Lactate was considered a dead-end waste product of glycolysis due to lack of oxygen. Accumulating lactate in the muscle and blood was viewed only as a major cause of muscle fatigue and tissue damage. Furthermore, buildup of lactate due to glycogen re-synthesis is thought to cause excess oxygen consumption (oxygen debt) after exercise. However, research has also shown lactate to be an important mediator in numerous metabolic processes and a fuel for aerobic metabolism. Lactate is not metabolic waste, but a major player in cellular and whole body metabolism. Lactate can be used within the cell (intracellular lactate shuttle) or be transported through the cytoplasm or blood to be used by other cells (cell-cell lactate shuttle). Lactate shuttle hypothesis has helped in identifying and understanding the link between the glyoclyic and oxidative pathways, and identified lactate as a major energy source and gluconeogenic precursor. Therefore, the purpose of this review was to better understand the physiological roles of lactate at rest and during exercise, and the concept of lactate shuttle with implications for clinical practice.
Purpose The purpose of this study was to examine the changing trends of swimsuit perception by using SNS big data. Methods By using “swimsuit” and “swimsuit brand” as key words, data was searched through blogs, cafes, Jisiksin(Tip), news, and web documents provided by naver and daum. This study used 2 years of data from January 1st, 2014 to December 31st, 2015 and social matrix program Textom was used for extracting matrix data and analyze them for frequency. To visualize data networking, NetDraw of UCINET6 program was used. Results Through analyzing the popular link words to the key words, it was known that the key words were 'swimsuit brand', 'children's swimsuit', 'rash guard', 'women's swimsuit', and 'model' in the order in 2014, and ‘swimsuit brand', 'rash guard', 'children's swimsuit', 'women's swimsuit', and 'Arena’ in the order in 2015. Second, the median of connectivity values showed that it was high in ‘swimsuit brand', 'women's swimsuit', 'children's swimsuit', 'rash guard', and 'Arena’ in the order in 2014, and ‘swimsuit brand', 'rash guard', 'women's swimsuit', 'children's swimsuit', and 'Arena’ in the order in 2015. Third, th results of CONCOR analysis demonstrated that ‘female customer’, ‘couple swimsuit’, 'rash guard', ‘brand’, 'children's swimsuit', and ‘fashion’ were grouped in 2014, and ‘brand’, ‘fashion’, 'rash guard', ‘purchase factor', and 'children's swimsuit' were grouped in 2015.
The purpose of this study was to investigate the research trends on school sports clubs using the Content Analysis and Network Text Analysis. Data included 137 journal articles published from 2007 to 2016 and were analysed using SPSS 20.0, KrKwic software and the NetDraw of UCINET 6 program.The results were as follows. First, the number of research articles on school sports clubs were increased since 2012. Second, research studies using mixed subjects were most popular in comparison to more narrow target population. Third, the mixed methods approach was less utilised in comparison to quantitative and qualitative research methods. Fourth, correlational studies were more frequently used while multivariate analyses were less common in terms of statistical methods. Fifth, satisfaction, policy, and leader were the most frequently used keywords among the keywords provided by journal articles. Lastly, the results of Network Text Analysis indicated that school sports clubs and user satisfaction showed the highest degree centrality, closeness centrality, and betweenness centrality.
This study aims to visualize the data regarding the entire rally and the final 5 strokes in a badminton single match and to present its analysis method using the parallel coordinate system. For this study, were used the videos of three games of the final, semifinal, quarterfinal in the '2014 National Fall Badminton Championship’ where the L Player of Gyeonggi C university won championship. Herein, the data was collected utilizing a tagging technique of Dartfish (Ver 8.0), in terms of shuttlecock ball direction, judgment of final kill stroke, and used technique. The data collected were classified and condensed using Excel 2013 program, and the parallel coordinates, which is provided with free open source through D3js.org, was utilized as a data visualization tool. As the results; first, the entire rally of single matches in badminton was visualized; second, as an analysis method of data visualization in relation to final 5 strokes, game pattern analysis, attack success course analysis by players and techniques, attack failure course analysis by players and techniques, and a plurality of selected condition analysis by players and techniques could be presented. In future, when processing subsequent studies that can provide us together with numerically analyzed data as well as visualization through a parallel coordinate system, it is expected that this study could be applicable to a variety of events and utilized in the actual sports games.
Purpose: This study was to verify the relationship between coaching behavior(autonomy/controlling behavior), self-regulation motivation and performance. Method: 356 athletes (from middle to work and professional team) in individual and team sport completed coaching behavior scale developed by this researchers assessing autonomy and controlling coaching behavior perceived by players, Korea Basic Pyshoclogical Needs Scale (KBPNS) assessing basic psychological needs, Behavioral Regulation in Sport Questionnaire (BRSQ) assessing sports motivation level based on self-determination theory, and sport performance score. To estimate the relationship between coaching behavior, self-regulation motivation and performance, this study employed the structure equation modeling analysis. Results: The relationship between psychological needs, regulation motivation and performance showed that autonomy coaching behavior tend to reinforce competence and autonomy of player. These variables have a positive effect on more inner regulation motivation. Moreover, the intrinsic motivation through stimulation experience was a key factor leading to a positive performance by improving the performance strategy and skill of athletes. Conclusion: These results are meaningful as an empirical evidence that relationship between motivation and performance can be changed according to the type of coaching behavior, and that autonomous coaching behavior play an important role in maximizing the performance of player that provided theoretically form.
