The Finishing Space Value for Shooting Decision-Making in High-Performance Football.

Football players' decision-making behaviours near the scoring target (finishing situations) emerge from the evolving spatiotemporal information directly perceived in the game's landscape. In finishing situations, the ball carrier's decision-making about shooting or passing is not an individual decision-making process, but a collective decision that is guided by players' perceptions of match affordances. To sustain this idea, we collected spatiotemporal information and built a model to quantify the "Finishing Space Value" (FSV) that results from players' perceived affordances about two main questions: (a) is the opponent's target successfully reachable from a given pitch location?; and (b) from each given pitch location, the opposition context will allow enough space to shoot (low adversaries' interference)? The FSV was calculated with positional data from high-performance football matches, combining information extracted from Voronoi diagrams (VD) with distances and angles to the goal line. FSV was tested using as a reference the opinion of a "panel of expert" (PE), composed by football coaches, about a questionnaire presenting 50 finishing situations. Results showed a strong association between the subjective perception scale used by the PE to assess how probable a shot made by the ball carrier could result in a goal and FSV calculated for that same situation (R2=0.6706). Moreover, we demonstrate the accuracy of the FSV quantification model in predicting coaches' opinions about what should be the "best option" to finish the play. Overall, results indicated that the FSV is a promising model to capture the affordances of the shooting circumstances for the ball carrier's decision-making in high-performance football. FSV might be useful for more precise match analysis and informing coaches in the design of representative practice tasks.

On finding one's way: a comment on Bock et al. (2024).

In a recent issue of Psychological Research, Bock, O., Huang, J-Y., Onur, O. A., & Memmert, D. (2024). The structure of cognitive strategies for wayfinding decisions. Psychological Research Psychologische Forschung, 88, 476-486. https://doi.org/10.1007/s00426-023-01863-3 .) investigated cognitive strategies purported to guide wayfinding decisions at intersections. Following experimentation in a virtualised maze, it was concluded that intersectional wayfinding decisions were based on a 'generalized cognitive process', in addition to 'strategy-specific' processes. The aim of our comment is not to challenge these findings or their methodological rigour. Rather, we note how the study of human wayfinding has been undertaken from entirely different metatheoretical perspectives in psychological science. Leaning on the seminal work of James Gibson and Harry Heft, we consider wayfinding as a continuous, integrated perception-action process, distributed across the entire organism-environment system. Such a systems-oriented, ecological approach to wayfinding remediates the organismic asymmetry pervasive to extant theories of human behaviours, foregrounding the possibility for empirical investigation that takes seriously the socio-cultural contexts in which inhabitants dwell.

Understanding the visual search strategies of expert and novice coaches in futsal set pieces.

Introduction: This study aimed to describe the fixation location and the time of the longer fixation of expert and novice futsal coaches before the ball was in play in futsal set pieces. Methods: A total of 10 experts (ages 48 ± 5) and 10 novice coaches (ages 40 ± 7) participated in the study. They observed that 38 video clips were created to mimic the attack and defensive set-piece moments of the game. Data were collected in a standardized video analysis task using the pupil invisible eye tracker and processed through the pupil cloud platform. The Mann-Whitney test was conducted to evaluate differences in gaze duration between game moments (attack and defense set pieces) and groups (expert vs. novice). Gaze duration was also compared for gaze location between groups. For further comparisons, the game moments (attack and defense set pieces) and the gaze location were summarized in two-dimensional graphics using correspondence analysis. Results and discussion: The results revealed higher values of gaze duration for attack and defense set pieces for the group of experts than for novices. When considering gaze duration, expert coaches had higher values than novices for the attacker 3, defender 3, barrier 1st, and barrier 2nd gaze locations. The correspondence analysis showed different strategies of visual search and, consequently, gaze locations for attack and defense set pieces. In particular, there was different correspondence for free kicks between the level of expertise and gaze location, while corner and sideline kicks revealed some correspondence between the groups and the gaze location. In free kicks, coaches should be particularly concerned about the relationship between attacker and defender three and the barrier 1st and 2nd line positions. In corner and sideline kicks, coaches should be particularly aware of the relationship between attackers' and defenders' positions.

