Arnaldo Mortatti

Federal University of Rio Grande do Norte | IIP · Departamento de Educação Física

Purpose : The purpose of this study is to describe the association between the volume and intensity of accelerometer-assessed physical activity (PA) and markers of obesity. Method : Forty-seven children (20 girls) took part in this investigation. Children wore accelerometers on their nondominant wrists for 7 days. PA was expressed as average accele...

Diverse strategies for manipulating acute training load can be employed in small-sided games. However, the impact of different scoring methods on the internal and external training loads of young athletes during such games remains a topic of debate. The present study aimed to compare external and internal training loads and perceive recovery in sma...

The aim of the study was to evaluate the impact of five congested matches on the relative intensity, stress symptoms and muscle pain female futsal athletes. Eight female futsal athletes (20.1±3.1 years; 58.6±5.2 kg; 160.0±5.0cm;) were submitted to five successive matches, with a rest interval of approximately 24 hours. The relative match intensity...

Purpose: The aim of this study was to examine how intensifying training loads over a week affects the sleep patterns of young soccer players on the nights immediately following the intensified training sessions. Methods: Quasi-experimental study. Fifteen young athletes participants of a team engaged in national level competition, underwent two week...

Introduction: During the sports training process, there is different training load orientation that can cause an increased need for sleep to athletes. Therefore, the goal of this study was to verify if the acute load of soccer training, in young athletes, carried out during a week of intensification are enough to modify the sleep pattern of young f...

Objectives: To analyze bone mineral content (BMC) and area bone mineral density (aBMD) accrual in adolescent male footballers who started their first football season. Methods: 17 athletes (14.8 ± 0.4 years) were monitored across 15 weeks of football training. Participants were evaluated for somatic maturation (HPHV), BMC, and aBMD at three time...

INTRODUCTION: Young athletes are exposed to successive periods of changes in training loads, which can affect their sleep-related health and mood states. OBJECTIVE: To analyze the effect of different training load magnitudes on sleep patterns and mood states in young soccer players. METHODS: 13 young soccer players (15.93 ±0.59 years; 68.70 ±6.12 k...

Introduction: Young athletes, during the pre-season and season phases, are exposed to successive periods of changes in the magnitude of training loads, which can directly affect the quantity and quality of sleep. Aim: To analyze the influence of different training load magnitudes on sleep parameters and their relationship with sleep-related variab...

The aim of the study was to analyze muscle activation in the three positions of the deadlift (DL). Twenty male participants (33.4 ± 3.9 years; 42.2 ± 9.1 months of experience with DL; 91.0 ± 14.8 kg; and 1.78 ± 0.06 m) pulled a bar through isometric actions in three DL positions: lift-off, mid-pull, and lockout. Isometric strength, knee angle, and...

The objective of this study was to analyze the effect of mental fatigue from playing videogame immediately prior matches during a simulated congested match schedule (SCMS) on decision-making performance in professional soccer players. Sixteen players participated were volunteers in this study. The participants performed four simulated soccer matche...

Ferreira, ABdM, Ribeiro, BLL, Batista, EdS, Dantas, MP, and Mortatti, AL. The influence of different training load magnitudes on sleep pattern, perceived recovery, and stress tolerance in young soccer players. J Strength Cond Res 37(2): 351–357, 2023—The aim of this study was to analyze the influence of 3 weeks on sleep parameters, perceived recove...

INTRODUCTION: Diverse strategies to manipulate acute training load can be used in small-sided games (SSG). However, how different methods to score during SSG influence internal and external workloads in young athletes is still under debate. OBJECTIVE: To compare external and internal training loads between SSGs played with different rules to score...

Purpose: To compare the effects of 12-week high-intensity interval (HIIT), moderate-intensity continuous (MICT), and self-selected intensity training (SSIT) on health outcomes and affective responses. Methods: Seventy-three overweight/obese inactive adults (62% woman; age, 31.4 ± 7.2 years; height, 1.66 ± 0.09 cm; Body mass index, 28.9 ± 2.7 kg.m−2...

Background This study aimed to compare the stress tolerance, competitive anxiety, heart rate variability and salivary cortisol before and during successive futsal competitive matches (3 matches in 4 days) in young male futsal players. Methods 10 young male futsal players (16.9 ± 0.7 age; 71.0 ± 5.1 kg; 174.9 ± 4.3 cm) were monitored during one tra...

