Sports venue digital twin technology from a spectator virtual visiting perspective.

The purpose of this article is to adopt a customer-centric perspective the and introduce digital twin technology as a solution for mega-sport event management. This conceptual model article focuses on the potentially drastic role of digital twin technology in modern sports events, explaining in detail different aspects of its impact. The main research question is "How (and why) do sports venue digital twin emerging technologies prospectively impact the sports spectators" customer experiences?" It contributes to understanding how and why sports venue digital twins make events more customer-centred by enhancing fan experiences and engagement. Subsequently, it aims to position digital twin technology as an innovative solution for mega-sport event management across various customer experience touchpoints. By examining the intersection of digital twins and sports events from a customer-centric lens, this article will elucidate the intricacies involved in leveraging this emerging technology to transform stakeholder and fan experiences at major sporting events. Finally, we outline and explain the obstacles, challenges, opportunities, and perspectives of digital twin technology at an intersection with sports events from a customer-centric perspective. The use of digital twins potentially enables the creation of hyper-realistic virtual replicas of sports venues, providing immersive and personalized experiences for spectators. This technology allows event organizers to optimize resource allocation, streamline logistics, and improve operational efficiency.

Current Surge of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) Variants in China Could Be Threatening as the Asian Games 2023 Flags Off in September: Foolproof Cautionary Measures Are Suggested.

Despite normalcy having almost returned in the lives of people throughout the world post-coronavirus disease-19 (COVID-19) pandemic caused by the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), the danger still looms over the fears of development and propagation of a newer SARS-CoV-2 variant. The movement of people globally has reached the pre-pandemic level, and this augmentation increased surveillance regarding the emergence of lethal SARS-CoV-2 variants. International sports events are among the potential avenues where the virus could cause serious impact. Therefore, the organization of such events should be planned and executed meticulously to avoid viral transmission and minimize the health effects of infections on the sportspersons and the local people. Additionally, there could be dissemination of the infections to the native countries of the participants and visitors while they return to their homes. Through this editorial, we prompt caution to the organizers and the event-hosting nation's administration regarding the potential threat and suggest measures to avoid any medical emergencies related to COVID-19.

International biathlon season during the COVID-19 pandemic was based on frequent on-site PCR-testing protocol with rapid result management.

The resumption of professional sports during the COVID-19 pandemic has been described in team sports but less in individual sports. The International Biathlon Union implemented a COVID-19 concept for the 2020-2021 season aimed to mitigate the risks of transmission by rules designated for the professional biathlon environment. The "bubble" model was based on regular reverse transcript polymerase chain reaction (PCR) testing with rapid results and efficient result management protocol. The objective of this study was report incidence and transmission of SARS-CoV-2 among professional biathletes and staff undergoing frequent PCR testing and risk reduction measures during the international season 2020-2021. The efficiency of risk mitigation measures was also evaluated based on the incidence data. During the 4-month season, altogether 22,182 SARS-CoV-2 PCR tests were conducted on all individuals participating in international biathlon season (athletes, team staff and organizing committee). Ninety-six (0.4%) PCR tests were positive and 30% of the positive PCR tests were considered "persistent positive" following recovery from a recent COVID-19 infection. No transmission events were detected following contact with "persistent positive" cases during the season. A great majority of the positive PCR tests were recorded during the first days after arrival in the "bubble", often in the first entry test taken by the on-site laboratory. In conclusion, a "bubble model" based on frequent PCR testing and hygiene rules was efficient in keeping the infection rate low. The competition activity including international travel was safe, and most of the infections seemed to originate from outside of the "bubble".