The effects of nature-based vs. indoor settings on the adaptability, performance and affect of calisthenics exercisers. A registered report.

Comparisons of the beneficial effects of nature-based versus indoor physical activity have been extensively reported, but existing research addresses mainly aerobic activity (running, jogging), not resistance or mixed (aerobic and resistance) exercise. It is unclear if the psychological benefits extend to functionality, i.e., if participants perform their activities better in nature, and how movement is expressed in nature-based and indoor environments, during similar exercise. The present registered report was a randomized controlled trial investigating how engaging in similar resistance-based exercise (calisthenics) in nature-based and indoor settings differed in affective valence, perceived exertion, visual attention, movement adaptability, heart rate variability, and performance. Nature-based exercisers (N = 51) showed increased performance output than indoor exercisers (N = 53) (p < 0.001). There were no group differences in affective valence, perceived exertion, or visual attention. However, psychological states of nature-based exercisers showed stronger associations to performance output (r < 0.33) than those of indoor exercisers (r < 0.03). Nature-based exercisers' movement variability and structure, measured with non-linear and fractal techniques (Sample Entropy and Detrended Fluctuation Analysis), were more regular (p < 0.001) and more functionally adaptive (long-term Detrended Fluctuation Analysis, p = 0.022) to achieve better performance output. Heart rate variability measures were not different between groups. Distinct environments can influence movement adaptability in a calisthenics exercise routine, and ultimately contribute to better performance. These results show how action is specific to task environment, and how action implies not only the task, but also the characteristics of the environment. TRIAL REGISTRATION: NCT05090501 (Clinicaltrials.gov). Registered October 21, 2021.

On a Corresponsive Sport Science.

In our societally extractive age, sport science risks being swept up in the intensifying desire to commodify the experiences of those that scientists proclaim to study. Coupled with the techno-digital revolution, this stems from a vertical (onto)logic that frames the sporting landscape as a static space filled with discrete objects waiting for us to capture, analyse, re-present and sell on as knowledge. Not only does this commodification degrade primary experience in the false hope of epistemological objectivity, it reinforces the unidirectionality of extractivism by setting inquirer apart from, and above of, inquiry. Here, we advocate for a different, more sentient logic grounded in the relationality of gifting as understood in indigenous philosophies. This foregrounds an ecological orientation to scholarship that sets out neither to objectify or describe that which is of concern, but to correspond with its becoming. On this, there are three threads we cast forward. First, in a corresponsive sport science, inhabitants are not objects of analysis, but lines in-becoming, who in answering to others, form knots in a meshwork. These knots constitute communal places in which inhabitants have joined with the differentiating coming-into-being of others. Second, knowledge is not authoritatively (re)cognitive, but humbly ecological; not produced vertically through imposition, but grown longitudinally in responsively moving from place to place. Third, research does not follow a vertically extractive (onto)logic, but is a practice of participant observation. This perspective appreciates that we, sport scientists, are also lines in-becoming that form parts of the knots in which we seek to know. In coda, our thesis is not a call for more qualitative or applied research in the sport sciences. It is a call to response-ably open up to that which sparks our curiosity, answering to what is shared with care, sensitivity and sincerity.

Perceived self-efficacy by Under-10 tennis players when scaling the equipment and play area.

The modification of child-sports aims to develop an optimal learning environment that facilitates the emergence of desirable psychological outcomes (e.g., self-efficacy). The aim of the study was to assess the effect of reducing net height and court size on self-efficacy and shot-efficacy of U-10 tennis players in a real-game context. Twenty U-10 tennis players (M = 9.46, SD = 0.66 years of age; M = 3.65, SD = 1.53 years of tennis experience) played two round-robin tournaments one week apart in the same order and schedule. The first tournament was played under the International Tennis Federation's Tennis 10s regulation at green stage (GT). Afterwards, the modified tournament (MT) was played with the same regulation GT, however, net height (0.91 m-0.80 m) and court size (23.77 m × 8.23 m-18.00 m × 8.23 m) were reduced. Results accomplished using Bayesian and Frequentist inferences showed an increase in players' self-efficacy when serving in MT than GT (BF10 = 4.796; δ = -0.576; and p = .011). This is increase may be due to a reduction in their serving faults in MT (BF10 = 6.169; δ = -0.591; and p = .010). Therefore, reducing net height and court size enhances the serve performance and self-efficacy and thus promotes positive tennis experiences.