PurposeThis study aimed to analyze the impact of competition with successive basketball matches on mood, stress tolerance, competitive anxiety, total quality of recovery and neuromuscular performance in adolescent basketball athletes.Methods Ten youth basketball players (14.8 ± 0.5 years; 59.4 ± 9.1 kg; 173.7 ± 5.9 cm) were evaluated during a tourn...

International Journal of Exercise Science 15(6): 1040-1051, 2022. The aim of this study was to assess the effect of repeated-sprint training (RST) on vertical jump ability and aerobic power in college volleyball players. Nineteen male volleyball players, aged between 18-24 years, were randomized into the RST group (RST; n = 10) and control group (C...

Purpose: This study aimed to analyze the effects of training load on stress tolerance (ST) and secretory immunoglobulin A (SIgA) in male and female high-intensity functional fitness (HIFF) athletes during two different 10 and consecutive weekly training volume loads [higher (week 1) and lower volume (week 2)]. Methods: 14 athletes [7 males: 29.3 (±...

This study aimed to evaluate the effect of cycling-induced fatigue on subsequent running with different ground inclinations on triathletes. Twenty male triathletes ran on a treadmill at individual speeds, on three inclines: level (0%), 7% uphill (7%), and 7% downhill (-7%). Subsequently, the athletes performed an incremental ramp-to-exhaustion (RTE...

Introduction: Sedentary behaviour (SB) may negatively infl uence cardiorespiratory fi tness (CF) and adiposity in adolescents. Objective: to analyse levels of CF and SB of overweight and obesity adolescents with diff erent somatic maturation. Material and Methods: 34 male adolescents (age: 16,1 ±1,5 years) were divided into three groups of somatic...

Background Identifying low skeletal muscle strength (SMS), skeletal muscle mass (SMM) and skeletal muscle quality (SMQ) is pivotal for diagnosing sarcopenia cases. Age-related declines in SMS, SMM, and SMQ are dissimilar between the upper (UL) and lower limbs (LL). Despite this, both UL and LL measures have been used to assess SMS, SMM and SMQ in o...

The study aim was to analyze the effects of successive matches on the internal match load, stress tolerance, salivary cortisol concentration and countermovement vertical jump height in twelve youth soccer players (16.6 ± 0.5 yr; 175 ± 8 cm; 65 ± 8 kg) who performed four official matches within a four day-period with a 24-h recovery interval between...

This study aims to determine whether motor coordination influences the perception-decision time (perceptual-cognitive factor) and movement response time (physical factor) of young soccer players in a sport-specific agility task regardless of maturation. Eighty-seven young male soccer players were analysed. Anthropometric measurements were used to d...

FREE FULL TEXT AT: https://doi.org/10.1590/1980-0037.2021v23e73799 >>> The study aimed to verify the correlation between resting heart rate variability (HRVrest) and endurance performance in female futsal players, as well as to evaluate the reliability of this parasympathetic autonomic marker. A total of 16 female futsal players (age: 22 ± 3 years;...

Purpose: This study compared the effect of low-volume high-intensity training (LV-HIIT) sessions with different work-recovery durations on muscle damage markers.Methods: Twenty-four trained adult males (22.3 ± 2.9 years; 24.6 ± 2.7 kg∙m-2) performed two LV-HIIT sessions (10 x 60 s and 20 x 30 s at 100% of maximal aerobic speed on treadmill (Vmax) i...

High-intensity functional training (HIFT) is characterized by presenting high volumes and training intensities with constantly varied exercises. The aim of this study was to analyze the internal training load and the effects of high-intensity functional training on physical performance in subjects with different training volumes and frequencies. A...

High-intensity functional training (HIFT) is characterized by presenting high volumes and training intensities with constantly varied exercises. The aim of this study was to analyze the internal training load and the effects of high-intensity functional training on physical performance in subjects with different training volumes and frequencies. A...

Menezes, GB, Alexandre, DR, Pinto, JC, Assis, TV, Faigenbaum, AD, and Mortatti, AL. Effects of integrative neuromuscular training on motor performance in prepubertal soccer players. J Strength Cond Res XX(X): 000-000, 2020-The present study examined the effects of integrative neuromuscular training (INT) on motor performance in prepubertal soccer p...

The aim of this study was to analyze the effects of a congested match schedule (CMS) undertaken after a tapering week, on internal match load (IML) and salivary immunoglobulin A (SIgA) concentration in 12 youth soccer players (16.6 ± 0.5 years; 175 ± 8 cm; 65 ± 8 kg) who performed 4 official matches within a 4-day period. Internal match load was de...