Voleibol escolar: caracterização das escolas/municípios participantes dos jogos escolares de Santa Catarina / School volleyball: characterization of the schools/municipalities participating in the Santa Catarina school games

RESUMO O ambiente escolar tem contribuído no processo de desenvolvimento esportivo, especialmente pela oferta diversificada de atividades nas aulas de Educação Física e em projetos extracurriculares voltados às modalidades esportivas. O trabalho realizado com as equipes escolares de voleibol no estado de Santa Catarina tem sido altamente reconhecido ao longo dos anos, porém há poucas evidências sobre as escolas que têm contribuído na formação de jogadores de voleibol no cenário catarinense. Assim, o objetivo do estudo foi caracterizar as escolas participantes dos Jogos Escolares de Santa Catarina (JESC) de voleibol. Realizou-se a análise documental dos boletins dos JESC disponibilizados pela Fundação Catarinense de Esporte (FESPORTE). As evidências revelaram que os estabelecimentos de ensino com maiores participações e conquistas, em ambas as categorias investigadas, são escolas de educação básica da rede estadual, seguidas pelas instituições de ensino da rede privada e, em menor número, por escolas municipais. Enquanto na categoria feminina as escolas estão localizadas em sua grande maioria nas regiões Leste-Norte e Sul, na categoria masculina concentram-se na região Centro-oeste, especialmente em cidades de pequeno e médio porte, com elevado Índice de Desenvolvimento Humano (IDH).

ABSTRACT The school environment has contributed to the sports development process, especially due to the diversified offer of activities in Physical Education classes and extracurricular projects focused on sports. The work done with school volleyball teams in the state of Santa Catarina has been highly recognized over the years, but there is little evidence about schools that have contributed to the training of volleyball players in the Santa Catarina scenario. Thus, this study aimed to characterize the schools participating in the Jogos Escolares de Santa Catarina (JESC, Santa Catarina School Games) of volleyball. The documentary analysis of the JESC bulletins provided by the Fundação Catarinense de Esporte (FESPORTE, Santa Catarina Sports Foundation) was carried out. The evidence revealed that the educational establishments with the highest participation and achievements in both categories investigated were basic education schools of the state school system, followed by private educational institutions and, to a lesser extent, municipal schools. While in the women's group, the schools were mostly located in the East-North and South regions, in the men's group, they were concentrated in the Midwest region, especially in small and medium-sized cities with high Human Development Indices (HDIs).

Risks, Epidemics, and Prevention Measures of Infectious Diseases in Major Sports Events: Scoping Review.

BACKGROUND: Major sports events are the focus of the world. However, the gathering of crowds during these events creates huge risks of infectious diseases transmission, posing a significant public health threat. OBJECTIVE: The aim of this study was to systematically review the epidemiological characteristics and prevention measures of infectious diseases at major sports events. METHODS: The procedure of this scoping review followed Arksey and O'Malley's five-step methodological framework. Electronic databases, including PubMed, Web of Science, Scopus, and Embase, were searched systematically. The general information (ie, publication year, study type) of each study, sports events' features (ie, date and host location), infectious diseases' epidemiological characteristics (ie, epidemics, risk factors), prevention measures, and surveillance paradigm were extracted, categorized, and summarized. RESULTS: A total of 24,460 articles were retrieved from the databases and 358 studies were included in the final data synthesis based on selection criteria. A rapid growth of studies was found over recent years. The number of studies investigating epidemics and risk factors for sports events increased from 16/254 (6.3%) before 2000 to 201/254 (79.1%) after 2010. Studies focusing on prevention measures of infectious diseases accounted for 85.0% (238/280) of the articles published after 2010. A variety of infectious diseases have been reported, including respiratory tract infection, gastrointestinal infection, vector-borne infection, blood-borne infection, and water-contact infection. Among them, respiratory tract infections were the most concerning diseases (250/358, 69.8%). Besides some routine prevention measures targeted at risk factors of different diseases, strengthening surveillance was highlighted in the literature. The surveillance system appeared to have gone through three stages of development, including manual archiving, network-based systems, and automated intelligent platforms. CONCLUSIONS: This critical summary and collation of previous empirical evidence is meaningful to provide references for holding major sports events. It is essential to improve the surveillance techniques for timely detection of the emergence of epidemics and to improve risk perception in future practice.

Antecedents and Outcomes of Social Capital: Evidence from a Professional Baseball Franchise.

