ISSN : 1598-2920
PURPOSE This study aimed to examine the effect of acute tart cherry juice intake on recovery after intermittent exercise in female field hockey athletes. METHODS Sixteen university female field hockey athletes were studied for a total of 3 days. The cohort was divided into 2 groups, placebo group (n=8, PLA) and the tart cherry juice group (n=8, TCJ), Each supplement was consumed 5 times over 48 hours. On the first day of the study, venous blood was collected before the test, and physical fitness variables (20m sprint, 5-0-5 agility, and Countermovement jump) were performed twice before and after the Yo-Yo Intermediate recovery test 1 to determine the degree of muscle damage and recovery of physical fitness factors. After all tests on Day 1, supplements (PLA, TCJ) were taken. After 24 hours, venous blood collection was performed, and after 48 hours, venous blood collection and physical element variables were measured to verify the effectiveness of tart cherry juice. RESULTS In the TCJ group, a significant effect was found over time in the 5-0-5 ability among the fitness variable items (p<.001) In Countermovement jump (CMJ), there was a significant effect over group and time (p<.001). Second, significant effects over group and time were shown in Interlukin-6 (IL-6) among variable items related to muscle damage and inflammation through venous blood collection (p<.05) and LDH (p<.001), and CK (p<.01) showed a tendency to decrease with time. CONCLUSIONS The results of this study suggest that acute tart cherry juice intake after intermittent exercise tends to reduce muscle damage and inflammation-related variables in female field hockey players, which could help them recover quickly, especially after hectic game schedules.
PURPOSE This study investigated the associations between physical fitness and fall efficacy with thigh circumference in elderly women with osteopenia/osteoporosis. METHODS A total of 166 female participants aged 76.3±5.0 years with –1.0≥T-score of femur neck bone mineral density were voluntarily recruited from local community centers. The participants were classified as low 25%, middle 50%, and high 25% groups based on their thigh circumference. Physical fitness measurements, including strength, flexibility, aerobic endurance, and balance were measured with a standardized protocol. The Korean version of the fall efficacy scale (K-FES) was used to assess fall efficacy. Logistic regression analysis was used to estimate odd ratio (OR) of poor physical fitness and low fall efficacy according to thigh circumference levels. RESULTS In terms of physical fitness, the middle 50% group (OR=0.430, 95% CI=0.194-0.953) and high 25% group (OR=0.129, 95% CI=0.049-0.343) had significantly higher linear trend for poor physical fitness compared to the low 25% group (reference), (p<0.001). In fall efficacy, the middle 50% group (OR=0.279, 95% CI=0.119-0.656) and high 25% group (OR=0.100, 95% CI=0.036-0.275) had significantly higher linear trend for low fall efficacy compared to the low 25% group (reference) (p<0.001). CONCLUSIONS The current findings suggest that maintaining high thigh circumference via regular physical activity and diet may contribute to attenuation of decreased risk for poor physical fitness and low fall efficacy in elderly women with osteopenia/osteoporosis.
PURPOSE The purpose of this study was to establish the criteria for measuring acute muscle fatigue using tensiomyography (TMG) by quantifying the trend of changes in TMG variables. METHODS Searches were conducted in the Web of Science and Pubmed databases using the keyword “Tensiomyography”. Sixteen studies which used TMG to measure acute muscle fatigue caused by acute exercises in rectus femoris or biceps femoris were included. All statistical data analyses were performed using Comprehensive Meta-Analysis software program. RESULTS The meta-analysis results indicated that the biceps femoris showed a significant (p<.05) decrease in all TMG variables of the elite athletes. Also, in the overall effects of maximum displacement and mean velocity until 90% Dm (Vc90) showed a significant (p<.05) decreasing trend. The rectus femoris showed a significant (p<.05) decreasing trend for maximum displacement (Dm) in the average person, while contraction time (Tc) showed a decreasing trend in elite athletes and overall. CONCLUSIONS These results suggest that TMG could be used as an indicator of muscle fatigue indicator, and will help to develop a more proper protocol to test the response of the body to muscle fatigue.