The purpose of this paper is to map how sport sociologists and sport historians have engaged in the study of race and/in sport. Focusing on scholars with two communities of the North American Society for Sport Sociology & Sport History, it investigates themes, historical/sociological philosophy, theoretical/methodological issues that underpin their works. To be more specific, mainly four types of research are detailed: 1) popular narratives that mostly celebrate black athletes’ success in sport, 2) so-called the early academic works that highlight the positive role of sport in advancing the issue of race in relation to social justice, unification, equality, and so on, 3) a group of researches informed by the positivism, which attempt to discover, investigate, identify racially problematic phenomena, incidents, policies, or incidents and explain why they happen, what makes them problematic, and how to solve such matters, and 4) critical paradigm that orients cultural studies based researches that attempt to explore the relationship between sport and race with focus on interpretive, theoretical, and reflective approaches. In conclusion, it is discussed why I pay attention to the critical paradigm, what it’s emergence means to the sporting academy, and in what ways we can embrace it into the Korean sporting academy.
There has been a growing advocacy for a critical approach to physical education teacher education(PETE) in the era of globalization and ubiquitous society. Drawing on critical pedagogy, the purpose of this paper was to explore the meanings and methods for developing critical professionalism in PETE through identifying the definitions and features of critical professionalism. The notion of critical professionalism includes four crucial components: critical reflection, social sensitivity, critical thinking, and practicability. This paper suggests an inquiry-oriented physical education teacher education to develop per-service teachers’ critical professionalism in terms of providing a range of teaching methods centered on microteaching, discussion-based lessons, critical reading and writing, and using media materials. Building on findings, it was concluded that there is a need of programs for the development of policy literacy understanding complex social and cultural contexts of school physical education. Furthermore, PETE should focus on the processes of critical reflection on the teaching and learning act itself within wider social contexts, by using an inquiry-oriented approach to PETE, which will contribute to fostering teachers’ critical capacities needed to guard the educational aims of physical education against political interference.
The purpose of this study was to examine the relationship of obesity index, fitness and cardiovascular risk index in middle and high school students. Obesity index, fitness score and cardiovascular risk index were measured from 1,044 middle and high school students. The results of relation between obesity index and fitness showed that the higher obesity index had significantly lower fitness score for both boys and girls (boys: p<0.001, girl: p<0.05) The results of relation between obesity index and cardiovascular risk index indicated that the higher obesity index had significantly higher cardiovascular risk index for both boys and girls (boys: p<0.001, girl: p<0.001). Moreover, The lower fitness index showed significantly higher cardiovascular risk index regardless of gender in middle school students (boys: p<0.001, girl: p<0.01). Therefore, the results of this study indicated that obese adolescents had the lower fitness level and high possibility of cardiovascular risk.
The purpose of this study was to analyze the differences among behavioral skills of goalkeeper of K-League and national team and the differences among behavioral skills of goalkeeper according to game the result of match. 5 games of K-League Classic and 10 A matches of the national team in 2013 were analyzed by using Soccer Data Analysis Program and ‘Evermedia HD Capture Station’, which is an HD capture equipment with excellent functions of editing and storage of high-definition video. For statistical analysis process, SPSS Version 21.0 was used to conduct t-test and ANOVA. The results of analysis were as follows: First, the differences among behavioral skills of goalkeeper of K-League and national team were higher in the order of catching factor, kick factor, strategy factor, punching factor. The differences among the specific sub-factors of behavioral skills factors was the highest in crossing catching to be followed by cross punching. And goalkeepers of K-League were higher than those of the national team. In back pass kick factor in kick factor and build-up factor in strategy factor, goalkeepers of the national team were higher than those of K-League. In kick factor, there were significant differences in goal kick (out of play), back pass kick (in play), cross punching, and build-up factors. Second, as for behavioral skills factors of goalkeeper according to the result of match, there were significant differences in catching factor, punching factor, and strategy factor; there were no significant differences in ground kick factor among kick factors; there were significant differences in factors of goal kick, volley kick, and free kick.
The purpose of the study was to define the chronical aspect of the sport event and suggest timeline concepts include the work scope of the sport event organization. For accomplish the research goal, literature review on time frame of sport event and the in-depth interview(n=23) was fulfilled. The results of this study were as follows; 1) the time based concept and the perception of the point of phase transition is different in each functional area, 2) the sport event time-frame could be categorized in ex ante Event stage, Event operation stage and ex post Event stage as general and the Event operation stage was departmentalized in preparation phase, Game delivery phase and closure phase. As a result, this study suggested the transition criterion in each phase. Limitations and future directions for real time sport event organization were discussed.