PURPOSE: The empirical paper aimed to develop a theoretical model of social capital in professional spectating sports by investigating the antecedents and outcomes related to social capital from the spectator's viewpoint. PARTICIPANT AND METHOD: Brothers Elephants, a professional baseball franchise in the Chinese Professional Baseball League, provided the research setting. The study's participants consisted of 422 spectators of a Brothers Elephants game at its home field, Taichung Intercontinental Baseball Field. Around half of the participants were male; 46.4% of them aged between 30 and 39 years old. Data analysis was conducted through structural equation modeling. RESULTS: Results revealed that social interactions positively correlated with social capital, prosocial behavior, and spectator intention to re-attend the sporting event. Corporate social responsibility (CSR) also positively predicted intention to re-attend the sporting event, social capital, and prosocial behavior. Social capital significantly correlated with prosocial behavior and subjective well-being, and prosocial behavior significantly correlated with subjective well-being and intention to re-attend the sporting event. CONCLUSION: The results suggest that social capital can be developed through social interactions and perceived CSR in the context of professional spectator sporting events, with such social capital increasing, in turn, prosocial behavior, subjective well-being, and intention to re-attend the sporting event. From perspective of practical implication, professional sports franchise can develop more campaigns that boost sports spectators' perceived social interactions and CSR, which can increase their social capital, prosocial behavior, subjective well-being, and their intention to re-attend the sporting event.

Os jogos olímpicos Rio/2016 como evento esportivo na cobertura esportivo-midiática da Folha de São Paulo / Rio 2016 olympic games as a sports event in the sports media coverage of Folha de São Paulo

Este estudo teve como objetivo interpretar e analisar como o Jornal Folha de São Paulo retratou os Jogos Olímpicos Rio 2016 como evento esportivo na cobertura esportivo-midiática da Folha de São Paulo. Este artigo é resultado de uma pesquisa qualitativa descritiva, tendo como corpus o Jornal Folha de São Paulo, referente às edições de 1º de julho a 30 de setembro de 2016. A análise deu-se através de períodos temporais, de acordo com o que estava acontecendo em cada período. A cobertura do pré-evento muito se preocupou com o término das estruturas e se o país tinha condições de sediar JO. Por outro lado, a cobertura durante o evento mostrou que o país tinha condições de sediar megaeventos. Por fim, a cobertura do pós-evento retratou o legado que os jogos deixaram para o país sede das OlimpíadasRio-2016.

This study aimed to interpret and analyze how the newspaper Folha de São Pauloportrayed Rio 2016 Olympic Games as a sports event in the sports media coverage of Folha de São Paulo. This paper is the result of a qualitative descriptive research, using as corpusthe newspaper Folha de São Paulo, editions from July 1stto September 30thof 2016. The analysis was carried out through time periods, according towhat was happening in each period. The pre-event coverage was really concerned about the structure completion and whether the country was ready to host the OG. On the other hand, the coverage during the event showed that the country had the ability to host mega-events. Lastly, the post-event coverage portrayed the legacy that the games left to the host country of Rio 2016 Olympics.

Respiratory Hospitalizations and Their Relationship with Air Pollution Sources in the Period of FIFA World Cup and Olympic Games in Rio de Janeiro, Brazil.

BACKGROUND: From 2010 onwards, the city of Rio de Janeiro has undergone changes related to the 2014 FIFA World Cup and the 2016 Olympic Games, potentially affecting the respiratory health of inhabitants. Thus, the spatial distribution of respiratory hospitalizations (2008-2017) and the relationship between this outcome and potential air pollution sources in the city of Rio de Janeiro (2013-2017) were evaluated. METHODS: An ecological study was performed using the Bayesian model with multivariate Poisson regression for the period of the sporting events (2013-2017). The outcome was the ratio of hospitalizations for respiratory diseases by the population at risk. Data analysis was performed in the total population and by sex and age group. The air pollution-related variables included industrial districts, traffic density, tunnel portals, a seaport, airports, and construction/road work. RESULTS: All explanatory variables, except tunnel portals, were associated with an increase in the outcome. Construction/road work showed a greater magnitude of association than the other pollution-related variables. Airports were associated with an increased hospitalization ratio among the ≥60 year-old group (mean = 2.46, 95% credible intervals = 1.35-4.46). CONCLUSION: This study allows for a better understanding of the geographical distribution of respiratory problems in the city of Rio de Janeiro. Present results may contribute to improved healthcare planning and raise hypotheses concerning exposure to air pollution and respiratory hospitalizations.

