João Valente-Dos-Santos

João Valente-Dos-Santos
Universidade Lusófona de Humanidades e Tecnologias | ULHT · Faculdade de Educação Física e Desporto

PhD MSc

About

122
Publications
31,362
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Introduction
João Valente-dos-Santos, after obtaining a 5-year diploma in Sports Sciences, experienced an in-service training at the roller hockey department of Football Club Barcelona using Leonardo da Vinci program. Acted as Physical Educator while attending the Master in Youth Sports by the University of Coimbra and was granted by the Portuguese Foundation for Science and Technology: doctoral studies (PhD: SFRH/BD/64648/2009, 2001–2014; Post-PhD: SFRH/BPD/100470/2014, 2016–2018).

Publications

Publications (122)
Article
Full-text available
Rink hockey is a highly specialized and physiological demanding sport with sparse research regarding the game and athletes' characteristics. A cross-sectional study was developed to characterize the body composition and grip strength of elite male rink hockey players and to establish the relationship between ethnicity on body composition and grip s...
Article
Full-text available
Rink hockey is a highly specialized and physiological demanding sport with sparse research regarding the game and athletes' characteristics. A cross-sectional study was developed to characterize the body composition and grip strength of elite male rink hockey players and to establish the relationship between ethnicity on body composition and grip s...
Article
Full-text available
Background: Puberty is a period of intense changes in human body and, additionally, participation in sports is viewed as prominent form of physical activity among male adolescent athletes. The current study was aimed to examine the intra-individual changes in body composition and bone tissue during years of maximal growth and the effect of 12-mont...
Article
The primary purpose of this study was to exploring instruments properties of two achievement goal orientation questionnaires and to determine if the subscales are measuring related concepts. A secondary purpose was to examine motivational climate among Ultimate Frisbee (UF) players according to different divisions. Data was collected during the Eur...
Article
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The reactive strength index (RSI) describes the individual’s capability to quickly change from an eccentric muscular contraction to a concentric one and can be used to monitor, assess, and reduce the risk of athlete’s injury. The purpose of this review is to compare the effectiveness of different training programs on RSI. Electronic searches were c...
Article
The purpose of this paper was to review the available literature on match analysis in rink hockey. To be included in this review, the publications should have been written in English or Portuguese, have contained relevant data about match analysis in rink hockey, and have been published as original papers, reviews, book chapters, or academic works....
Article
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The purpose of this study to analyze dispositional orientations among Ultimate Frisbee (UF) athletes according to different divisions. Data was collected during the European Beach Ultimate Championship (EBUC) 2019. The sample comprised a total of 484 athletes (34.7±9.7 years of age), from 19 countries. Participants were asked to fill in a sociodemo...
Article
Growth and maturation are central concerns in the organization of training and competitions in youth sports. This study examined maturity-associated variation in body size and adiposity among adolescent girls participating in competitive age group youth soccer. The sample included 441 players 10.08-16.73 years of age. Stature and body mass were mea...
Article
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Introduction: Ultimate Frisbee (UF) is a non-contact, challenging, and self-promoted team sport. Some factors such as the game environment and rules seem to influence athletes' behavior. Goals: Provide a robust systematic review (SR) of the psychological domains associated with UF. Methods: A SR according to Cochrane guidelines was completed. A rep...
Article
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Ultimate Frisbee (UF) is a non-contact, challenging, and self-promoted team sport. Its characteristics, such as the game environment and rules, appear to influence the on-the-pitch behaviour of players. This article examines the content of qualitative studies to determine if and how the unique characteristics of UF may be related to nine sociologic...
Article
Objective The purpose of the study was to evaluate the agreement between the Fels and Greulich‐Pyle methods for the assessment of skeletal age (SA) in female youth soccer players. Methods The sample included 441 Portuguese players 10.08–16.73 years of age who regularly participated in organized and competitive soccer. Standardized radiographs of t...
