Jonatas Santos

• PhD
• Professor (Associate) at Federal University from Jequitinhonha and Mucuri's Valleys

Plyometric training is frequently used to improve the jumping performance of volleyball players. The aim of the present study was to synthesize the results of different systematic reviews that investigated the effects of plyometric training on the jumping performance of volleyball players. Systematic research was performed in PubMed, Scopus, and We...

Abstract Objective To identify the association of trunk and lower limb factors with shoulder complaints and sport performance in overhead athletes. Methods Search performed at PubMed/Medline, Embase, CINAHL, LILACS, Cochrane, Web of Science and SPORTDiscus for observational studies. Methodological quality and strength of the evidence was assessed...

In combat sports, the specificity of the training requires that the athlete improve all performance indicators associated with the match. For this reason, muscle power seems to be determinant during the application of the techniques that result in scores, specifically punches, kicks, elbows, knees, throwing techniques, transitions to the groundwork...

Aim. The frequency speed of kick test (FSKT) is performed by taekwondo athletes and practitioners in a short version (10s), and an intermittent version (5 sets x 10s effort/10s pause). The purpose of the present study was to determine the views of coaches with different academic backgrounds on the frequency speed of kick test (FSKT). Material, Meth...

The aim of the present study was to establish the effects of three conditions of post-activation potentiation (PAP) exercises on kicking frequency, fatigue rate (FR) and jump performance in novice and advanced taekwondo athletes. Secondarily, to establish if the PAP strength plus plyometrics exercises produced a significantly higher increase with r...

Aim. The purpose of the present study was to describe the reliability, sensibility and construct validity (discriminant) of male taek- wondo athletes in the frequency speed of kick test (FSKT) using single and multiple sets. Material, Methods and Results. The study was divided in two parts. The first part consisted of fourteen male black-belt taekw...

Specific training methods is an important aspect in the preparation of taekwondo athletes. The purpose of this study was to investigate the effect of a short-duration high-intensity interval training (HIIT) program with specific taekwondo techniques on anaerobic performance. Twelve taekwondo athletes were randomized into a control (n=6) or experime...

Specific training methods is an important aspect in the preparation of taekwondo athletes. The purpose of this study was to investigate the effect of a short-duration high-intensity interval training (HIIT) program with specific taekwondo techniques on anaerobic performance. Twelve taekwondo athletes were randomized into a control ( n =6) or experi...

Background and Study Aim: The most successful countries in wrestling have many studies that contribute to development, not only this sport. Results, conclusions and recommendations from these studies being essential to research Chilean wrestlers to establish indicators of evaluation for the needs of selection and training effects. The cognitive aim...

Taekwondo is a complex combat sport characterized by high-intensity short activity and low-intensity activity and/or pause. This systematic review focused on which type of physical capacities and the main physiological adjustments that are demanded during official taekwondo matches. The search was performed in electronic databases in which 38 artic...

THE PURPOSE OF THIS SYSTEMATIC REVIEW IS TO EXAMINE THE RESEARCH METHODOLOGICAL QUALITY, MEASUREMENT PROPERTIES, AND FEASIBILITY OF REPEATED SPRINT ABILITY TESTS. RESULTS SHOWED THAT TEST-RETEST ABSOLUTE AND RELATIVE RELIABILITY WAS VERY LARGE TO NEARLY PERFECT FOR TOTAL WORK AND BEST SPRINT PERFORMANCE. HOWEVER, THE FATIGUE INDEX PRESENTED A WEAK...

EL ENTRENAMIENTO INTERVALADO DE ALTA INTENSIDAD MEJORA EL RENDIMIENTO ESPECÍFICO EN LOS ATLETAS DE TAEKWONDO REFERENCIAS Doce atletas de taekwondo fueron asignados al azar a un grupo control (n = 6) o grupo experimental (n = 6). El protocolo experimental consistió en 3 bloques de 6 series de esfuerzo total de 10 segundos, con recuperación pasiva de...