Purpose: The aim of this study was to compare strength-endurance handgrip performance and muscle coactivation between judo athletes and untrained young males. Method: The sample was 38 judo athletes and 38 untrained young males, between 12 and 15 years-old. Maturational status was evaluated by age at peak height velocity. A maximal isometric handgr...

The objective of this study was to analyze the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomized conditions divided...

Nunes, ACCA, Cattuzzo, MT, Faigenbaum, AD, and Mortatti, AL. Effects of integrative neuromuscular training and detraining on countermovement jump performance in youth volleyball players. J Strength Cond Res XX(X): 000-000, 2019-The purpose of this study was to analyze the effect of integrative neuromuscular training (INT) on countermovement vertica...

BACKGROUND: Sports competitions are significant sources of psychophysiological stress, especially for young athletes submitted to competitions in a congested match schedule. OBJECTIVE: In order to verify the effect of short recovery periods (24-hours) in the subsequent match, the response of salivary cortisol (sC) and match intensity were investiga...

We compared physiological and psychological responses between low-volume high-intensity interval training (LV-HIIT) sessions with different work-recovery durations. Ten adult males performed two LV-HIIT sessions in a randomized, counter-balanced order. Specifically, 60/60 s LV-HIIT and 30/30 s LV-HIIT. Oxygen uptake (VO2), carbon dioxide output (VC...

A pesquisa tem como objetivo verificar se há diferenças da aptidão aeróbia entre os níveis 3 e 4 do estágio maturacional púbere em atletas pareados por idade cronológica da categoria sub-15 de um time profissional de futebol. A amostra foi constituída de 18 indivíduos eutróficos, com 15 anos de idade, participantes regulares do treinamento de futeb...

BACKGROUND: Small-sided games (SSG) are widely used in soccer due its potential to improve technical, tactical and physical performance. Different approaches are used to modify physical demands during SSG. Despite this, little is known about the impact of rule modifications on the internal load imposed to young soccer players. OBJECTIVE: This study...

Abstract: Objective: To analyze the competitive match internal load, stress tolerance, mood state and competitive recovery during four successive basketball matches within a three day-period. Methodology: Twelve volunteer university players (mean ± SD: age, 20.8 ± 2.1 years; height, 1.84 ± 0.1m; body mass, 83.2 ± 12.4 kg) participated in 4 matches...

It seems that dehydration may impair decision-making performance in athletes. Purpose: This study aimed to investigate the influence of dehydration on passing decision-making performance in soccer players. Method: Participants were 40 male soccer players (Mage = 22.3 ± 2.3 years) who agreed to participate in the study and were randomly assigned...

Stretching during warm-up has been widely discussed for exerting a possible influence on performance. Thus, the purpose of this study was to verify the influence of the Proprioceptive Neuromuscular Facilitation (PNF) in the explosive force (EF) and the jump resistance (JR) of athletes. Eight male basketball players (21 ± 5 years; 176 ± 0 cm; 74.93...

BACKGROUND: Despite the importance of knowledge regarding the effects of different warm-up strategies not much is known about these effects and specific strategies with respect to basketball players. OBJECTIVE: To analyze the effect of different warm-up strategies on two specific functional actions of basketball, countermovement jump, and speed. ME...

O estudo tem como objetivo correlacionar os resultados da idade óssea em meninos e meninas em diferentes métodos. Na metodologia para verificar a idade óssea, foram realizadas aferições de estatura, diâmetros de úmero e fêmur, perímetro corrigido de braço, dobra tricipital, idade cronológica para compor o modelo matemático, e raio-x de mão e punho...

RESUMO: O objetivo do presente trabalho foi avaliar o nível de estresse, recuperação e a carga interna, em atletas universitários, ao longo de uma semana com jogos e sessões de treinamento. Participaram do estudo 10 atletas universitários (22 ± 2,6 anos 87,6 ± 11,4 kg; 1,9 ± 0,1 m; 25,5 ± 3 kg/m 2 ;). Para análise do estresse e recuperação foram ut...

Objective: monitor the competitive internal load through session-rating of perceived exertion (session-RPE) method, and the signs and symptoms of stress in school children under-17 during three consecutive basketball matches. Method: sample consisted of ten basketball players (16.2 ± 0.78 years; 173.8 ± 6.77 cm; 68.3 ± 9.80 kg). Stress signs and sy...