Article
A maturity-associated gradient among adolescent athletes in many sports tends to favour early maturing participants. This study was aimed to describe inter-individual variance in growth and skeletal maturation among male youth table tennis. The sample included 99 players registered in competitive clubs for at least 2 years. Chronological age (CA) r...
Article
The main objective of this research was to analyse the match context variables' influence on individual set-piece's success in rink-hockey. A sample of 196 matches, including 621 free direct hits (FDH) and 292 penalties (PEN) were analysed using logistic regression analysis. The results indicate that Match status has a significant effect on FDH and...
Article
Basketball is characterized by high-intensity episodes predominantly reliant on anaerobic metabolism. The force-velocity test enables individual determination of an optimal braking force and emerged as appropriate to estimate optimal peak power. It has rarely been used in youth basketball. This study aimed to examine the contribution of body size,...
Article
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Reported mean ages, heights and weights of female soccer players aged <19 years in 161 studies spanning the years 1992–2020 were extracted from the literature or calculated from data available to the authors; 35 studies spanning the years 1981–2020 also included an indicator of biological maturation. Heights and weights were plotted relative to U.S...
Poster
Full-text available
Literature regarding Ultimate Frisbee focused on the biomechanics of the throwing movement (Sasakawa et al., 2018), physiological responses during UF matches (Weatherwax et al., 2015), sociological impact (Leicht et al., 2019), coach education and coaching models (Croker, 2018), psychological characteristics (Griggs, 2009), and Spirit of the Game (...
Article
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Background Skeletal age (SA) is considered the best method of assessing biological maturation. The aim of this study was to determine intra-observer (reproducibility) and inter-observer agreement of SA values obtained via the Greulich-Pyle (GP) method. In addition, the variation in calculated SAs by alternative GP protocols was examined. Methods T...
Article
Sprint performance over short distances is a central component in young tennis players' development. This study aimed to examine the longitudinal development of sprint performance in young female tennis players, and to investigate differences between performance levels. Also potentially explanatory variables were investigated. Female tennis players...
Article
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Background and objectives: Athletes from combat sports are grouped into a series of weight categories that are intended to promote fair competition. Differences in performance are partly attributable to differences in body size. Consequently, ratio standards in which a performance variable is simply divided by an anthropometric characteristic such...
Article
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The aim of this study was to review the evolutionary tendencies of research regarding to the study of male Rink-Hockey players´ and game performance. A systematic search was conducted in PubMed, Web of Knowledge and Scopus databases according to PRISMA method. The initial search identified 815 titles, resulting in 19 articles being included within...
Article
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Background: The aim of the study was to examine the contribution of chronological age (CA), skeletal maturation, training experience and concurrent body size descriptors, to inter-individual variance in left ventricular mass (LVM) among female adolescent soccer players. Methods: The sample included 228 female soccer players 11.8-17.1 years. Trai...
Article
Purpose: This study determined the impact of menstrual status on bone tissue in elite post-pubertal female soccer players over an entire season. Methods: Fifty-one elite female soccer players participated. At baseline, forty-one were assigned to the low hormonal androgenic profile (low-HAPL) and 10 to the high hormonal androgenic profile (high-HAPL...
Article
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OBJECTIVE The current study aimed to examine the body composition of adult male ultra-trail runners (UTR) according to their level of participation (regional UTR-R, vs. national UTR-N). METHODS The sample was composed of 44 adult male UTR (aged 36.5±7.2 years; UTR-R: n=25; UTR-N: n=19). Body composition was assessed by air displacement plethysmogr...
Article
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The objective of the study was to examine the effects of the relative age effect (RAE) and predicted maturity status on body size and repeated sprint ability (RSA: 7 x 34.2 m / 25 s interval) in youth soccer. The sample was composed of 197 male players aged 13-14 years. Body mass, stature, and sitting height were measured, RSA was assessed in the f...
Article
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Objective: To compare tissue composition, total and regional bone mineral content and bone mineral density, static hand grip and knee joint isokinetic strength between amateur soccer players and Control Group. Methods: Cross-sectional study. Air displacement plethysmography was used to estimate body volume and, in turn, density. Body composition...