Recently, the frequency speed of kick test (FSKT10s) and its intermittent version (5 x 10s/10s intervals, FSKTmult) have been used to assess physical fitness of taekwondo athletes, but no classificatory normative table was found for these tests. Thus, the aim of present study was to present two normative classificatory tables for the FSKT10s and FS...

The aim of this study was to evaluate if caffeine can reduce the negative influence of diurnal variations on repeated-sprint performance, in addition to investigating if caffeine in the afternoon would potentiate performance compared with the morning. Thirteen physically active men took part in this randomized, double-blind, placebo-controlled and...

Introdução: O taekwondo é uma modalidade esportiva de combate olímpica e, como tal, há interesse por parte dos treinadores em otimizar o processo de treinamento de seus atletas, o que justifica a condução de testes específicos para avaliação das respostas ao treinamento e discriminação de atletas de diferentes níveis. No entanto, até o presente mom...

Construct validity is a desirable characteristic in any performance test to differentiate athletes. However, no taekwondo-specific test was investigated with this purpose. The purpose of the present study was to compare female taekwondo athletes grouped in different competitive levels. Forty-two female taekwondo athletes divided in International/Na...

Purpose: To investigate the effect of sodium bicarbonate (NaHCO3) on performance and estimated energy system contribution during simulated taekwondo combat. Methods: Nine taekwondo athletes completed two experimental sessions separated by at least 48 h. Athletes consumed 300 mg/kg body mass of NaHCO3 or placebo (CaCO3) 90 min before the combat s...

Aim. Te purpose of this study was to verify the relationship between frequency speed of kick test (FSKT) performance, optimal load, and anthropometric characteristics in taekwondo athletes. Material and Methods. Sixteen black-belt taekwondo athletes volunteered to participate in the study. FSKT performance with durations of 10s and 90s, optimal loa...

Background and Study Aim: Background and Study Aim: Using specific training methods is an important aspect in the preparation of taekwondo athletes. The purpose of the present study is the knowledge about physiological responses, during three different training protocols and official taekwondo matches. Material and Methods: Eleven black-belt taek...

INTRODUCTION: The purpose of this study was to investigate physiological response during three different training protocols and an official competition. METHODS: Eleven taekwondo athletes participated (mean ± SD, age: 24 ± 5 years, body weight: 76.8 ± 15.3 kg, height: 178 ± 0.1 cm and BMI: 24.1 ± 3.7 kg / m2). The training protocols consisted of 2...

Background & Study Aim: Ideal control of training load and physiological recovery between training sessions and competitions are important aspects for training periodization and improve performance in competition. The aim of this study was to investigate the effects of 4-weeks of three different modes of high-intensity interval training (HIIT) on t...

Background No study has elaborated the normative tables to classify judo athletes as to the dynamic and isometric chin-up judogi tests. PurposeTo elaborate normative judogi chin-up tables to classify judo athletes. Methods138 male judo athletes from state, national, and international levels participated in the study. All tests were carried out duri...

Background and Problem. Taekwondo is an Olympic sport characterized by the extensive use of kicking techniques which require a significant amount of explosive force and agility [Valdes-Badilla et al. 2014; Perez-Gutierrez et al. 2015]. It is considered an intermittent- high intensity short duration discipline, in which the predominance of the aerob...

Background and Study Aim: Ideal control of training load and physiological recovery between training sessions and competitions are important aspects for training periodization and improve performance in competition. The aim of this study was the effects of 4-weeks of three different modes of high-intensity interval training (HIIT) on the heart rate...

This study investigated the prevalence, magnitude, and methods of rap-id weight loss among male and female Taekwondo athletes from all competitive levels. A questionnaire was administered to 72 men (regional/state level, n=31; national/international level, n=41) and 44 women (regional/state level, n=9; national/international, n=35). Among the male...

