kappes Becker; Pereira, Emerson Rodrigues; Marins, João Carlos Bouzas; Garcia, Emerson Silami
    The aim of this study was to analyze the responses of creatine kinase [CK] expressed in different forms to the training load of professional soccer players during a competitive season. Twelve players (age, 24 ± 4 years) participated in the study. [CK] was analyzed before the pre-season (Pre), after the pre-season (Post), and in the competitive mesocycles (M1, M2, and M3). Results showed [CK] in the Pre, Post, M1, M2, and M3 phases in absolute values (181.3 ± 58.7, 416.4 ± 155.7, 526.4 ± 268.0, 403.8 ± 137.0, and 442.5 ± 212.3 U/L, respectively), relative values (16.3 ± 4.6, 39.5 ± 19.1, 47.8 ± 20.1, 37.5 ± 14.2, 40.1 ± 17.4 %CKmáx, respectively), and values relative to the variation delta (19.9 ± 3.6, 48.1 ± 26.5, 57.0 ± 23.2, 45.1 ± 17.7, and 48.3 ± 22.0 %ΔCKmáx, respectively). [CK] was lower only during the Pre phase compared to the other phases (p < 0.05). [CK] was expressed as %CKmáx or %ΔCKmáx may be more specific to monitor training. In addition, the individualization of this biomarker optimizes the athletes’ performance as muscle injuries can be prevented.
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    Correlação entre o desempenho de jogadores de futebol no teste de sprint de 30m e no teste de salto vertical.
    (2011) Coelho, Daniel Barbosa; Coelho, Leonardo Gomes Martins; Braga, Mário Lucio; Paolucci, Alexandre; Cabido, Christian Emmanuel Torres; Ferreira Júnior, João Batista; Mendes, Thiago Teixeira; Prado, Luciano Sales; Garcia, Emerson Silami
    O objetivo do estudo foi determinar o nível de correlação entre o desempenho nos 10m iniciais, dos 20m finais e no tempo total do teste de sprint de 30m, com o do salto vertical com contra-movimento (CMJ) entre jogadores de futebol. Participaram do estudo 167 jogadores das categorias profissional (N. 94) e júnior (N. 73). Foram determinadas as velocidades dos jogadores em 10m (V10), 20m (V20) e no total de 30m (V30). A habilidade de salto foi avaliada através do CMJ. Para correlacionar os dados, foi utilizado o coeficiente de correlação de Pearson com nível de significância de p<0,05. A categoria júnior apresentou maiores valores de V10 e menores valores de V20 em comparação com a categoria profissional (p<0,05). Os valores de correlação entre o CMJ e os parâmetros de velocidade para a categoria júnior foram; r= 0,239, 0,370, 0,408 para V10, V20 e V30 respectivamente e para a categoria profissional foram; r= 0,381, 0,381 e 0,470 para V10, V20 e V30 respectivamente. Quando as duas categorias foram avaliadas em conjunto os valores de correlação foram; r= 0,293, 0,386 e 0,441 para V10, V20 e V30 respectivamente. Foi encontrada uma fraca correlação entre o CMJ e o V10 da categoria júnior sendo a mesma moderada para os demais parâmetros. A categoria profissional apresentou valores de correlação moderada entre o CMJ e todos os outros parâmetros. Maiores valores de correlação do V10 para a categoria profissional pode ser devido a efeitos específicos do treinamento.
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    Efeitos cognitivos do teste de esforço progressivo em eletricistas com equipamentos de proteção individual.
    (2018) Coelho, Leonardo Gomes Martins; Ferreira Júnior, João Batista; Borba, Diego de Alcantara; Fortunato, Ayla Karine; Coelho, Daniel Barbosa
    Objetivo: verificar o efeito do esforço físico sobre as funções cognitivas de trabalhadores eletricistas utilizando equipamento de proteção individual (EPI). Métodos: participaram 28 eletricistas que trabalhavam na construção, manutenção e operação de redes de distribuição de energia. Todos do sexo masculino, sadios e aptos para a prática de exercícios físicos. As funções cognitivas foram representadas pelo teste de reação simples (TRS) e pelo nível de vigilância mental (NVM). O TRS e o NVM foram mensurados pré e pós- -teste máximo progressivo, em esteira rolante, a 27 °C de temperatura seca e umidade relativa do ar de 64%. O teste consistiu em aumentos progressivos na velocidade e na inclinação da esteira até a fadiga, com utilização de EPI. Resultados: a média (desvio padrão) do TRS não foi significativamente diferente antes, 227,8 (35,1) ms, e após o exercício, 220,6 (24,6) ms. O NVM foi significativamente maior após o exercício em todas as situações: frequência crescente – 36,5 (5,1) Hz vs 39,5 (2,7) Hz, frequência decrescente – 36,0 (5,2) vs 39,0 (3,88) Hz, e frequência geral – 36,2 (4,9) vs 39,2 (3,1) Hz. Conclusão: o exercício progressivo máximo realizado com EPI não modificou o tempo de reação simples e aumentou o nível de vigilância mental de eletricistas.