The aim of the present study was to evaluate the internal training load and its association with signs and symptoms of respiratory tract infections (ssURTI) and stress tolerance in 26 under-18 soccer players during four weeks of training in preparation for a state championship. The Rating of perceived exertion of the session (RPE-session) was used...

Moreira, A, Mortatti, AL, Arruda, AFS, Freitas, CG, de Arruda, M, and Aoki, MS. Salivary IgA response and upper respiratory tract infection symptoms during a 21-week competitive season in young soccer players. J Strength Cond Res 28(2): 467-473, 2014-Sports training and competition are significant sources of stress, especially for young athletes. I...

Objective The changes in young people at ages preceding the peak height velocity (PHV) can influence their performance in sports. Taken this issue into account, this study aimed to analyze the effect of maturity level on body composition and motor performance in young soccer players. Methods The 45 subjects were divided into three groups according...

Objective. The changes in young people at ages preceding the peak height velocity (PHV) can influence their performance in sports. Taken this issue into account, this study aimed to analyze the effect of maturity level on body composition and motor performance in young soccer players. Methods. The 45 subjects were divided into three groups accordin...

Objective. The changes in young people at ages preceding the peak height velocity (PHV) can influence their performance in sports. Taken this issue into account, this study aimed to analyze the effect of maturity level on body composition and motor performance in young soccer players. Methods. The 45 subjects were divided into three groups accordin...

O objetivo desse estudo foi avaliar os efeitos agudos de combates de Muay Thai na composição corporal e em indicadores gerais de força em lutadores. Foram avaliados 9 atletas masculinos (25,55 ± 5,24 anos) com experiência superior a 8 anos de treinamento. Mensurou-se a massa corporal, porcentagem de gordura, circunferências, força rápida e resistên...

This study investigated the contribution of salivary testosterone (sT) concentration, years from peak height velocity (YPHV) and height by body mass interaction on jumping performance (Countermovement jump; CMJ) and aerobic fitness (Yo-Yo intermittent endurance test, level 1) in young elite soccer players. Forty-five participants (age: 12.5 ± 0.5y;...

RESUMO O objetivo desse estudo foi avaliar os efeitos agudos de combates de Muay Thai na composição corporal e em indicadores gerais de força em lutadores. Foram avaliados 9 atletas masculinos (25,55 ± 5,24 anos) com experiência superior a 8 anos de treinamento. Mensurou-se a massa corporal, porcentagem de gordura, circunferências, força rápida e r...

The present study examined the effect of a 20-day period of competition on salivary cortisol, mucosal immunity, and upper respiratory tract infections (URTI) in young male soccer players (n = 14). The players were monitored during the main under-19 Brazilian soccer championship, in which 7 matches were played in 20 days. Saliva samples were collect...

To analyze the relationship between cardiorespiratory fitness (CRF) and indicators of body adiposity in adolescents of both sexes. Methods: Seventy eight subjects (45 boys and 33 girls) they were appraised as for the body mass, height and triceps and subscapular skinfolds thickness. Body mass index (BMI) and the sum of two skinfolds thickness they...

A análise dos componentes principais (ACP) foi utilizada para verificar as associações entre testes motores e medidas antropométricas, sumarizando em fatores as variáveis investigadas (salto vertical com e sem o contramovimento, salto horizontal, salto horizontal triplo consecutivo lado direito e esquerdo, corrida de 20m, teste do quadrado, teste d...

RESUMO O estudo objetivou: a) observar a dinâmica da performance motora (PERF) e variáveis morfológicas (VM) em 76 basquetebolistas do sexo masculino de 11 a 16 anos de idade (AI); b) identificar as diferenças entre as categorias (CA); c) analisar a relação entre PERF e VM. Recorreu-se à ANOVA e à regressão múltipla, com nível de significância de 5...

Many are the studies that analyze the process health-sickness though biological patterns. Although, the evidences of the relations between health and social and cultural matters are strong. The objective of this study is identify the body composition patterns, meaning anthropometrics, age and movement ones, among 40 children and teenagers, matching...

The present study aims to analyze the possible alterations in the components of somatotype in male adolescents inserted in a systematized soccer training program, considering the stage of maturation in comparison to non-trained individuals. The sampler was composed by 39 subjects, with age between 11 and 13 years old, divided into two groups, being...