Evaluación de la calidad percibida de los programas de voluntariado deportivo universitario al contexto mexicano: Universiada Nacional / Avaliação da percepção da qualidade dos programas de voluntariado desportivo universitário no contexto mexicano: Universiade Nacional / Evaluation of the perceived quality of university sports volunteering programs in the Mexican context: National Universiade

El objetivo de la presente investigación es validar una herramienta que permita evaluar la calidad percibida de los programas del voluntariado universitario al contexto deportivo mexicano. Para el análisis de los datos se utilizó el software estadístico SPSS v.22 y el programa LISREL 8.8. Se realizaron los análisis de consistencia interna, análisis factorial exploratorio (AFE) y análisis factorial confirmatorio (AFC) con dos muestras distintas. El instrumento utilizado fue el QVOLSPORT mx, el cual está compuesto por 49 ítems y 6 factores: 1. Organización del voluntariado, 2. Responsables de área, 3. Tareas específicas del área, 4. Logística, 5. Instalación y materiales y 6.Valoración personal. El muestreo fue intencional por conveniencia, los participantes son voluntarios deportivos universitarios de la Universiada Nacional del año 2017 y 2019 de ambos géneros. Se aplicó a una muestra de 778 participantes distribuida en 378 participantes en la Universiada del año 2017, donde 252 fueron hombres y 126 mujeres, mientras que para la Universiada del año 2019 participaron 400, donde 238 son hombres y 162 mujeres, con un rango de edad entre 18 y 31 años (M = 21.18). Los resultados mostraron que el Alfa de Cronbach por factores está por encima de .70; los indicadores de pertinencia fueron adecuados, los 6 factores obtenidos explican el 59.60% de la varianza total. Los índices de ajuste y de error son satisfactorios, CFI = 0.982, NNFI= 0.981 y RMSEA = 0.057, por lo que el modelo ajusta. (AU)

The objective of this research is to validate a tool that allows evaluating the perceived quality of university volunteer programs in the Mexican sports context. For data analysis, the statistical software SPSS v.22 and the LISREL 8.8 program were used. The internal consistency analyzes, exploratory factor analysis (AFE) and confirmatory factor analysis (AFC) were performed with two different samples. The instrument used was the QVOLSPORT mx, which is composed of 49 items and 6 factors: 1. Organization of the volunteer work, 2. Person in charge of the area, 3. Specific tasks of the area, 4. Logistics, 5. Installation and materials and 6. Personal assessment. The sampling was intentional for convenience, the participants are university sports volunteers of the National Universiade of the year 2017 and 2019 of both genders. It was applied to a sample of 778 participants distributed in 378 participants in the 2017 Universiade, where 252 were men and 126 women, while for the 2019 Universiade 400 participated, where 238 were men and 162 women, with a range of age between 18 and 31 years (M = 21.18). The results showed that Cronbach's Alpha by factors is above .70; the indicators of relevance were adequate, the 6 factors obtained explain 59.60% of the total variance. The fit and error indices are satisfactory, CFI = 0.982, NNFI = 0.981 and RMSEA = 0.057, so the model fits. It is concluded that the QVOLSPORT mx instrument has adequate psychometric properties and meets the needs of sports volunteering in the universitycommunity, enabling continuous improvement in sports volunteering programs. It is confirmed that the instrument is valid to evaluate the perceived quality of university sports volunteering programs in the Mexican sports context. (AU)