PURPOSE The purpose of this study was to verify the support effect of muscle activity and stability according to walking conditions (Level, Ramp, and Stair) before and after wearing a suit with a 12kg heavy weight load. METHODS To accomplish the purpose of the study, subjects (n=10) underwent Electromyography (EMG) measurement under the same conditions for 10 different muscles, and COP width was calculated through foot pressure measurement. The experimental movement was level walking, Ramp walking, and stair walking, each carrying a 12kg load, and measured once before and after wearing a wearable suit. RESULTS Electrolyography (EMG) measurement revealed a significant difference in the average EMG values of muscle activity of R.RF in level walking(p<.05), R.RF and L.RF in ramp walking(p<.01), L.RF and L.BF in stair walking (p<.05). COP width measurement revealed a significant difference in the reduction of COP width in all walks (level walking, ramp walking, stair) (p<.05, p<.01, p<.001). CONCLUSIONS The effects of wearing a wearable suit are as follows. First, the wearable suit has a significant effect of assisting the Rectus Femoris muscle. Second, there is a gait stability effect by wearing a wearable suit.
PURPOSE The purpose of this study is to analyze various citation patterns such as the scope and intensity of the academic influence of Korean "Kinesiology" studies. METHODS To this end, this paper collected and analyzed 17,693 target articles published in 22 KCI-accredited “Kinesiology” related journals from 2001 to 2014, and 98,941 citing cases that took advantage of target articles as references. Specifically, this paper analyzed the citation pattern by dividing it into two parts. First, this paper analyzed the distribution of citations in individual target articles and the top-cited articles and top-cited researchers. Second, this paper also analyzed the citing articles; such as in which journal, what academic field, and in what pattern the “Kinesiology” target articles were cited. RESULTS As a result, 15% of the target articles were not cited at all for five years after publication, while 6.8% of papers were cited more than 17 times, which was exceptionally more cited compared to the majority of target articles. There were no research topics exclusively exerting influence in Korean "Kinesiology" research, but relatively many cited thesis topics include 'self-management, 'leisure statement', 'psychological well-being', 'self-confidence', 'service quality', and 'leisure flow'. Besides, the Korean "Kinesiology" articles accounted for 76% of the total of about 98,000 citations, having greater influence within the same academic field than other academic fields. CONCLUSIONS This study contributes to the relevant literature in that it is one of the early endeavors to study the citation pattern for the entire Korean kinesiology articles.
PURPOSE This study was conducted to estimate the tendency of psychological factors influencing cycling performance by analyzing the characteristic factors of athlete reputation in the news big-data. METHODS To explore the psychological factors influencing cycling performance, an open questionnaire was conducted on 82 cyclists, and Inductive Content Analyses was performed. Overall, 89,520 news articles were collected through BIGKinds, and forming factors of athlete reputation were derived through LDA topic modeling analysis and inductive categorization. Through regression analysis, time series tendency of the factors of athlete reputation was calculated. Finally, the tendency of psychological factors to influence cycling performance was estimated based on the previously derived results in this study. RESULTS The psychological factors influencing cycling performance were found to be; emotion control, trust capital, cognitive control, motivation and communications with the coach. The forming factors of athlete reputation was found to be; reporting of the sports event, infrastructure creation, analysis to performance, moral issue, social environmental changes and sports gossip. The time series tendency of the forming factors of athlete reputation was found to include the categories of Hot, Warm, Cool and Cold. The psychological factors influencing cycling performance are estimated to expand to exercise performance and moral intelligence. CONCLUSIONS The results of this study suggest that the discussion of psychological factors influencing cycling performance extends not only to exercise performance, but also to moral intelligence, reflecting the socio-cultural context in the discussion of performance.
PURPOSE The purpose of this study was to understand the athletic identity of youth football players and to trace its changing trend. METHODS Participants of this study included 93 players in 2005 and 94 players in 2021, who were in middle and high schools. All participants answered open-ended questionnaires. After the results of the inductive content analysis, the changing trend of the results was assessed. RESULTS The athletic identity of youth football players were collected from 811 raw data samples collected in 2005 and 741 collected in 2021 and categorized into 19 sub-categories and 5 categories. The results show a tendency to be specific to football. The athletic identity of a football player itself is weakening, being replaced by the identity of being a student. The role of the camp is also weakening, while more privacy and autonomy are allowed to the players. As a result, efforts to secure the players’ right to study were accepted by the players, and expected to decrease as camp life with limited privacy is on the decline, and as senses toward one’s physical competence are changing. CONCLUSIONS Sociocultural contexts, including changes in the system and social modifications, are reflected in the football player's athletic identity and its changes. The athletic identity of youth football players has changed from its 2005 version of unacademic camp life with limited privacy to the 2021 version, where the player leaves camp to be provided with privacy and attend classes.
