Rui Marcelino

Universidade da Maia (University of Maia)

The purpose of this study was to determine the internal (heart rate) and external load (body load, distance covered and exertion index) during different types of unbalanced soccer small-sided games (SSG) in professional (PRO) and amateur (AMA) players. In two separated sessions (PRO and AMA) participants played three SSG formats (4vs3, 4vs5 and 4v7...

Abstract The main focus of this paper was to review the available literature on match analysis in adult male football. The most common research topics were identified, their methodologies described and the evolutionary tendencies of this research area systematised. A systematic review of Institute for Scientific Information (ISI) Web of Knowledge d...

The purpose of this study was to examine attack and serve performancesin the beginning and end of the initial and final sets of volleyball matches according to the quality of opposition. Six hundred rallies from the Men's World Cup 2007 were selectively sampled from a total of five thousand one hundred and seventeen rallies observed using video mat...

The aim of this study was to assess the effects of quality of opposition and match status on technical and tactical volleyball performances, as measured by block, attack, serve, and set actions related to the tasks, space, players, and efficacy of selected game actions. Twenty-five matches from the men's World Cup 2007 were notated and through clus...

Objective: Resistance training aids in the improvement of key aspects of athletic performance. Elastic bands are among the various instruments used to apply resistance load. Despite their popularity, scientific evidence supporting their efficacy in sports remains limited. This systematic review aimed to synthesize the existing literature regarding...

This study compared acceleration and deceleration demands between different training drills (compensation, rondos, small-sided games, technical) and matches, and between playing positions. Nineteen professional players were monitored during four microcycles. Efforts intensities were classified as low (25–50%), moderate (50–75%), and high (> 75%); s...

This study aimed to characterize match peak speeds, during a 20-second time window (10 seconds immediately before and after the match peak speed), in soccer matches. Twenty elite soccer players were monitored with global navigation satellite system (GNSS) devices during six soccer matches from the Brazilian first division. After identifying the pea...

Intermittent pneumatic compression (IPC) applied to lower limbs is becoming a popular post-exercise recovery technique; however, it still lacks strong scientific support. The purpose of this systematic review and meta-analysis was to analyse the effects of lower-limb IPC on sports recovery, as well as to identify the most used protocols to optimize...

Recent technological advancements have revolutionized the coaching process in football, elevating the strategic dimension of the game. Set pieces, and particularly corner kicks, have emerged as a crucial element that can determine the match outcome. For teams fighting for promotion in upper divisions, the use of corner kicks maybethen used an efe...

The demands placed on goalkeepers are often neglected in scientific research. This study seeks to evaluate the acceleration and deceleration requirements across various exercise categories: 'Complementary' (tailored training for goalkeepers separated from team drills), 'Integrated' (team-based drills not position-specific), and 'Specific' (exercise...

This study compared the differences in acceleration and deceleration demands between three different warm‐up (WU) strategies (Reaction speed [exercises with reaction to a stimulus], Run [self‐paced running], and Speed [exercises such as shuttle running or circuits]) applied to highly trained soccer players. Nineteen players were monitored for 4 wee...

Purpose This study aims to compare peak speeds, maximal accelerations, and decelerations during football matches and field tests among young players divided into age-categories (U15, U17, U19, and U21). Methods Performance variables were analyzed during competition across the season. Differences between groups of maximal speeds and accelerations c...

Introduction. Soccer players attribute particular importance to media and how newspapers portray their individual performances. However, these analysis can be biased and unfair to players. Aim of Study. This study analyzed how sport newspapers rated soccer players’ performances, comparing them to performance variables from a data-driven platform (S...

The aim of this study was to characterise football players’ acceleration and deceleration demands regarding duration, initial velocity, and effort magnitude without a minimum effort duration. Forty-two male professional players were monitored daily during four training weeks, using a global position system. Players were divided according to their p...

