Thiago Viana Camata- Phd
- PostDoc Position at Londrina State University
Thiago Viana Camata
- Phd
- PostDoc Position at Londrina State University
About
40
Publications
17,206
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
231
Citations
Introduction
Current institution
Additional affiliations
Education
January 2012
January 2009 - August 2011
January 2005 - December 2008
Publications
Publications (40)
Youth soccer academies are dominated by the older players in each annual age cohort because they are judged to be better at the time of selection. Failing to identify talented players because they are simply younger in their cohort is a problem of both discrimination and poor practice. One potential method for addressing such biases is to develop a...
Background/Objectives: Dribbling is a fundamental skill in soccer, but assessing the performance of youth players in this skill is complicated by the confounded effects of age and physical development. In this study, our aim was to quantify the interactive effects of age, height, and mass on the dribbling performance of 180 players between 10 and 2...
In many youth sports, selection into elite training academies is dominated by athletes born earlier in the year. Previous research suggests this is partly due to these athletes being more physically developed than their younger peers. How athletes born later in the year survive in elite academies is less understood. Here, we tested the hypothesis t...
We designed and tested a protocol for measuring the performance of individuals in small‐sided soccer games. We tested our protocol on three different groups of youth players from elite Brazilian football academies. Players in each group played a series of 3v3 games, in which individuals were randomly assigned into new teams and against new opponent...
Kicking powerfully and accurately is essential in soccer, and players who kick proficiently with both feet are highly sought after. Assessing performance in youth players is often confounded by more physically developed players outperforming their smaller peers. To alleviate such bias, we present a testing protocol and normative data developed with...
O objetivo deste estudo foi comparar o equilíbrio postural de idosos praticantes de duas modalidades de exercícios físicos, idosos não praticantes e adultos jovens, na presença e ausência de informação visual. Participaram 51 indivíduos (n = 31 do sexo feminino e n = 20 do sexo masculino), subdivididos em quatro grupos: idosos praticantes de karatê...
O objetivo do estudo foi comparar o efeito da dupla-tarefa e da manipulação visual no equilíbrio posturalem idosos praticantes de diferentes modalidades de exercícios físicos, idosos e adultos jovens não praticantes. Participaram do estudo 51 indivíduos, subdivididos em quatro grupos: grupo de idosos praticantes de karatê (GPK), grupo de idosos pra...
The aim of this study was to use technical skill and physical performance and coaches’ rankings to predict the defensive performance of junior soccer players. Twenty-one male players (mean age 17.2 years, SD = 1.1) were recruited from the Londrina Junior Team Football Academy in Brazil. Data were collected during regular training sessions. After pa...
Summary results from the linear regression, testing the effects of dribbling ability, sprinting speed and coach ranking on the average length of a contest for each defender in the one vs. one competition.
(DOCX)
The five 30 m-long paths used to assess dribbling and sprinting performance for the individual players in our study.
The curvature of each path was (A) 0 radians.m-1, (B) 0.37 radians.m-1, (C) 0.67 radians.m-1, (D) 1.03 radians.m-1, and (E) 1.37 radians.m-1. The outline of each path was marked with 6 mm plastic chain and the width of each path was...
Proportion of variance explained by each fixed effect in the binomial logistic regression testing the effects of dribbling ability, sprinting speed and coach ranking on the defensive success of each player in the one vs. one competition.
(DOCX)
Defensive performance data set.
Summary of the data set used to assess defensive performance of individual players in one vs. one soccer games.
(DOCX)
Summary results from the binomial logistic regression, testing the effects of dribbling ability, sprinting speed and coach ranking on the defensive success of each player in the one vs. one competition.
(DOCX)
Summary results from the linear mixed effects model, testing the effects of relative dribbling ability (PCD1), relative sprinting speed (PCS1) and relative coach ranking on the defender’s success in each paired bout in the one vs. one competition.
(DOCX)
Principal components analysis matrix of dribbling and sprinting performance (N = 21) along the five paths that differ in curvature from 0 to 1.37 radians.m-1.
Factor loadings of each measured variable and the direction in which they contribute towards the components are shown. See the text for a description of each trait. The first component of the...
This study examined the effect of temporal occlusion of a volleyball spike on the defensive decision making of athletes with different levels of experience. The participants were divided in three groups:
adult (GAD; n = 16), sub-17 (GIM; n = 16) and novice adult (GNO; n = 16). Images of attacks performed by 4 athletes were edited in fi ve different...
The objective was to present some reflections about what has been discussed by the scientific community in general, and in the field of Physical Education in special, on the theme of questionable practices used in scientific research. Among the numerous strategies to take advantage of the system that evaluates research productivity, the questiona...
O objetivo do estudo foi analisar os efeitos da ingestão de cafeína sobre o desempenho físico e estado de humor de ciclistas em teste contrarrelógio de 1 km. Dez ciclistas do sexo masculino realizaram aleatoriamente um teste contrarrelógio de 1 km em duas condições experimentais: ingestão de cafeína (CAF - 6 mg.kg-1) e placebo (PL) 60 min antes do...