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    Effect of player substitutions on the intensity of second-half soccer match play.
    (2012) Coelho, Daniel Barbosa; Coelho, Leonardo Gomes Martins; Morandi, Rodrigo Figueiredo; Ferreira Júnior, João Batista; Marins, João Carlos Bouzas; Prado, Luciano Sales; Soares, Danusa Dias; Garcia, Emerson Silami
    A maioria das partidas de futebol é conduzida por treinadores que realizam todas as substituições de jogadores permitidas. Dessa maneira, torna-se de extrema importância o estudo destas substituições e sua influência na intensidade de esforço dos atletas. Há de se mencionar, ainda, que não há nenhum estudo na literatura que tenha investigado sobre esse tópico utilizando a frequência cardíaca (FC) como um parâmetro de intensidade. O objetivo deste estudo foi comparar a intensidade de esforço (IE) dos jogadores de futebol nas situações: 1) primeiro tempo (PT-IE); 2) segundo tempo (ST-IE); 3) segundo tempo com substituições (STS-IE). Quarenta e cinco atletas de futebol do sexo masculino (18.5 ± 1.2 anos, 74.25 ± 5.79 kg, 182.6 ± 8.55 cm, 9.56 ± 2.47 %G, 56.3 ± 4.3 mLO2/kg/min) participaram do estudo durante 29 jogos oficiais. IE foi considerada como a média da FC, expressa em percentual da FC máxima (%FCmax) de cada atleta e também de acordo com o tempo percorrido em cada zona de intensidade (Z) específica de acordo com o %FCmax (Z1<70%; Z2 70-85%; Z3 85-90%; Z4 90-95%; Z5 95-100%). IE no PT-IE (86.3 ± 3.3%FCmax) foi maior que no ST-IE (80.6 ± 4.4%FCmax) e que no STS-IE (83.6 ± 2.8 %FCmax). IE no STS-IE foi maior que no ST-IE (p<0,05). O tempo percorrido nas zonas de alta intensidade foi menor no ST-IE quando comparado com o PT-IE e maior no STS-IE quando comparado com o ST-IE (p<0,05). Conclui-se que a diminuição da IE no segundo tempo da partida de futebol foi atenuada com a realização de substituições e foi evidenciado um maior tempo de permanência em zonas de alta intensidade quando comparado com o ST-IE.
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    Effects of human head hair on performance and thermoregulatory responses during 10-km outdoor running in healthy men.
    (2016) Martini, Angelo Ruediger Pisani; Ferreira Júnior, João Batista; Borba, Diego de Alcantara; Coelho, Leonardo Gomes Martins; Coelho, Daniel Barbosa; Prado, Luciano Sales
    The aim of the present study was to evaluate the effects of human head hair on performance and thermoregulatory responses during 10-km outdoor running in healthy men. Twelve healthy males (29.5 ± 3.7 years, 174.9 ± 4.3 cm, 72.7 ± 3.2 kg and VO2max 44.6 ± 3.4 ml.kg-1.min-1) participated in two self-paced outdoor 10-km running trials separated by 7 days: 1) HAIR, subjects ran with their natural head hair; 2) NOHAIR, subjects ran after their hair had been totally shaved. Average running velocity was calculated from each 2-km running time. Rectal temperature, heart rate and physiological strain index were measured before and after the 10-km runs and at the end of each 2 km. The rate of heat storage was measured every 2 km. The environmental stress (WBGT) was measured every 10 min. The running velocity (10.9 ± 1 and 10.9 ± 1.1 km.h-1), heart rate (183 ± 10 and 180 ± 12 bpm), rectal temperature (38.82 ± 0.29 and 38.81 ± 0.49oC), physiological strain index (9 ± 1 and 9 ± 1), or heat storage rate (71.9 ± 64.1 and 80.7 ± 56.7 W.m-1) did not differ between the HAIR and NOHAIR conditions, respectively (p>0.05). There was no difference in WBGT between the HAIR and NOHAIR conditions (24.0 ± 1.4 and 23.2 ± 1.5ºC, respectively; p=0.10). The results suggest that shaved head hair does not alter running velocity or thermoregulatory responses during 10-km running under the sun.
