Purpose The purpose of this study was to explore the process of participation in the PEAK program of collegiate athletes based on grounded theory. Methods In-depth interviews were conducted with 12 athletes from Y University who were registered in Korea Taekwondo Association. The collected data were analyzed by using the open coding, axis coding, and selective coding of the grounded theory, completed the paradigm model among the extracted concepts, and extracted the core categories through the story outline. Results As the result of data analysis, 'participating in the PEAK program' was found as the central phenomenon, and the causal situation was 'bad attitude in class' and 'helpless daily life'. The contextual conditions were 'recognition of the need for class participation and dual career' and 'motivation to participate in the program', and the intervening conditions were 'factors that hinder participation in the program' and 'factors that help program participation'. The action/interaction strategies were ‘caring climate’ and ‘promoting transfer’, and depending on the consequence, ‘learning attitude change’ and ‘life skill change’ appeared. Conclusion Participants improved their learning attitude through the PEAK program and confirmed the possibility of life skills transfer. It is hoped that this study can lead to implementation of various studies and discussions about life skills and transfer.
Purpose Sperm quality and function are reduced by environmental factors (e.g., obesity), leading to increased infertility worldwide. Therefore, the purpose of this review paper was to investigate the effects of obesity and exercise training on sperm quality and function in animal and human models. Methods In order to determine the effects of obesity and exercise on sperm quality, motility, morphology, testosterone, oxidative stress, inflammation, we reviewed previous literatures with MEDLINE, PubMed, and Scopus databases. Results The most important factor to control the sperm motility is calcium ion, which is performed by the protein of CatSper (Cation Channel of Sperm). Obese men showed the decrease of number, concentration, motility, and volume in sperm, resulting in delayed or failed fertility. However, regular exercise training increased sperm-mediated factors including number, motility, and morphology, and festicular function-mediated factors including sperm concentration and serum testosterone. Conclusions While obesity exacerbates sperm quality and function in men, regular exercise training with moderate intensity increases sperm number and motility and reduces oxidative stress and inflammation, leading to the improvement of men’s fertility.
Purpose The purpose of this study was to investigate the differences in physique and physical fitness according to maturity between primary and middle school baseball players. Methods Participants were 112 elite youth baseball players (49 primary school; 63 middle school). Skeletal age estimated maturity. Physique (height, arm span, thigh volume), body composition (weight, muscle mass and body fat), physical fitness (strength, power, agility, flexibility, coordination, anaerobic power and aerobic power) were measured. An independent sample t-test was used to conduct verify the difference between physique and physical fitness according to maturity. Results The results of analyzing physical and physical fitness according to maturity showed that there was a significant difference (p<.05) between the early maturation group and on-time group in primary school baseball players, body fat percentage, muscle mass percentage, sit-up, anaerobic power and reaction time. There was a significant difference between the early maturation group and the on-time group in the middle school baseball players, weight (p<.05), thigh volume (p<.05), fat mass (p<.05), muscle strength (p<.01), power (p<.05) and coordination (p<.05). Conclusions In conclusion, the maturity of a growing baseball player may be influenced by the performance, so maturity status should be considered when judging the performance of a growing baseball player, especially a middle school baseball player.
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.
Purpose The purpose of this study is conducted to analyze the objectivity of the ski technical championships hosted by Korea Ski Instructor Association (KSIA) and to identify the error sources that affect the score of the competition. Methods To this end, we used the data from the 25th(2009) to 33rd(2017) ski technical championships held by the Korea Ski Instructor Association (KSIA). The data provided by Win Excel 2010 was used to sort out the missing data, such as abandonment, according to the data processing method. The collected data were analyzed by using SPSS 22.0 to calculate the mean and standard deviation of each season, event, and judges, and the Intraclass Correlation Coefficient (ICC). In addition, by using the single facet crossed design(p*j) of the generalizability theory’s G study, the variance component estimates for the participant(p) and the judges (j) are calculated, and the influence (%). Results As a result of the research, it was confirmed that the results of all the seasons and events from the 25th to the 33th events were very consistent, with the objective of .845~.986 higher than the recognition level of .80. In addition, the results show that the relative ratio of the judges to the error of the judging score is very low as a result of the error analysis through the dispersion component estimates. Conclusion In summary, the results of the KSIA evaluation are highly evaluated objectivity and have very low impact on the judges' errors.