Article
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Objective: To evaluate cardiorespiratory fitness’ tracking from childhood to adolescence, as well as to test the moderation role of somatic maturation. Methods: Our sample was composed by 375 children (197 boys), with a baseline age between 7 and 10 years old. The children were followed-up over three years. Body mass and stature were measured as a...
Article
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Background This study aimed to determine the allometric exponents for concurrent size descriptors (stature, body mass and fat-free mass) and also to examine the contribution of chronological age and pubertal status combined with above mentioned size descriptors to explain inter-individual variability in the peak of oxygen uptake (VO2peak) among gir...
Article
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Background: The increasing prevalence of functionally-limited hypertensive individuals highlights the need for interventions to reduce the burden of hypertension-aging-disability and to maximize the chances of healthy aging. Aim: This study aims to compare the effects of multicomponent exercise and different pharmacological treatments on functio...
Article
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The purpose of this paper was to develop and validate an observational instrument tool for observing and analysing the activity of rink hockey goalkeepers. The development and validation of the observational instrument were carried out based on five methodological stages. The first and second phases were summarised in bibliographical research and a...
Article
The purpose of the study was to model the longitudinal development of knee extension (KE) and flexion (KF) strength in adolescent soccer players. A mixed-longitudinal sample composed of 67 soccer players aged 11.0–13.9 years at baseline was followed on three-to-five occasions over 5 years. Stature, body mass and several skinfold thicknesses were me...
Article
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Interrelationships among skeletal maturity status, body size, ventilator thresholds (VT) and peak oxygen uptake (VO2peak) were considered in 47 adolescent male soccer players aged 12.5–15.4 years. Body mass, stature, and the triceps and subscapular skinfolds were measured. The latter were used to estimate fat mass and fat-free mass. Skeletal age wa...
Article
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The current study aimed to examine the reliability of the conventional and functional ratios derived from peak torques (PTs) and those obtained from the combination of knee flexors torque at the angle of knee extensors PT. Twenty-six male athletes (mean of 24.0±0.7 years) from different sports completed a test-to-test variation in isokinetic streng...
Article
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OBJECTIVE: The current study was aimed to examine intra-individual variation on indicators of bone health in addition to whole-body plus appendicular tissue measurements using two concurrent assessments based on pencil beam and fan beam dual energy X-ray absorptiometry (DXA) systems in adult athletes from several sports. METHOD: Thirty-two male par...
Article
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Background: Exploring the osteogenic effect of different bone-loading sports is particular relevant to understand the interaction between skeletal muscle and bone health during growth. This study aimed to compare total and regional bone and soft-tissue composition between female adolescent swimmers (n=20, 15.71±0.93 years) and volleyball players (...
Article
This study aimed to examine longitudinal changes in isometric strength of the knee extensors (ImKE) and knee flexors (ImKF) at 30° and 60°. The sample was composed of 67 players aged 11.0–13.9 years at baseline over five years. Stature, body mass, skinfolds, and isometric strength (ImKE30°, ImKF30°, ImKE60° and ImKF60°) were measured. Fat mass and...
Article
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PURPOSE: The current study was aimed to examine the reproducibility of estimated peak power (PP) and estimated pedal velocity (PV) in a multi-trial 10-s all-out cycling test among adult athletes of different sports. METHODS: The sample comprised 22 adult male athletes (23.50±4.73 years). Stature, sitting height and body mass were measured. Leg len...
Article
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Introduction: Biological maturation has been related to the level of physical activity and motor competence of children. Objectives: This study aimed to: 1) analyze the association between biological maturation and performance in muscular strength tests and 2) examine whether the relationship between maturation and performance in physical tests is...
Article
Full-text available
Objective: The current study was aimed to examine intra-individual variation on indicators of bone health in addition to whole-body plus appendicular tissue measurements using two concurrent assessments based on pencil beam and fan beam dual energy X-ray absorptiometry (DXA) systems in adult athletes from several sports. Method: Thirty-two male...
