Purpose The purpose of this study was to investigate the effects of a functional fatigue protocol on lower extremity dynamic and static postural control. Methods A total of 20 physically active collegiate students participated in this study (ten males, ten females; age 22.5±2.7 years; mass 67.0±13.0 kg; height 168.0±8.9 cm). A unilateral stance with eyes closed for 10 seconds was performed to test static postural control using a balance force plate and single-leg drop landing on 30cm box was performed as a dynamic postural control test and captured using VICON motion analysis system. Results The results of this study showed an average heart rate of 176.3 beats/minute, an 18 rating on the perceived exertion scale, significant differences in blood lactate, and a static postural control deficit after fatigue as compared with before fatigue(p<.05). Dynamic postural control after fatigue changed landing strategy in the form of stiff landing. Knee flexion was decreased at initial contact and at peak vertical ground reaction force, also, both decreased valgus and internal rotation of knee joint. Conclusions This protocol may use for enhancing fatigue-endurance training as well as for inducing fatigue. Further, to ascertain a landing strategy, it is recommended to increase landing height to clearly observe changes in landing strategy.
[Purpose] The purpose of this study was to examine the differences in visual search strategies between expert and novice badminton players while performing badminton serve. [Method] To this end, expert (more than 10 years experience) and novice (less than 6 months experience) badminton players performed 15 trials of two types of serve (i.e., short-serve and long-serve), in total 30 trials. All the participants’ eye movement was recorded during each trial, and mean fixation duration, fixation distribution, final fixation duration and location, and gaze entropy were analyzed. [Results] The results showed that there was no difference in mean fixation duration between expert and novice players. The analysis of mean fixation duration on each location showed that participants fixated more on the net while doing short serve whereas fixated more on the space when they did long serve. In particular, expert players fixated more on the space while doing long serve than novice players, and fixated more on the net and racquet for the short serve. However, novice players fixated more on the location of shuttle would be landed. The final fixation duration was not different between expert and novice players. Further, expert players showed higher gaze entropy than novice players. [Conclusion] The findings indicate that expert players fixated more on the net for the short serve, and the space for the long serve, and visual search strategies of experts were more varied than novice players.
[Purpose] The present study attempted to verify the effectiveness of an early childhood physical health improvement program (subsequently in the present study, KICCE Early Childhood Health Improvement Program) developed in Korea by modifying and improving the Mission-X: Train Like an Astronaut program developed by NASA to be suitable for children of ages 4 and 5. [Methods] The subjects in the study were 679 children at 7 facilities in Seongnam city, Osan city, and Yongin city, of which 4 were daycares and 3 were kindergartens. The participant group consisted of 339 children, and the control group consisted of 340 children. The program consisted of total 24 activities 3 times a week over 8 weeks, of which 8 activities were related to nutrition and 16 activities were related to physical activity, and in the 9th and 10th weeks, the 16 physical activities were reconfigured and performed 3 times a week. Physical parameters and related fitness parameters were measured before and after the program, and an ANCOVA analysis was performed in which descriptive statistics and scores before the program were the covariate variables. [Results] The results show that first, growth statuses of participant children were in the upper middle section of the distribution, and second, of the 6 fitness developments, flexibility, balance, and quickness were improved, and in most areas, boys and below-normal-BMI group showed beneficial effects. [Conclusion] Thus, KICCE Early Childhood Health Improvement Program is conclusively proven to be effective for early-childhood physical development.
[Purpose] The purpose of this study was to examine the effect of recovery methods comparing with change ratio in Lactic acid(LA), Heart rate(HR), VAS(Visual analogue scale) on recovery patterns after field training(FT) in Korea National bobsleigh and skeleton players. [Methods] The tests were conducted for 3 times at a one-week interval as an experimental design within the same subjects(n=9), observed change ratio in LA, HR, VAS through applying Active recovery(AR), Whole body vibration(WBV) & Cold water immersion(CWI) after FT. [Results] The results were summarized as follows: The alteration of ratio in LA, HR, VAS decreased significantly after applying the three recovery patterns(p<.01). The difference between the groups showed that the reduction in lactic acid according to active recovery and whole-body vibration was higher than cold water immersion(p<.01). [Conclusion] In conclusion, although active recovery was more effective than static recovery, there was a significant effect of the three recovery methods in this study on reducing a fatigue in bobsleigh & skeleton players. Therefore, it would be considered to improve the performance of athletes when these methods apply for them depending on situations and environments.