Purpose The study was designed to investigate the effects of 12 weeks of circuit training and L-tryptophan supplementation on physical fitness and metabolic syndrome. Methods Forty-one menopausal women were randomly assigned to one of three groups. i.e., combined circuit training and L-tryptophan supplementation group (CT+T: n=14), L-tryptophan supplementation group (T: n=14), and control group (CON: n=13). The subjects in CT+T exercised three sessions per week and took 3g of L-tryptophan per day for 12 weeks. The subjects in T took 3g of L-tryptophan per day for 12 weeks. The subjects in CON were asked to maintain their life pattern for the same period of intervention. Physical fitness and metabolic syndrome-related variables were measured at pre- and post-test. The data were compared by utilizing a repeated two-way ANOVA. Results Main results of the study were as follows: 1) Standing long jump, one leg standing with eyes closed, sit-and-reach, sit-up, and maximal oxygen uptake increased significantly in CT+T. 2) Body weight, body mass index, waist circumference, waist-hip ratio, fat mass, and percent body fat decreased significantly in CT+T. 3) Total cholesterol decreased significantly in CT+T. 4) Fasting plasma glucose (FPG), fasting plasma insulin, and HOMA-IR decreased significantly in CT+T. FPG and HOMA-IR decreased significantly in T. 5) Systolic blood pressure, diastolic blood pressure (DBP), mean arterial pressure (MAP), and rate pressure product decreased significantly in CT+T. DBP and MAP decreased significantly in T. 6) Number of metabolic syndrome risk factors decreased significantly in CT+T and T. Conclusion It was concluded that the circuit training and L-tryptophan supplementation would have positive effects on physical fitness and metabolic syndrome, and that L-Tryptophan supplementation would have positive effects on metabolic syndrome by improving insulin resistance and hypertension in menopausal women.
Purpose The purpose of this study was to conduct the impact of technology acceptance model(TAM) in sports field using a meta-analysis. Methods First of all, findings from 22 articles were used to analyze the relationship between perceived usefulness, perceived ease of use and intention to use via the comprehensive meta analysis(CMA) program. Results Its study results are as follows: First, results showed that TAM have a big effect on intention to use, with an effect size of .537. Second, the most influential effect size of TAM sub-factors was perceived usefulness. Third, in application and SNS had a most effect on TAM. Lastly, results found significant moderating evidence for ratio of female. But ratio of 20’s was not founded significant moderating evidence. Conclusion Based on the results of this study, it will be possible to pursue the behavior of the audience in the field where TAM is applicable in sports field.
PURPOSE The purpose of this study was to analyze the effect size of the unified theory of acceptance and use of technology (UTAUT) in the sports field using a meta-analysis. METHODS After identifying related studies by using RISS, 22 articles were selected and used to analyze the relationship between UTAUT sub-factors (performance expectancy [PE], effort expectancy [EE], social influence [SI], and facilitating conditions [FC]) and intention to use via the comprehensive meta-analysis program. RESULTS The results are as follows: First, the effect size between PE and intention to use was 0.521. Second, the effect size between FC and intention to use was 0.514. Third, the effect size between EE and intention to use was 0.500. Finally, the effect size between SI and intention to use was 0.475. CONCLUSIONS Diverse strategies can be derived to increase consumers' intention to use in the sports field using the UTAUT model.
The purpose of this research is to investigate the factors affecting the performance capability of lunge movements by performing lunge movements which are commonly used as a method of instant physical movement in sports with a kinetic analysis including an EMG analysis. This research targeted 14 skilled fencers and made the subjects perform kick-lunges which allow them to go farthest from their positions and performed an analysis on such, applying a 3D motion analysis system and an EMG system. The subjects performed kick-lunges in two movements; one with a preliminary movement and the other without it and those are performed with both dominant leg and non-dominant leg. The result of this research is as follows. The lunges with a preliminary movement showed higher performance capability than those without it. Furthermore, as the level of skills gets higher, the length of lunges gets longer, and it seemed that a tactical mechanism shortening exercise performance times was used as a mechanism to control the impulse coming from such lengthened lunges. In addition, a difference appeared in mechanical factors such as moment and power in a dominant leg movement and it seemed to result from a difference in an functional capability using muscles.
PURPOSE This systematic review and meta-analysis aimed to assess the effectiveness of exercise programs in improving physical fitness among middle-aged adults in Korea. METHODS A literature search was conducted using KCI-registered databases on DBpia, RISS, and KISS up to September 21, 2023. The review followed the PICOSD framework (population: middle-aged adults; intervention: exercise program; comparison: did not participate in exercise program; outcome: physical fitness; study design: randomized controlled trials). Two researchers independently evaluated bias using the Cochrane Risk of Bias tool for randomized trials (RoB 2). The data was synthesized using the CMA 3.0 program, applying a random effects model to estimate the overall effect size using Hedges’g. RESULTS Out of 914 screened documents, 15 studies were selected, comprising 405 participants. The overall effect size for improving physical fitness was significant (g=0.994, 95% CI: 0.712–1.276). Sub-analysis indicated significant improvements in various components, including muscle strength (g=1.295, 95% CI: 0.909-1.682), muscular endurance (g=0.972, 95% CI: 0.637-1.308), cardiorespiratory endurance (g=1.092, 95% CI: 0.453–1.731), flexibility (g=0.883, 95% CI: 0.555–1.210), muscle power (g=1.421, 95% CI: 0.656– 2.186), and agility (g=1.854, 95% CI: 0.347–3.361) compared to the control group. An additional analysis focusing solely on women revealed a slight increase in effect size, although the order of effect sizes remained consistent across fitness components. CONCLUSIONS This meta-analysis confirms the effectiveness of exercise programs in enhancing physical fitness in middle-aged adults. The systematic review also highlights key considerations for designing exercise programs for this demographic. Future studies should aim to minimize bias and enhance the quality of reporting to ensure more robust results.