Ubiquitous skill opens opportunities for talent and expertise development.

In this article we aim to define and present the complementary nature of talent, skill and expertise. Human daily life is replete with expressions of skillful behaviours while interacting with the world, which in specific socio-culturally defined domains, such as sport and work, demand a specialization of such ubiquitous skill. Certain manifestations of ubiquitous skill are identified by experts from the specialized domain of sport with the label of "talent". In this paper we propose that "talent" is thus socially defined, considered identifiable at an early age and forms the basis for selection and entry at the starting point in domains like sport. Once an individual, defined as "talented" enters the "pathway" for participating in the sport domain, there begins an intense socialization process where training, evaluation, institutionalization and framing takes place for continued development of such talent. This is the formalised process of working on ubiquitous skills refining and changing them into specialized skills in sport. An ecological dynamics rationale is used to explain that this specialization approach is developed through a process of expert skill learning, which entails the stages of exploration and education of intention stabilization and perceptual attunement, and exploitation and calibration. Skill learning aims to develop potentiality and its expression in actuality, i.e., how learning is expressed in contextualized expert performance.

Translation and Construct Validity of the Feeling Scale and the Felt Arousal Scale in Portuguese Recreational Exercisers / Traducción y Validez de Constructo de la Feeling Scale y la Felt Arousal Scale en Ejercitadores Recreativos Portugueses / Tradução e Validade de Constructo da Feeling Scale e Felt Arousal Scale em Praticantes Portugueses de Exercício Recreacional

La Feeling Scale y la Felt Arousal Scale son escalas ampliamente utilizadas en la investigación del deporte. En este estudio, las escalas originales fueron traducidas del inglés al portugués. Posteriormente, se comprobó si las puntuaciones de afecto y activación en el Self-Assessment Manikin, una escala basada en imágenes, predecían las puntuaciones en la Feeling Scale y en la Felt Arousal Scale en 47 deportistas recreativos portugueses, antes y después de una sesión de ejercicio. El Self-Assessment Manikin mostró correlaciones de moderadas a fuertes con la Feeling Scale (r = 0.70 y r = 0.56, p < 0.01) y la Felt Arousal Scale (r = 0.65 y r = 0.72, p < 0.01), y un poder predictivo sustancial sobre la Feeling Scale (R2 = 47% y R2 = 31%) y la Felt Arousal Scale (R2 = 42% y R2 = 52%). En base a este estudio, la Feeling Scale y la Felt Arousal Scale demostraron ser instrumentos válidos para medir el afecto y la excitación en los ejercitantes recreativos portugueses. (AU)

The Feeling Scale and Felt Arousal Scale are widely used in sport research. They provide a practical assessment of self-reported affect and arousal during exercise. The original scales were translated from English to Portuguese. Afterward, it was tested if the affect and arousal scores in the picture-based Self-Assessment Manikin predicted the scores in the Feeling Scale and the Felt Arousal Scale in 47 Portuguese recreational exercisers, before and after an exercise session. Self-Assessment Manikin showed moderate-to-strong correlations with the Feeling Scale (r = 0.70 and r = 0.56, p < 0.01) and the Felt Arousal Scale (r = 0.65 and r = 0.72, p < 0.01), and substantial predictive power over the Feeling Scale (R2 = 47% and R2 = 31%) and the Felt Arousal Scale (R2 = 42% and R2 = 52%). The Feeling Scale and Felt Arousal Scale are valid instruments to measure affect and arousal in Portuguese exercisers. (AU)