INTRODUÇÃO O futsal faz parte de um conjunto de modalidades esportivas que com-põem os chamados Jogos Desportivos Coletivos (JDC) que, para Garganta (1997), caracterizam-se por serem jogos em que as ações são executadas de forma imprevisível, apresentando características eminentemente táticas. Adi-cionalmente, o futsal exige de seu praticante uma p...
O objetivo do estudo foi analisar os efeitos da ingestao de cafeina sobre o desempenho fisico e estado de humor de ciclistas em teste contra-relogio de 1 km. Dez ciclistas do sexo masculino realizaram aleatoriamente um teste contra-relogio de 1 km em duas condicoes experimentais: ingestao de cafeina (CAF - 6 mg.kg -1 ) e placebo (PL) 60 min antes d...
This study analyzed the effects of caffeine ingestion on physical performance and mood state of cyclists in a 1km time trial test. Ten male cyclists performed randomly a 1km time-trial test under two experimental conditions: Caffeine (CAF - 6 mg.kg-1) and placebo (PL) 60 min before the test. During the test were obtained the total time and the mood...
http://dx.doi.org/10.5007/1980-0037.2012v14n6p660
The aim of this study was to compare the electromyographic indices of fatigue (slope of median frequency) calculated with the fast Fourier transform (FFT) and wavelet transform (WT) in trained and untrained individuals during cycle exercise. A second objective was to compare the variance of the spe...
El análisis espectral de la señal de EMG en el esfuerzo supra-máximo en el cicloergómetro utilizando las transformaciones de Fourier y Wavelet: un estudio comparativo Objetivo. El propósito de este estudio fue comparar los métodos transformados de Fourier (STFT) y Wavelet (WT) para evaluar la fatiga muscular durante el ejercicio supra-máximo. Métod...
This study compared the activation pattern and the fatigue rate among the superficial muscles of the quadriceps femoris (QF) during severe cycling exercise. Peak oxygen consumption (VO(2)peak) and maximal accumulated oxygen Deficit (MAOD) were established by 10 well-trained male cyclists (27.5 ± 4.1 years, 71.0 ± 10.3 kg, 173.4 ± 6.6 cm, mean VO(2)...
RESUMO O objetivo deste estudo foi investigar possíveis diferenças na análise espectral do sinal EMG dos músculos superficiais do quadríceps, entre as técnicas transformadas de Fourier de tempo curto (STFT) e a contínua de Wavelet (CWT) do tipo db4 durante exercício submáximo de carga constante no cicloergômetro. Participaram do estudo 14 indivíduo...
Frequency domain analyses of changes in electromyographic (EMG) signals over time are frequently used to assess muscle fatigue. Fourier based approaches are typically used in these analyses, yet Fourier analysis assumes signal stationarity, which is unlikely during dynamic contractions. Wavelet based methods of signal analysis do not assume station...
Frequency domain analyses of changes in electromyographic (EMG) signals over time are frequently used to assess muscle fatigue. Fourier based approaches are typically used in these analyses, yet Fourier analysis assumes signal stationarity, which is unlikely during dynamic contractions. Wavelet based methods of signal analysis do not assume station...
Frequency domain analyses of changes in electromyographic (EMG) signals over time are frequently used to assess muscle fatigue. Fourier based approaches are typically used in these analyses, yet Fourier analysis assumes signal stationarity, which is unlikely during dynamic contractions. Wavelet based methods of signal analysis do not assume station...
Aim: The aim of the study was to investigate the effects of caffeine intake on anaerobic performance and rate of muscle fatigue in young men and women. Methods: Fourteen recreationally active college students volunteered to the study (7 male, 29.1 ± 2.8 y and 7 female, 22.5 ± 2.9 y) (73.06 ± 13.08 Kg, 173.00 ± 6.90 cm, 24.08 ± 3.01Kg/m 2). The part...
The aim of this study was to investigate the influence of gender on the EMG signal of the muscles of the quadriceps femoris and the physical performance in high-intensity, short-term exercise. Fourteen volunteers (7 men = 29.1 +/- 2.8 years and 7 women = 22.6 +/- 2.9 years) performed a Wingate Test (WT) with a load of 7.5% of body mass. The variabl...
The objective of this study is to verify the coincidence between the occurrence of the electromyographic fatigue threshold (EMGth) and the ventilatory threshold (Vth) in an incremental test in the cyclosimulator, as well as to compare the calculation of the RMS from the EMG signal using different time windows. Thirteen male cyclists (73.7 +/- 12.4...
The objective of this study was to compare the efficiency of pedaling (EP) and the electromyographic activity (EMG) between cyclists and non-cyclists during cycling in different cadences. Using a cyclosimulator, 12 cyclists (26.5 +/- 4.5 years; 68.2 +/- 10.5 kg; 175.6 +/- 8.2 cm) and 9 non-cyclists (25.1 +/- 4.3 years; 72.6 +/- 9.8 kg; 174.6 +/- 6....