O objetivo desta pesquisa é validar uma ferramenta que permite avaliar a qualidade percebida dos programas de voluntariado universitário no contexto esportivo mexicano. Para a análise dos dados, foram utilizados os softwares estatísticos SPSS v.22 e LISREL 8.8. As análises de consistência interna, análise fatorial exploratória (AFE) e análise fatorial confirmatória (AFC) foram realizadas com duas amostras diferentes. O instrumento utilizadofoi o QVOLSPORT mx, que é composto por 49 itens e 6 fatores: 1. Organização do trabalho voluntário, 2. Responsável pela área, 3. Tarefas específicas da área, 4. Logística, 5. Instalação e materiais e 6. Avaliação pessoal. A amostragem foi intencional por conveniência, os participantes são voluntários do esporte universitário da Universiade Nacional dos anos de 2017 e 2019 de ambos os sexos. Foi aplicado a uma amostra de 778 participantes distribuídos em 378 participantes na Universiade 2017, sendo 252 homens e 126 mulheres, enquanto na Universiade 2019 participaram 400, sendo 238 homens e 162 mulheres, com faixa etária entre 18 e 31 anos (M = 21,18). Os resultados mostraram que o Alfa de Cronbach por fatores está acima de 0,70; os indicadores de relevância foram adequados, os 6 fatores obtidos explicam 59,60% da variância total. Os índices de ajuste e erro são satisfatórios, CFI = 0,982, NNFI = 0,981 e RMSEA = 0,057, então o modelo se ajusta. Concluise que o instrumento QVOLSPORT mx apresenta propriedades psicométricas adequadas e atende às necessidades do voluntariado esportivo na comunidade universitária, possibilitando a melhoria contínua nos programas de voluntariado esportivo. Confirmase que o instrumento é válido para avaliar a qualidade percebida de programas de voluntariado esportivo universitário no contexto esportivo mexicano. (AU)

Os jogos do Instituto Federal do Paraná: um estudo sobre as percepções e práticas dos coordenadores de ações esportivas / The games of the Federal Institute of Paraná: a study on the perceptions and practices of sports action coordinators / Los juegos del Instituto Federal de Paraná: un estudio sobre las percepciones y prácticas de los coordinadores de acción deportiva

Este estudo objetivou analisar as percepções e práticas dos coordenadores de ações esportivas do IFPR sobre os Jogos do Instituto Federal do Paraná. Trata-se de uma pesquisa qualitativa descritiva, na qual foi aplicada uma entrevista semiestruturada com os quatro coordenadores envolvidos com a gestão dos JIFPR no período de 2010 a 2021. Os dados foram categorizados e analisados mediante a análise de conteúdo. Por meio dos discursos foi possível apreender-se as construções, as relações e a importância deste evento no contexto ao qual se insere. Os resultados evidenciam que os coordenadores possuem percepções positivas em relação ao evento associadas à importância para a formação integral dos alunos, para suprir uma lacuna e dar visibilidade à instituição. As práticas dos coordenadores, associadas ao planejamento e gestão do evento, por um lado seguem um rito desde a criação dos Jogos e, por outro, buscam inovações para atender as demandas de cada edição.

This study aimed to analyze the perceptions and practices of the IFPR sports action coordinators about the Games of the Federal Institute of Paraná. This is a descriptive qualitative research, in which a semi-structured interview was applied with the four coordinators involved with the management of the JIFPR from 2010 to 2021. Data were categorized and analyzed through content analysis. Through the speeches, it was possible to apprehend the constructions, relationships and importance of this event in the context in which it is inserted. The results show that the coordinators have positive perceptions about the event associated with its importance for the integral education of students, to fill a gap and give visibility to the institution. The coordinators' practices, associated with the planning and management of the event, on the one hand follow a rite since the creation of the Games and, on the other, seek innovations to meet the demands of each edition.