Article
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Motor coordination and physical fitness are multidimensional concepts which cannot be reduced to a single variable. This study evaluated multivariate relationships among morphology, physical fitness and motor coordination in 74 pre-pubertal girls 8.0-8.9 years of age. Data included body dimensions, eight fitness items and four motor coordination ta...
Article
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The current study aimed to examine the reproducibility of estimated peak power and estimated pedal velocity in a multi-trial 10-s all-out cycling test among adult athletes (n = 22; aged 23.50±4.73 years). Stature, sitting height and body mass were measured. Leg length was estimated as stature minus sitting height. Body volume was obtained from air...
Article
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This study aimed to predict motor coordination from a matrix of biocultural factors for 173 children (89 boys, 84 girls) aged 7–9 years who were assessed with the Körperkoordinationtest für Kinder test battery. Socioeconomic variables included built environment, area of residence, mother’s educational level, and mother’s physical activity level (us...
Article
Background: This study aims to analyze the effects of anti-hypertensive monotherapy and combined therapy on functional status, and cardiovascular risk outcomes in older adults. Methods: This longitudinal non-randomized cohort study, involved hypertensive older adults (n = 440) aged 60 or more years with comorbidities. Participants underwent a co...
Article
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Background/purpose: Ageing has profound impact on the immune system, mainly on T-cells. However, it has been suggested that chronic exercise may delay immunosenescence. Master athletes represent an interesting sub-demographic group to test this theory since they maintain a high training frequency and load throughout life. The purpose of this study...
Article
This study aimed to examine the independent and combined effects of pubertal and weight status on concurrent measurements of peak oxygen (VO2peak) in school aged adolescent males. The final sample included 49 boys (12.3 ± 0.8 years). VO2peak was derived from an incremental progressive maximal protocol using a motorized treadmill. In addition, maxim...
Article
Full-text available
Exploring the effect of non-impact and impact sports is particular relevant to understand the interaction between skeletal muscle and bone health during growth. The current study aimed to compare total and regional bone and soft-tissue composition, in parallel to measurements of blood lipid and inflammatory profiles between adolescent athletes and...
Article
Introduction: During the past decades, increased TV viewing and reduced physical activity (PA) levels may have contributed to the increased prevalence of pediatric obesity. This study aimed to analyze the association between TV viewing and central adiposity risk in Portuguese children. Methods: The sample comprised 3987 children (1997 girls and...
Article
This study compared maturation, body composition and physical fitness between youth soccer athletes with different technical skills levels. Sixty-two young athletes (11-17 years) were categorized dichotomously in more skilled (n=31) and less skilled (n=31) groups based on 3 specific technical tests (Dribbling Speed Test [DST], Shuttle Dribble Test...
Article
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Objective: The idea that different sports and physical training type results in different cardiac adaptations has been widely accepted. However, this remodelling process among different sport modalities is still not fully understood. Thus, the current study aims to investigate the heart morphology variation associated with a set of different modali...
Article
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Erratum Following the publication of this article [1] it was brought to our attention that the affiliation for author Susana C. Póvoas is incorrect and for author Daniel A. Marinho incomplete. Susana C. Póvoas is erroneously affiliated with the Research Centre in Sport and Physical Activity, Maia Institute of Higher Education, Maia, Portugal. The a...
Article
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The purpose of the current study was to evaluate the contribution of chronological age (CA), matura-tion, body size, and annual volume training to the longitudinal changes in aerobic performance and soccer-specific skills in youth soccer goalkeepers aged 11–18 years. A total of 16 goalkeepers were annually followed over a minimum of 3–5 years (4.4...
Article
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This study examined power output on jumping and sprinting tests in young soccer players of differing pubertal status, while controlling for body size with allometric scaling exponents. A total of 46 males aged 12–18 years (14.17 years) were divided into three groups: pre-pubescent (n = 12), pubescent (n = 22), and post-pubescent (n = 12). Participa...