Quantifying training load is important to ensure that athletes correctly respond to training prescription and reduce injury risk. Training load can be divided into internal training load, the response of an individual to the training demand, and external training load, the physical “work” of the players. We aimed to analyze training load during a t...

Purpose: The aim of this review is to summarize the current scientific knowledge about acceleration and deceleration demands during football training. Methods: A systematic search of three electronic databases (PubMed, SPORTDiscus, Web of Science) was performed to identify peer-reviewed relevant English-language articles, following PRISMA guidel...

Objectives The aim of this study is to measure the reliability of InStat Scout data. Equipment and methods Six games of a Portuguese female football team were observed and data registered according to InStat Scout variables: pass, challenge, air challenge, tackle, dribble, cross, shot and key passes. Bland-Altman plots were used for all variables...

Collective behavior is a hallmark of every living system and utilizing methods from statistical physics (such as correlation functions) could aid in our understanding of their underlying rules. We analyzed five football (soccer) matches as this game provides a unique but yet mostly unexplored example to study a system of collective cooperation and...

Os testes de hipótese são amplamente empregados para análise de dados na área de ciência do esporte. Porém, existe um questionamento em relação a utilização desse método e a comunidade científica ainda procura soluções mais adequadas para a análise dos dados. De fato, esse tipo de análise não permite uma interpretação prática das mudanças observada...

To prepare their teams for upcoming matches, analysts in professional soccer watch and manually annotate up to three matches a day. When annotating matches, domain experts try to identify and improve suboptimal movements based on intuition and professional experience. The high amount of matches needing to be analysed manually result in a tedious an...

As investigações em ciências do esporte sustentam-se frequentemente em inferências baseadas na declaração de um valor estatisticamente significativo, ou não significativo, com base no valor de p que deriva dos testes de hipótese nula. Considerando que os estudos são iminentemente amostrais, o recurso aos testes de hipótese nula apenas possibilita e...

Crossfit® is a modality characterized by high-intensity functional exercises, which has been attracting an increasing number of adepts due to its highly competitive nature (Claudino et al., 2018). In this sense, it is important to monitor the effects of workload, to maintain performance and prevent non-functional overreaching (Gabbett et al., 2017)...

Crossfit® is a modality characterized by high-intensity functional exercises, which has been attracting an increasing number of adepts due to its highly competitive nature (Claudino et al., 2018). In this sense, it is important to monitor the effects of workload, to maintain performance and prevent non-functional overreaching (Gabbett et al., 2017)...

In beach volleyball as in other sports, the volume training decreases at the end of the preparation period before competition to improve technical-tactical aspects (Nakamura, Pereira, Abad, Franchini, & Loturco, 2016). Therefore, coaches focus on monitoring the training dose-response to quantify fatigue levels that might affect athletes’ performanc...

Palavras-chave: performance; potenciação pós ativação; esporte de combate INTRODUÇÃO: O Mixed Martial Arts (MMA) é caracterizado por esforços de alta intensidade que exige dos lutadores diferentes manifestações de força muscular. No que diz respeito a avaliação da força dinâmica, o teste de 1 repetição máxima (1 RM) é apontado como um método válido...

As investigações em ciências do esporte sustentam-se frequentemente em inferências baseadas na declaração de um valor estatisticamente significativo, ou não significativo, com base no valor de p que deriva dos testes de hipótese nula. Considerando que os estudos são iminentemente amostrais, o recurso aos testes de hipótese nula apenas possibilita e...

Success in soccer is much dependent on how players and teams create and restrict space and time. In match situations, players constitute small sub-groups to improve their collective synchronization and achievement of specific goals. This study aimed to identify changes in the effective playing space (EPS, defined as the smallest polygonal area deli...

The aim of the present study was to analyse the Japanese National Women’s Volleyball Team and to identify items differentiating it from other teams. All fifteen matches between the six National Teams (i.e., Japan, Brazil, China, Belgium, Turkey and Russia) competing at the Women’s Volleyball World Grand Prix Finals of 2014 were analyzed, in a total...