Este estudio tuvo como objetivo analizar las percepciones y prácticas de los coordinadores de acción deportiva de la IFPR sobre los Juegos del Instituto Federal de Paraná. Se trata de una investigación descriptiva cualitativa, en la que se aplicó una entrevista semiestructurada con los cuatro coordinadores involucrados con la gestión de la JIFPR de 2010 a 2021. Los datos fueron categorizados y analizados mediante análisis de contenido. A través de los discursos fue posible aprehender las construcciones, relaciones e importancia de este evento en el contexto en el que se inserta. Los resultados muestran que los coordinadores tienen percepciones positivas del evento asociadas a su importancia para la educación integral de los estudiantes, para llenar un vacío y dar visibilidad a la institución. Las prácticas de los coordinadores, asociadas a la planificación y gestión del evento, por un lado siguen un rito desde la creación de los Juegos y, por otro, buscan innovaciones para satisfacer las demandas de cada edición.

Undokai and sports events in the Japanese school system.

BACKGROUND: Japanese schools hold annual sports events in which all pupils participate. These events include activities such as walking, running, and swimming competitions. METHODS: We analyzed literature on school sports events in Japan. RESULTS: In addition to the physical education classes, which are part of the curriculum, Japanese schools hold annual sports events in which all pupils participate. These school events include activities such as walking, running, swimming, and ball game competitions, skiing, and climbing. School sports events offer participants an opportunity for holistic education as well as cultivating a variety of virtues such as cooperation, a sense of solidarity, teamwork, and responsibility. A popular sports event held countrywide is undokai. Undokai has a style that is unique to Japan. They usually take one day and include individual and group competitions. The pupils participate in a variety of activities including a foot race, relay race, group gymnastics, and group activities. The undokai is an important event in both the school and its surrounding community. The potential benefit of undokai is often considered in terms of social capital. However, the competitive nature of undokai may generate negative feelings in the children who participate. CONCLUSIONS: Further research on the potential of sports events such as undokai is necessary.

Corrida de São João de Braga: qualidade de serviços e intenções de recomendação dos participantes / São João de Braga running: service quality and intention of recommendation from participants / Carrera de São João de Braga: calidad de servicios e intenciones de recomendación de los participantes

O objetivo deste estudo passou pela análise da qualidade dos serviços e a consequente intenção de recomendação da corrida de São. João de Braga e da região de Braga, como destino turístico, por parte dos participantes. A amostra foi de 284 participantes, tendo sido usado um instrumento que já foi utilizado noutros estudos desta mesma temática. Para analisar os dados e verificar a relação existente entre as variáveis foram realizados testes de regressão linear múltipla. Os principais resultados evidenciaram o processo de acreditação e o kit de participação como preditores estatisticamente significativos ao nível das intenções de recomendação da corrida e o processo de acreditação e a paisagem circundante para as intenções de recomendação da região. Posto isto, aquando da avaliação da qualidade dos serviços, destaca-se o processo de acreditação, uma vez que é um preditor comum das intenções de recomendação do evento e da região.

The aim of this study was to analyze the quality of services and the consequent intention of recommending the race of São João de Braga and the region of Braga, Portugal, as a tourist destination, by the participants. The sample consisted of 284 participants, using an instrument that has already been used in other studies of this same subject. To analyze the data and verify the relationship between the variables, multiple linear regression tests were performed. The main results evidenced the accreditation process and the participation kit as statistically significant predictors in the intentions of the race recommendation and the accreditation process and the surrounding landscape for the region's recommendation intentions. In conclusion, when assessing the quality of services, the accreditation process stands out, since it is a common predictor of the intentions of the event and the region

El objetivo de este artículo es analizar la calidad de los servicios y la consecuente recomendación de la carrera de São João de Braga y la región de Braga, Portugal, como destino turístico, por parte de los participantes. Una muestra de 284 participantes, se usó un instrumento ya utilizado de otros instrumentos de estudio de la temática. Para análisis de datos y verificación de la relación existente, se han realizado varios ensayos de regresión lineal. Los principales resultados son la evidencia o el proceso de acreditación y el kit de participación como predictores estadísticamente significativos a lo largo de las intenciones de recomendación y el proceso de acreditación y la distribución de datos para las intenciones de recomendación. En conclusión, el aval da evaluación da calidad dos servicios, destaca-se el proceso de acreditación, es posible que sea su predictor común das intenciones de recomendación do evento y da región.