PURPOSE This study was conducted to investigate changes in stress before and after elite shooting athletes participate in a match, and to find out the effect on the match score. METHODS Thirty-wight elite shooting athletes were sampled, questionnaires were distributed to measure psychological stress before and after the match, and saliva was collected before and after the match to measure cortisol. In addition, psychological stress and changes in cortisol before and after the game were investigated, and how psychological stress before and after the game and cortisol affect the score of the game were investigated. Accordingly, a statistical analysis based on data analysis was conducted, and the following research results were obtained. RESULTS The pre-match analysis of psychological stress and cortisol revealed statistically significant changes; both post-match stress and cortisol decreased compared to before the match. Increased psychological stress and cortisol both before and after the match had a negative effect on the match score. CONCLUSIONS These findings confirmed that shooters experience very strong psycho-physiological stress before the match, and the stronger the psychological stress, the lower the game score.
PURPOSE The purpose of this study was to apply a life skills program to student-athletes and statistically verify the changes in life skills of the experimental and control group. METHODS Participants were 34 high school Taekwondo athletes (Mage=17.71). They were divided into 18 in the experimental group and 16 in the control group. For eight weeks, the experimental group participated in the life skills program after training and the control group participated in only training as usual. Data were collected by using Life Skills Scale for Student-Athletes (LSSSA), and the participants of two groups filled out the LSSSA before and after the program application. The collected data were analyzed by using repeated measure analysis of variance (ANOVA), and partial η2 (eta squared) was calculated to present the effect size. RESULTS The interaction between time and group was statistically significant in goal setting, coping with stress, positive thinking, and managing emotion among sub-factors of life skills. Partial η2 was interpreted as having a large effect size as it revealed the range of .22 to .51. Therefore, comparing before and after participating in the program, the life skills score of the experimental group among the two groups was significantly improved. CONCLUSIONS Student-athletes who participated in the program experienced positive changes in life skills than those who did not participate in the program.
PURPOSE This study aimed to identify the decision-making process for consumers participating in sports centers based on an extended goal-directed behavior model (EMGB), and to provide empirical data for establishing effective operation strategies for sports centers, including additional risk perception of consumers during pandemic. METHODS A total of 446 surveys were used as the final sample. For data analysis, SPSS 21.0 and AMOS 21.0 were used for frequency analysis, correlation analysis, confirmatory factor analysis, and structural equation model analysis. RESULTS Except for hypothesis 2 and 9, all of the hypothesis were chosen. CONCLUSIONS The findings suggested that extended goal-oriented behavior models can increase consumers' cognitive and emotional factors through emotional aspirations, suggesting that a lower risk perception of COVID19 increases their desire to participate in sports centers, and provides academic fundamental data on how to increase and activate sports centers.
PURPOSE This study aimed to identify the underlying dimensions of brand (professional sport team) authenticity and to develop a valid, reliable scale to measure these dimensions. METHODS A pool of 67 potential items was drawn through a literature review, content analysis, qualitative research (n=43), and an expert evaluation. The identified items were subjected to exploratory factor analysis (n=248) and confirmatory factor analysis (n=285). In addition, multiple regressions were conducted to examine the criterion validity of the scale. RESULTS The results showed that the brand authenticity scale for professional sport teams consists of 42 items representing 8 dimensions: continuity, originality, quality commitment, heritage, symbolism, credibility, stakeholder-related integrity, and consumer-related integrity. The study has proven evidences of internal consistency and convergent, discriminant, and criterion validity of the scale. CONCLUSIONS The findings suggest that the scale developed in this study offers a vital foundation to understand the structure of brand authenticity in the context of sport fans and its impact on sport consumer behavior.
PURPOSE The outdoor camping market size is expected to hit a new high in 2021 as the popularity of outdoor activities surges due to the COVID-19 pandemic. The purpose of this study was to investigate the structural relationships among servicescape, perceived value, flow and behavioral intention, focusing on participants of international outdoor camping exhibition. METHODS Demographic analysis, confirmatory factor analysis, and structural equation modeling analysis were perfomed. RESULTS The findings suggest that (1) all servicescape factors (attractiveness, cleanliness, accessibility and responsiveness) have a positive effect on perceived value, (2) attractiveness, cleanliness and responsiveness are significant predictors of flow, (3) perceived value affects both flow and behavioral intention, and (4) flow also significantly impacts behavioral intention. CONCLUSIONS These findings highlight that high quality servicescape can result in enhancing a positive perceived value and flow, and in turn leading to behavioral intention of consumers. Hence, it is recommended for practitioners and staff of the exhibitions to considering the strategies for improving servicescape factors in order to achieve their goal.