A Feeling Scale e a Felt Arousal Scale são amplamente utilizadas na investigação em desporto. Fornecem uma avaliação prática dos estados psicológicos de afeto e da ativação durante o exercício. Neste estudo, as escalas originais foram traduzidas do inglês para português. Posteriormente, testou-se se a pontuação do afeto e da ativação na Self-Assessment Manikin, uma escala baseada em imagens, previa a pontuação na Feeling Scale e na Felt Arousal Scale em 47 desportistas recreativos portugueses, antes e depois de uma sessão de exercício. A Self-Assessment Manikin mostrou correlações moderadas a fortes com a Feeling Scale (r = 0.70 e r = 0.56, p < 0.01) e com a Felt Arousal Scale (r = 0.65 e r = 0.72, p < 0,01), e um poder preditivo substancial sobre a Feeling Scale (R2 = 47% e R2 = 31%) e a Felt Arousal Scale (R2 = 42% e R2 = 52%). A Feeling Scale e a Felt Arousal Scale são instrumentos válidos para medir o afeto e a ativação em desportistas recreativos portugueses (AU)

Joining with the Conversation: Research as a Sustainable Practice in the Sport Sciences.

What would it mean to consider research in the sport sciences as a sustainable practice? Taking a step back, in such a context, what would sustainability even mean? The time is ripe to address such questions, and what we lay out here are our initial thoughts on this most contemporary of issues. We start by exploring what is meant by the term 'sustainability'. Rather than following mainstream thinking-the harnessing of earthly resources commodified and exploited as 'renewables'-we situate it in the sport sciences as a continuing response-ability to the experiences of others. This view is rooted in 'commoning'-an intransitive verb in which people conjoin varied experiences through correspondence. What makes this sustainable, is its ongoing open-endedness; meaning, it carries on as people (co)respond to one another. Central to this idea is a perceptual system attuned to the ebbs and flows of what or who one is corresponding with. Though, the current modus operandi of research in the sport sciences is located, not on the skilled perception of the scientist corresponding with the coming-into-being of phenomena, but on an unsustainable model of recognition that views phenomena as 'objects of analysis', fixed and final in form, waiting to be known about by means of reduction, fragmentation and classification. For research in the sport sciences to become a sustainable practice, we propose a scholarship that prioritises direct observation and participation with what holds our attention, corresponding within its natural ecology of relations, embedding the phenomenon itself. This re-conceptualisation of science views research as a response-able scholarship grounded in conversation. Like inquiring about the well-being of loved ones, what sustains such a scholarship is curiosity, care and hope-a curiosity about which captivates us, a care that sees us respond to what we observe, and a hope of carrying the correspondence on, together.

An ecological dynamics perspective on designing urban nature environments for wellbeing and health-enhancing physical activity.

The latest World Health Organization report on green and blue space and mental health (2021) calls for greater, and better, urban nature environments, i. e., "wilder" urban parks, tree-laden sidewalks, and overall presence of nature in the urban environment. Evidence shows that living close to and interacting with nature promotes benefits to numerous health and well-being indicators. The present article narratively reviews what are the aspects of urban nature environments that enhance health and wellbeing markers, which aspects are preferred among users and visitors of urban nature environments, and how can the benefits for health and wellbeing be understood from a theoretical perspective. Finally, guided by the ecological dynamics framework, suggestions are put forward on how designers and planners of urban nature environments can consider affordances to promote physical activity behavior, health and wellbeing; and how exercise and health researchers and professionals may channel the interaction of individuals with the nature environment in their interventions and programs.

Match Analysis in Team Ball Sports: An Umbrella Review of Systematic Reviews and Meta-Analyses.