Performance in team sports is the result of a dynamic and interactive process between two opposing teams. The aim of this study was to examine the performance of volleyball players executing terminal actions (i.e. serve, attack, block and counter-attack) in terms of match quality. Three hundred and seven sets were selected randomly from U14s up to...

Relative Age Effect (RAE) has been extensively investigated with regard to sports1, but to our knowledge this topic has not focused yet on Olympic Volleyball players. This study aimed to examine the effects of RAE in Volleyball players in the final classification of Rio 2016 Olympic Games. A total of 288 Volleyball players from 19 countries who par...

Introduction: In beach volleyball, attack is considered the action through which teams score more1. Due to surface instability and weather conditions (e.g., wind, sun, 32 m2 per player), players often use either the spike or the shot. Therefore, they need to have a good efficacy using both. Purpose: To compare the efficacy between the types of atta...

This study aimed to compare beach volleyball performance indicators between winning and losing teams in different age groups. Game actions from the 2010 to 2011 Men’s World Championships were observed using video match analysis (6095 from under-19, 5138 from under-21 and 8705 from senior matches). Variables assessed were: number of points won in ea...

Physical Education (PE) classes plays a role helping students acquire long-lasting habits of physical activity that will improve their overall health. Improving flexibility, namely through hamstring stretching (HF), will help execute and sustain students' daily life motor activities (Kallerud & Gleeson, 2013). The objective of this study was to exa...

RESULTS Results showed differences between both levels for all variables especially when set type and periods were considered. EL exploited system stability in setting conditions and block opposition, but greater unpredictability in zone and tempo of attack. In decisional set, EL teams presented less variability in setting conditions and in attack...

The present article aims to review the available literature on match analysis in adult male Volleyball. Specific key words "performance analysis", "match analysis", "game analysis", "notational analysis", "tactical analysis", "technical analysis", "outcome" and "skills" were used to search relevant databases (PubMed, Web of Science, SportDiscus, Ac...

This study evaluated tendencies towards flexibility/stability of coordinated behaviours in international futsal teams, considered as complex collective systems, according to changes in opposition defensive formations. Six games of two international futsal teams (Spain and Portugal) were selected for Social Network Analysis to capture the coordinati...

Optimizing collective behaviour helps to increase performance in mutual tasks. In team sports settings, the small-sided games (SSG) have been used as key context tools to stress out the players’ awareness about their in-game required behaviours. Research has mostly described these behaviours when confronting teams have the same number of players, d...

The purpose of this study was to identify and classify the distribution of rally length in high-level men's volleyball, considering the set's characteristics (set number, set type, set status on the match, and set period). Particularly, we aimed to assess if a long rally can be considered a critical incident of the game by evaluating the outcome of...

It is easy to lie with statistics. It is hard to tell the truth without it. Andrejs Dunkels (1939–1998) Matemático Sueco, professor de Matemática e escritor. Introdução Em ciência, o conhecimento é adquirido com recurso ao método científico, a partir do qual se testam e confirmam repetidamente as evidências através da observação, experimentação (Po...

This study aims to describe the time–motion and physiological performance profiles of footballers whose ages are under 15 (U15), under 17 (U17), and under 19 (U19) during a typical week of a competitive season. A total of 151 elite Portuguese players U15 (age 14.0 ± 0.2; n = 56), U17 (age 15.8 ± 0.4; n = 66), and U19 (age 17.8 ± 0.6; n = 19) were m...

This study aims at analysing probabilistic relationships predicting the outcomes relating to attack players in elite-level men’s volleyball. Nineteen matches from the 2006 Men’s World Championships were notated and the tactical indicators regarded the space-, task-, player- and efficacy-related dimensions of selected game actions (reception, set an...

The aim of the present study was to assess effects of technique of execution, age and player's role on serve and attack efficacy. A total of 1.100 sen'es and 1.165 attacks from under-19, 927 serves and 1.015 attacks from umler-21, and 1.564 serves and 1.854 attacks from sénior were assessed through video match analysis. Techniques considered for se...