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    Effects of partial-body cryotherapy (− 110 °C) on muscle recovery between high-intensity exercise bouts.
    (2014) Ferreira Júnior, João Batista; Marques, Martim Francisco Bottaro; Soares, Saulo Rodrigo Sampaio; Vieira, Carlos Alexandre; Cleto, V. A.; Cadore, Eduardo Lusa; Coelho, Leonardo Gomes Martins; Simões, Herbert Gustavo; Brown, L. E.
    The aim of this study was to evaluate the effects of a single partial-body cryotherapy bout between training sessions on strength recovery. 12 young men (23.9 ± 5.9 years) were randomly exposed to 2 different conditions separated by 7 days: 1) Partial-body cryotherapy (subjects were exposed to 3 min of partial-body cryotherapy at − 110 °C between 2 high-intensity training sessions); 2) Control (subjects were not exposed to partial-body cryotherapy between 2 high-intensity training sessions). Subjects were exposed to partial-body cryotherapy after the first training session. The 2 knee extension highintensity training sessions were separated by a 40-min rest interval. Knee extension training consisted of 6 sets of 10 repetitions at 60 °.s − 1 for concentric actions and 6 sets of 10 at 180.s − 1 for eccentric actions. The decrease in eccentric peak torque and total work was significantly (p < 0.05) less after partial-body cryotherapy (5.6 and 2 %, respectively) when compared to control (16 and 11.6 %, respectively). However, the decrease in concentric peak torque and total work was not different (p > 0.05) between partial-body cryotherapy (9.4 and 6.5 %, respectively) and control (7.5 and 5.2 %, respectively). These results indicate that the use of partial-body cryotherapy between-training sessions can enhance eccentric muscle performance recovery.
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    Energy demand and heart rate evaluation at different phases during a match along an official soccer competition.
    (2012) Coelho, Daniel Barbosa; Coelho, Leonardo Gomes Martins; Mortimer, Lucas de Ávila Fleury; Hudson, Alexandre Sérvulo Ribeiro; Marins, João Carlos Bouzas; Soares, Danusa Dias; Garcia, Emerson Silami
    The purpose of the present study was to analyze the energy expenditure and heart rate (HR), expressed as mean and maximal heart rate (HRmax), along matches of an official soccer competition. Methods: Eighteen under-20 year old (U-20) soccer players from a first-division Brazilian soccer team were evaluated during 15 matches. The rela¬tionship between HR and oxygen uptake (HR/VO2 relationship) was established, and a linear regression equation was developed for each individual player participating in the study. This equation was then used to determine the oxygen uptake and the correspond¬ing energy expenditure based on the HR values measured during the games. The HR was recorded at 5-second intervals, which were clustered in phases of 15 minutes (0-15 min, 15-30 min e 30-45 min) for each half time (first half [FH] and second half [SH]). Results: The players’ oxygen uptake was 308.3 ± 11.9 LO2/game and the energy expenditure was 17.3±1.3 Kcal.min-1 and 1,542.9±125.1 Kcal/game. The results showed that there were significant differences between the HR and HRmax identified in the first half (FH 15-30 min) compared to the second half (SH 0-15 min and SH 30-45 min), and at FH 30-45 min compared to SH 0-15 min (p<0.05). Conclusions: We concluded that soccer should be considered as an extremely arduous activity for U-20 players due to the high energy expenditure during the matches of an official championship. We also concluded that, during soccer games with young players, FH 15-30 min could be considered the most intense phase, because the highest values of HR and HRmax usually occur at this phase. Key words: Correlation; Energy expenditure; Intermittent.
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    Evaluation of hydration status following soccer matches of different categories.