BACKGROUND: Match analysis has evolved exponentially over the past decades in team sports resulting in a significant number of published systematic reviews and meta-analyses. An umbrella review of the available literature is needed to provide an integrated overview of current knowledge and contribute to more robust theoretical explanations of team performance. METHODS: The Web of Science (all databases), PubMed, Cochrane Library (Cochrane Database of Systematic Reviews), Scopus, and SPORTDiscus databases were searched for relevant publications prior to 19 February 2021. Appraisal of the methodological quality of included articles was undertaken using the tool for Assessing the Methodological Quality of Systematic Reviews (AMSTAR-2). Twenty-four studies were reviewed that met the following criteria: (1) contained relevant data from match analyses in team ball sports; (2) were defined as systematic reviews or/and meta-analyses; and (3) were written in the English language. RESULTS: The overall methodological quality of the 24 included reviews, obtained through the AMSTAR-2, revealed very low confidence ratings (Critically Low, n = 12) for the results of most systematic reviews of match analyses in team ball sports. Additionally, the results showed that research is focused mainly on four levels of analysis: (1) dyadic (microlevel); (2) individual (molecular level; predominant); (3) group (mesolevel), and (4) team dynamics (macrolevel). These levels of analysis included tactical, technical, physical, and psychosocial variables. Team performance was contextualized at two levels, with reference to: (1) match context (e.g. match status, match location, match period, quality of opposition) and (2) sociodemographic and environmental constraints (sex, age groups, competitive level, altitude, temperature, pitch surface). CONCLUSIONS: The evolution of methods for match analysis in team ball sports indicates that: (1) an individual-level performance analysis was predominant; (2) the focus on intermediate levels of analysis, observing performance in dyadic and group interactions, has received less attention from researchers; (3) neglected areas of research include psychosocial aspects of team sports and women's performance; and (4) analyses of match contexts need greater depth. REGISTRATION: The protocol was registered in the International Platform of Registered Systematic Review and Meta-Analysis Protocols with the number 202080067 and the DOI number https://doi.org/10.37766/inplasy2020.8.0067 .

Cystic Lung Disease as a Sequela of Severe COVID-19: Case Series.

Coronavirus disease 2019 (COVID-19) presented in December 2019 and has persisted since. The global pandemic has given rise to a novel acute disease process with a continually rapidly increasing prevalence of chronic disease and associated complications. There is minimal information on the long-term pulmonary complications of this disease. We present a series of 9 patient case reports and their respective imaging admitted with COVID-19 acute respiratory distress syndrome (ARDS) to highlight the cystic lung disease complications which may arise due to severity and disease progression. Our aim is to raise awareness of the sequela of COVID-19 ARDS, including its potentially catastrophic long-term consequences to the respiratory tract involving cystic lung disease.

Benefits to Performance and Well-Being of Nature-Based Exercise: A Critical Systematic Review and Meta-Analysis.

Prior reviews point to the superior benefits of exercising in nature vs in conventional indoor venues, particularly in terms of well-being. However, physical exercise performance, neither in terms of efficacy nor efficiency, has not been sufficiently addressed by past reviews of this topic. Therefore, we conducted both a systematic review and meta-analysis of the experimental literature that relates to differences in exercise performance and well-being between exercising in nature and in conventional indoor venues. Forty-nine relevant studies─the outcome data of which were used for the systematic review─were located within the Web of Science, PubMed, and Scopus databases. The meta-analyses, using data from twenty-four of the relevant studies, revealed no significant overall environmental effect on task performance efficacy outcomes (p = 0.100). For nature-based exercise, however, marginally positive cognitive performance outcomes (p = 0.059), lower ratings of perceived exhaustion (p = 0.001), and higher levels of vigor (p = 0.017) were observed, indicating higher performance efficiency. As for the effects of environment on well-being, positive affect was significantly higher for nature-based exercise (p = 0.000), while perceived stress was significantly higher for indoor exercise (p = 0.032). These results must, however, be interpreted with caution. High levels of bias and between-study heterogeneity were observed. Nonetheless, given several noticeable trends in the results, it may be that exercising in nature enhances the efficiency of exercise task performance to a greater extent than does indoor exercise.

From Optical Tracking to Tactical Performance via Voronoi Diagrams: Team Formation and Players' Roles Constrain Interpersonal Linkages in High-Level Football.