Introduction: Identifying leader-follower interactions using Directional Correlation Delay Time (DCDT) was successfully used to reveal the behavioural rules that govern phenomena of collective movement in animals (Akos, Beck, Nagy, Vicsek, & Kubinyi, 2014; Nagy, Akos, Biro, & Vicsek, 2010). In team sports, players could be considered as elements of...

Introduction Elite football imposes important demands on players and requires optimal adaptations during training sessions (Foster, 2001). Thus, monitoring the training process is critical to establish specific guidelines to enhance players' performances. Unfortunately, this information is poorly explored by literature. Similarly, there is little i...

Introduction Understanding the effects of task constraints during football SSG allows to optimize practice planning and performance. Using different balls to play is one of several possibilities often used to generate changes in motor skills variability and also in task intensity. Thus, the aim of this study was to identify the effects of using bal...

The present article aimed to perform a systematic review of the available literature in relation to the analysis of sports performance in beach volleyball from match analysis. Web of Science, SportDiscus®, PubMed, Scopus and Academic Search Complete databases were used to identify peer-reviewed published articles. The authors conducted a content an...

The aim of this study was to measure physical and physiological demands in beach volleyball (BV) during a game. Four professional BV players (aged: 31.0 ± 3.7; height: 188.00 ± 0.04 cm; weight: 81.3 ± 4.2 kg; playing experience: 11.5 ± 6.4 years) participated in this study. The data were gathered during a friendly game performed (3 sets) in an offi...

This study aimed to assess the effects of age groups and players’ role (blocker vs. defender specialist) in beach volleyball in relation to physical and temporal variables, considering quality of opposition. 1101 rallies from Under 19 (U19), 933 rallies from Under 21 (U21), and 1480 rallies from senior (senior) (Men’s Swatch World Championships, 20...

Introduction The aim of this study was to explore how the number of teammates (none, 2 and 4 teammates) affects the external and internal workload, when three professional and three amateurs footballers play small-sided games. Methods Six professional (age: 29.1 ± 3.2 years; height: 181.5 ± 7.4 cm; weight: 74.7 ± 6.8 kg) and six amateur football p...

Game analysis has an important role on the description of 'what happens' in competitions and should reach the ability to suggest new ways to enhance sport performances. In order to accomplish this goal is important that possible factors enables to influence these performances were considered. Quality of opposition is one of these factors. In this s...

Objective: The purpose of the present study was to translate and adapt the Pediatric Berg Balance Scale, an instrument for functional balance assessment, to Portuguese and to determine the reliability of scores obtained with the Portuguese adaptation. Method: Two persons proficient in English independently translated the original scale into Portugu...

Research in performance analysis in volleyball arose systematically in the literature in the 1990s. This chapter present the different conceptual perspectives used to study indoor volleyball and beach volleyball performance from notational analysis, while taking into account technical and tactical indicators. In this field, chronological analyses h...

Performance analysis is of fundamental importance to understand the factors underlying participation in top-level sports. Recently, an increased importance has been given to the preservation of the situation's ecology, thus attempting the comprehension of game patterns through the establishment of relationships between variables of several orders....

Game analysis has an important role on the description of ‘what happens’ in competitions and should reach the ability to suggest new ways to enhance sport performances. In order to accomplish this goal is important that possible factors enables to influence these performances were considered. Quality of opposition is one of these factors. In this s...

The present study aimed to identify in which performance indicators are there differences between the teams that win and lose the sets in Volleyball matches. Archival data were obtained from 65.949 game actions in 550 sets from the men’s 2005 World League. The “Volleyball Information System” was used for data gathering. Descriptive statistics were...

The purpose of this study was to examine the relationship between the opponent block, i.e. the blockers starting points and the number of blockers, compared to the hitter chosen by the setter to attack in elite male volleyball competition. 4531 sequences were analyzed, corresponding to 97 sets, of 12 national male teams participating in the 2007 Wo...