    (2012) Coelho, Daniel Barbosa; Pereira, Emerson Rodrigues; Gomes, Elisa Couto; Coelho, Leonardo Gomes Martins; Soares, Danusa Dias; Garcia, Emerson Silami
    O objetivo do presente estudo foi avaliar o padrão de hidratação e respostas termorregulatórias de jogadores de futebol de diferentes categorias ao longo de um jogo oficial. Participaram desse estudo jogadores de futebol das categorias sub-15 (N 36) e sub-17 anos (N 14). Os jogadores foram divididos em grupos de acordo com o tempo de atuação em nos jogos: grupo principal, o grupo parcial, grupo intermediário grupo controle. As respostas termorregulatórias decorrentes dos jogos e o estatus de hidratação foram determinados e comparados entre os grupos apresentados. Os grupos principal e parcial apresentaram maiores valores de consumo de água, perda de peso e taxa de sudorese em comparação aos grupos intermediário e controle (p<0,05). A diferença de peso pré e pós-jogo entre as categorias foi maior nos atletas da categoria sub17 em comparação com os atletas sub 15 no mesmo grupo (p<0,05). Conclui-se que um jogo de futebol foi capaz de alterar de forma significativa os parâmetros de hidratação dos jogadores de futebol tendo relação direta com o tempo de atuação em campo.
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    Exercise intensity during official soccer matches.
    (2016) Coelho, Daniel Barbosa; Paixão, Rodney Coelho da; Oliveira, Emerson Cruz de; Oliveira, Lenice Kappes Becker; Ferreira Júnior, João Batista; Coelho, Leonardo Gomes Martins; Dias, João Carlos; Garcia, Emerson Silami
    The aims of the study were: 1) to analyze the exercise intensity in several phases (six phases of 15 min) of soccer matches; 2) to compare the match time spent above anaerobic threshold (AT) between different age groups (U-17 and U-20); and 3) to compare the match time spent above AT between players’ positions (backs, midfielders, forwards and wingabcks). Forty-four male soccer players were analyzed. To express players’ effort, the heart rate (HR) was continuously monitored in 29 official matches. Further, HR corresponding to the intensity at the onset of blood lactate accumulation (OBLA) was obtained in a field test. The highest exercise intensity during match was observed in the 15-30 min period of the first half (p< 0.05). Match time spent above AT was not different between players from U-17 and U-20. In the comparison among players’ positions, wingbacks showed lower time above AT (p< 0.05) than players of other positions. The intensity of effort is higher in the 15 to 30 minutes of play (intermediate phase), probably because the players are more rested in the beginning and wearing out is progressive throughout the game. It is also noteworthy that the intensity of exercise (HR and time above AT) of wingbacks was lower, probably because they usually are required to run a larger number of sprints and need more time below the AT to recover.
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    Head pre-cooling improves 5-km time-trial performance in male amateur runners in the heat.
    (2021) Coelho, Leonardo Gomes Martins; Ferreira Júnior, João Batista; Williams, Thomas B.; Lima, André Maia; Borba, Diego de Alcantara; Silva, Cristiano D.; Coelho, Daniel Barbosa; Barros, Cristiano Lino Monteiro de; Prado, Luciano Sales; Garcia, Emerson Silami
    This study aimed to evaluate the effect of head pre-cooling on the 5-km time-trial perfor- mance of amateur runners in the heat. In a counterbalanced design, 15 male amateur run- ners (22.6 ± 3.5 y; VO2 max in heat 42.3 ± 4.4 mLO2/kg/min) completed two 5-km time trials performed in the heat (35°C, 50% relative humidity). In one trial (HCOOL), partici- pants underwent 20 min of head cooling in a temperate environment (23°C, 70% relative humidity) prior to exercise. In another trial (CON), exercise was preceded by 20 min of rest under the same temperature conditions. Exercise time was shorter in HCOOL (25 min and 36 s ± 3 min) compared to CON (27 ± 3 min; p = 0.02). Rectal tempera- ture was reduced during the pre-exercise intervention in HCOOL (p < 0.001), but not in CON (p = 0.55). Relative changes in rectal temperature and mean head temperature were lower throughout HCOOL when compared with CON condition (p = 0.005 and p = 0.022, respectively). Mean skin temperature, heart rate, and rating of perceived exer- tion did not differ between HCOOL and CON conditions throughout exercise (p = 0.20, p = 0.52 and 0.31, respectively). Thermal comfort was lower in HCOOL condition in pre-exercise (p = 0.014) with no differences observed throughout exercise (p = 0.61). 5-km running performance in a hot environment was improved after a 20-min head cool- ing intervention, suggesting that this method may be practical as pre-cooling strategy and easily administered to both professional and amateur runners alike.