Football performance behaviour relies on the individual and collective perceptual attunement to the opportunities for action (affordances) available in a given competitive environment. Such perception-action coupling is constrained by players' spatial dominance. Aiming to understand the influence of team formation and players' roles in their dynamic interaction (interpersonal linkages), Voronoi diagrams were used to assess the differences in players' spatial dominance resulting from their interactions according to ball-possession status in high-performance football. Notational (i.e., team formation, players' role, and ball-possession status) and positional data (from optical sensors) from ten matches of the men's French main football league were analysed. Voronoi diagrams were computed from players' positional data for both teams. Probability density functions of the players' Voronoi cell areas were then computed and compared, using the Kolmogorov-Smirnov test, for the different variables (i.e., team formation, player role, and ball-possession status) and their classes. For these variables, the players' Voronoi cell areas presented statistical differences, which were sensitive to team formation classes (i.e., defenders, midfielders, and forwards) and relative pitch location (interior or exterior in the effective play space). Differences were also found between players with similar roles when in different team formations. Our results showed that team formation and players' roles constrain their interpersonal linkages, resulting in different spatial dominance patterns. Using positional data captured by optical sensors, Voronoi diagrams can be computed into compound variables, which are meaningful for understanding the match and thus offer information to the design representative training tasks.

From a Technology That Replaces Human Perception-Action to One That Expands It: Some Critiques of Current Technology Use in Sport.

Information technology has been integrated into most areas of sport, providing new insights, improving the efficiency of operational processes, and offering unique opportunities for exploration and inquiry. While acknowledging this positive impact, this paper explores whether sufficient consideration has been directed towards what technology risks detracting from the learning and developmental experiences of its users. Specifically, viewed through the philosophical lens of the device paradigm, and considering a more ecological account of technological implementation, we discuss how technology use in sport could subtly disengage educators and applied sports scientists from performance environments. Insights gleaned from such an ecological account of technology implementation could lead sports science and educational teams to ask and reflect on tough questions of current practice: i.e. has too much control been given to technological devices to 'solve' problems and communicate knowledge (about) in sport? Has technology improved the skills of players and performance staff? Or are performance staff at risk of becoming over-reliant on technology, and as a result, reducing the value of experiential knowledge (of) and intuition? Questions like these should be asked if technological devices, purported to support aspects of practice, are continually integrated into the sporting landscape.

Neurobiological tensegrity: The basis for understanding inter-individual variations in task performance?

Bernstein's (1996) levels of movement organization includes tonus, the muscular-contraction level that primes individual movement systems for (re)organizing coordination patterns. The hypothesis advanced is that the tonus architecture is a multi-fractal tensegrity system, deeply reliant on haptic perception for regulating movement of an individual actor in a specific environment. Further arguments have been proposed that the tensegrity-haptic system is implied in all neurobiological perception and -action. In this position statement we consider whether the musculoskeletal system can be conceptualized as a neurobiological tensegrity system, supporting each individual in co-adapting to many varied contexts of dynamic performance. Evidence for this position, revealed in investigations of judgments of object properties, perceived during manual hefting, is based on each participant's tensegrity. The implication is that the background organizational state of every individual is unique, given that no neurobiological architecture (musculo-skeletal components) is identical. The unique tensegrity of every organism is intimately related to individual differences, channeling individualized adaptations to constraints (task, environment, organismic), which change over different timescales. This neurobiological property assists transitions from one stable state of coordination to another which is needed in skill adaptation during performance. We conclude by discussing how tensegrity changes over time according to skill acquisition and learning.

Weaving Lines of Inquiry: Promoting Transdisciplinarity as a Distinctive Way of Undertaking Sport Science Research.

The promotion of inter- and multidisciplinarity - broadly drawing on other disciplines to help collaboratively answer important questions to the field - has been an important goal for many professional development organisations, universities, and research institutes in sport science. While welcoming collaboration, this opinion piece discusses the value of transdisciplinary research for sports science. The reason for this is that inter- and multidisciplinary research are still bound by disciplinary convention - often leading sport science researchers to study about a phenomenon based on pre-determined disciplinary ways of conceptualising, measuring, and doing. In contrast, transdisciplinary research promotes contextualised study with a phenomenon, like sport, unbound by disciplinary confines. It includes a more narrative and abductive way of performing research, with this abduction likely opening new lines of inquiry for attentive researchers to follow. It is in the weaving of these lines where researchers can encounter new information, growing knowledge in-between, through, and beyond the disciplines to progressively entangle novel and innovative insights related to a phenomenon or topic of interest. To guide innovation and the development of such research programmes in sport science, we lean on the four cornerstones of transdisciplinarity proposed by Alfonso Montuori, exemplifying what they could mean for such research programmes in sport science.