Heart Rate Responses and Exercise Intensity During A Prolonged 4-Hour Individual Cycling Race among Japanese Recreational Cyclists.

Heart rate (HR) during different endurance cycling races and events are investigated for professional cyclist, however, enduro races to compete for total laps and distance covered within a fixed time using a circuit course has not yet been investigated. This study examined the heart rate (HR) and exercise intensity during an enduro cycling race. Ten male Japanese amateur cyclists performed cycling individually for at least 2 consecutive hours. HR was measured using an HR monitor during the race, and we estimated the energy expenditure (EE) during the race using the HR-VO2 relationship in advance. Exercise intensities were defined as percentages of HRmax based on ACSM exercise guideline as follows: moderate intensity, 64-76% HRmax; vigorous intensity, 77-95% HRmax. The HR during the race was 158.9 ± 10.6 bpm (86.4 ± 2.2% HRmax), and exercise intensity is categorized as vigorous intensity. The EE during the race using HR-VO2 relationship were 12.9 ± 1.2 kcal/kg/hr, which would require a large energy expenditure (EE) during the race. However, energy cost was 0.36 ± 0.04 kcal/kg/km regardless of total distance. The findings indicate that enduro cycling racing is categorized as vigorous intensity (>77% HRmax) for healthy male recreational cyclists though, cycling is an efficient form of transportation.

Data for Sochi 2014 Olympics discussion on social media.

Presented data is related to the research article "Sochi 2014 Olympics on Twitter: Perspectives of Hosts and Guests" [2].  The data were collected through regular API Twitter search for five months windowing 2014 Sochi Olympic Games and further used for cluster analysis and analysis of the sentiment on the Games. The main dataset contains 616 thousand tweets, rigorously cleaned and filtered to remove irrelevant content. To comply with the Twitter API user agreement, the dataset presented in this article includes only generalized daily data with all information contained in individual tweets removed. The proposed use of the dataset is academic research of changing discussion on the topics related to Mega-events in conjunction with political events.

The impact of user- and system-initiated personalization on the user experience at large sports events.

This article describes an experimental study investigating the impact on user experience of two approaches of personalization of content provided on a mobile device, for spectators at large sports events. A lab-based experiment showed that a system-driven approach to personalization was generally preferable, but that there were advantages to retaining some user control over the process. Usability implications for a hybrid approach, and design implications are discussed, with general support for countermeasures designed to overcome recognised limitations of adaptive systems.

THE RELATIONSHIP BETWEEN MUSCLE THICKNESS IN THE LOWER LIMBS AND COMPETITION PERFORMANCE IN WEIGHTLIFTERS AND SPRINTERS / 体力科学

This study aimed to investigate the differences in the development of muscle thickness (MT) in the lower limbs with specific sports-event training. Furthermore, the relationship between MT of the lower limbs for weightlifters and sprinters and their competition performances (total weight lifted and 100m sprint times) was examined. Subjects were 64 males divided into 3 groups: weightlifters (n=20), sprinters (n=20), and untrained subjects as controls (n=24). The MT{relative to (body weight)^1/3}of knee extensors (KE), knee flexors (KF), plantar flexors (PF) and dorsi flexors (DF) was measured at 21 sites (proximal, middle and distal) along the length of the upper and lower leg by B-mode ultrasound. The MT of KE for weightlifters was significantly greater than that for sprinters and controls, while the MT of KF and PF for sprinters was significantly greater than that for weightlifters and controls. The MT of rectus femoris (RF), vastus intermedius (VI), vastus lateralis (VL) and vastus medialis (VM) for weightlifters was significantly greater than that for sprinters and controls, while the MT of RF and VM for sprinters was greater than that of controls. On the other hand, the MT of KE for weightlifters and sprinters (especially VM) correlated significantly with competition performances. These results indicated that squatting affected the MT of KE except for RF while sprinting affected the MT of KF and PF. It was also concluded that the MT of KE for weightlifters and sprinters (particularly VM) was related to their competition performances.