The purpose of this study was to investigate the frequency speed of kick test (FSKT) responsiveness to 9 weeks of taekwondo-specific training. Eight black-belt taekwondo athletes (mean and standard deviation; body mass: 74 ± 15 kg; height: 178 ± 9 cm; age: 24 ± 4 years; practice time: 12 ± 6 years), volunteered to participate. Each athlete performe...

[This corrects the article DOI: 10.1371/journal.pone.0142078.].

This study analysed the physiological, nutritional and performance profiles of athletes practicing Brazilian jiujitsu. To this end, 15 athletes that practiced Brazilian jiu-jitsu (aged: 28 ± 5 years; 8 brown belts and 7 black belts; training experience: 11 ± 4 years) underwent anthropometric measurements (body composition and somatotype), dietary e...

The aim of this study was to assess the effects of different postactivation potentiation conditioning activities’ volumes and intensities on countermovement jump and multiple sets of high speed kicks. Nine taekwondo athletes (M±SD; age: 20.3±5.2 years; height: 177±7.2 cm; body mass: 71.8±15.3 kg; maximum dynamic half-squat 1RM: 132.8±32.5 kg and pr...

Poster

This study aimed at describing the changes in physical and physiological performance of a two-time World Karate Federation Champion athlete immediately prior to and after a bout simulation. The karateka was submitted to: (a) squat and countermovement jumps, jump squat and bench throw and maximal isometric force tests (half-squat and bench press, pr...

Objectives The present study aimed to evaluate the effects of using hyperbaric oxygen therapy during post-training recovery in jiu-jitsu athletes. Methods Eleven experienced Brazilian jiu-jitsu athletes were investigated during and following two training sessions of 1h30min. Using a cross-over design, the athletes were randomly assigned to passive...

Objectives: The aim of this study was to evaluate the effect of caffeine ingestion on performance and estimated energy system contribution during simulated taekwondo combat and on post-exercise parasympathetic reactivation. Methods: Ten taekwondo athletes completed two experimental sessions separated by at least 48 hours. Athletes consumed a cap...

Resumo apresentado no IV Congresso de Ciência do Desporto na Universidade Estadual de Campinas/SP

Aim and Method. The purpose of this study was to describe the physical performance (acceleration, number of impacts, distance and maximum speed) and physiological response (heart rate and blood lactate) of young female taekwondo athletes during combat simulations. Material. The sample consisted of seven girls (13.1 ± 1.1 years), who participated in...

Resumo apresentado no Congresso Internacional do Celafiscs/2015

Periód ico do Instituto Brasileiro de Pesquisa e En s in o e m F is i o l o g i a d o E x e r c í c i o w w w. i b p e f e x. c o m. b r / w w w. r b p f e x. c o m. b r 1 RESUMO O objetivo deste artigo é resumir os resultados apresentados na literatura que relacionam Tai Chi Chuan (TCC) e saúde, visando a dar direção a futuras pesquisas e interven...

da Silva Santos, JF, Valenzuela, TH, and Franchini, E. Can different conditioning activities and rest intervals affect the acute performance of taekwondo turning kick? J Strength Cond Res 29(6): 1640-1647, 2015-This study compared the acute effect of strength, plyometric, and complex exercises (combined strength and plyometric exercise) in the coun...

Taekwondo has evolved into a modern-day Olympic combat sport. The physical and physiological demands of modern-day taekwondo competition require athletes to be competent in several aspects of fitness. This review critically explores the physical and physiological characteristics of taekwondo athletes and presents implications for training and resea...

RESUMO Em esportes de combate que envolvam categorias de peso, torna-se importante o controle das variáveis antropométricas e de composição corporal para a aquisição do sucesso esportivo. O objetivo do presente estudo foi analisar as variáveis: estatura, massa corporal, massa livre de gordura, massa gorda, massa óssea, % Gordura e peso residual em...

The main aim of this paper was to study the kinetics of the straight punch and to check the influence of the movement of the non-punching fist on the speed of the punching fist. The study was conducted on a group of 10 taekwon-do ITF (International Taekwon-do Fedearation) athletes. Having adopted the starting position the athletes executed the punc...