The Poor "Wealth" of Brazilian Football: How Poverty May Shape Skill and Expertise of Players.

Worldwide, 1.3 billion people live in Poverty, a socio-economic status that has been identified as a key determinant of a lack of sports participation. Still, numerous athletes around the world have grown up in underprivileged socio-economic conditions. This is the case in Brazil, a country with around 13.5 million impoverished citizens, yet, over decades, many of its best professional footballers have emerged from its favelas. In this article, we explore the role of the socio-cultural-economic constraints in shaping the development of skill and expertise of Brazilian professional football players. The methodological and epistemological assumptions of the "Contextualized Skill Acquisition Research" (CSAR) approach are used as an underpinning framework for organizing and analyzing data. Results suggested that, at the exosystemic level of Brazilian society, Poverty emerges as an influential constraint that can potentially enrich football development experiences of Brazilian players. Poverty, however, is not the direct causation of outstanding football skill development. Rather, from the perspective of ecological dynamics, Poverty creates specific contexts that can lead to the emergence of physical as well as socio-cultural environment constraints (e.g., Pelada, Malandragem) that can shape affordances (opportunities) for skill acquisition. These ideas suggest the need to ensure that environmental constraints can support people to amuse themselves cheaply, gain access to employment opportunities and maintain health and well-being through (unstructured and more structured) sport and physical activities in dense urban environments such as favelas, inner city areas, and banlieues. For this purpose, design of open play areas and even parkour installations can provide affordances landscapes for physical activity and sports participation in urban settings.

The relationship between serious leisure and recreation specialization in sportspeople with and without physical disabilities.

This study analyzes whether the relationship between serious leisure and recreation specialization differs for federated sportspeople with and without physical disabilities. Sportspeople with and without physical disabilities in the Basque Country (Spain) (n = 370) completed a questionnaire assessing the component dimensions of two constructs, "serious leisure" and "recreation specialization". The Serious Leisure Inventory and Measure (SLIM) and the Recreation Specialization Index (RSI) were used in the analysis. Results showed an association between these concepts in competitive sports in both samples. However, the magnitudes of association between the total of both concepts were higher in the group with physical disabilities. Regarding perceptions about their sports practice, the group without physical disabilities showed higher levels of specialization but there were no substantial differences between their levels of serious leisure participation. In conclusion, seriousness and specialization were found to be key issues for sportspeople's practice of leisure, regardless of their physical condition.

Optical Investigation of Essential Oils Using Absorbance and Photoluminescence.

Essential oils are complex mixtures of organic substances with large commercial importance in the pharmaceutical, food, fragrance, and cosmetic industries due to their organoleptic and biological properties. Also, these materials are also luminescent what has taken several studies about its potential uses for the detection and quality control of essential oils, imaging, and for the investigation of the synergies of their constituents. Concerning this, the present work is dedicated to studying the optical properties of selected essential oils: citronella (Cymbopogon winterianus), Japanese mint (Mentha arvensis), clove bud (Syzygium aromaticum), and bergamot (Citrus bergamia). We carried out a comparative study of the photoluminescence and the ultraviolet-visible optical absorption (abs-UV-Vis) of these essential oils with their typical constituents. To inspect the effects of the intermolecular interactions on the optical response of these systems, mixtures between the essential oils constituents following the expected average percent mass fraction were also studied. From these experiments, the main results were bathochromic effects in the abs-UV-Vis spectra; excimer formation in citral, isopulegol, isomenthone, eugenol, and eugenyl acetate; excimer emission enhancing and specific solvent effect in the essential oils photoluminescence spectra. These results contribute to the knowledge of essential oils' applications, especially in the evaluation of components' interactions through a simple abs-UV-Vis assay.