Purpose The study aims to analyze the factors affecting the Residents user satisfaction in order to improve the management of the Open School Sports Center the support facility of the National Sports Promotion Fund. Methods This data is based on Korea Institute of Sports Science(KISS)'s Open School Sports Center Usage Status and Satisfaction Survey (2016) and Open School Sports Center use performance. The analysis model is a regression model (TOBIT) that takes into account the limited characteristics of dependent variables. Results The results are as follows: the satisfaction is negatively related age, number of regulations, weekday opening hours, and usage fees. Conclusion Therefore, in order to increase the satisfaction of Open School Sports Center residents users, various supports are needed. This includes funds for PR, discounts and user-friendliness. It also requires differentiated management of each Center. In the case of regions and facilities, consumer-oriented policies need to be applied instead of collective standards.
Purpose This study was to investigate the systematic application of the life skills program and its effects in a sport setting. Methods Participants were 14 college students(8 males and 6 females) majoring in Taekwondo. Survey tools were utilized to measure items of life skills and journals. Data analyses were conducted by using Excel program and inductive content analysis. Results First, life skills in this study consisted of goal setting, self-talk, imagery, cognitive restructuring. Life skills program has undergone a procedure, such as the introduction, training, development, application, and evaluation. Second, the average scores of life skill variables have been changed according to measured points. Specifically, the average scores of goal setting and self-talk were highly increased over time and the average score of imagery indicated gradual rising line. The average score of negative thought was slightly reduced over time. Third, regarding effects of this program, participants’ responses were categorized into six components; performance enhancement, positive thoughts, chances of change, goal setting, struggling efforts, and motivation formation. Further, participants stated this program was a great opportunity to develop these components. Conclusion The application of life skills program in sport settings will contribute to participants’ life span developmental change in cognitions, emotions, and behavior.
Purpose The purpose of this study was to investigate the effects of coupled high frequency rTMS and prism illusion in elderly stroke patients, based on the result of previous studies which discovered the effect of bilateral training, mirror rehabilitation treatment, and rTMS. Methods This is a case study of 4 stroke patients who were homogeneous on the basis of selection criteria such as brain injury area, duration of onset, degree of upper limb movement function. A total of 24 rehabilitation sessions were conducted three times a week during the training period, and TMS(transcranial magnetic stimulator), EMG, motion analysis system, and prism optical glasses were used for apparatus. Results The results of the study were as follows: Combined rehabilitation exercises were found to be beneficial to restore upper limb function in stroke patients. Particularly, the maximum speed of stretching and JTT(Jebsen-taylor Test) performance showed improvement after training. The amount of total map volume and MEP(megnetic evoked potential) increased in evaluation of neurophysiology. Conclusion The upper limb dysfunction of stroke patients could be restored by combine rehabilitation exercises.
This study was designed to develop a communication training program for college ice hockey teams and examine the effects of this program. College ice hockey players and coaches participated in this study. The various types of data were collected and analyzed to assess the needs of the program and to develop the program with expert meetings. To analyze the effects of the developed program, questionnaires, experience reports, and in-depth interviews were conducted as measures. The results of this study are as follows. First, ice hockey team communication consisted of eight factors (i.e., sympathy, respect, trust, two-way verbal communication, firm expression of opinion, training program communication, developing rapport, and cohesion). Thus, the program developed based on eight factors and consisted of three stages of total 12 sessions which was 90 min to 100 min long. Second, this program increased communication satisfaction, coach-athlete interaction, group cohesion and exercise effectiveness, and these quantitative results were statistically significant. Moreover, qualitative analysis revealed that this program enhanced sympathy, social cohesion, and task cohesion among participants as well as positively changed their communication skills better than before. The communication training program which was developed through this study could provide basic information of a communication training program in the sports domain and positively influence overall sports team effectiveness and performance.
The purpose of this study is to establish the efficient defensive strategy from analyzing the goalkeeper’s gaze behavior and defensive motion in both field hokey penalty corner and penalty stroke. To achieve this goal, 3 national team goalkeepers’ gaze behavior and defensive motions were analyzed, as well as the player’s visual strategies from their interview contents. For the apparatus, multi-channel integrational system were used for analyzing goalkeeper’s reaction movement and personal visual strategies. The result is as follow: First of all, In the penalty stroke, goalkeepers were tended to focus on the bottom of the shooter’s hokey stick. Second, national hokey players had quicker anticipating saccadic movement. For this reason, their visual fixation locations were arrived in targets earlier than the hockey ball. Lastly, in the interview contents, they were reported to focus just on the ball from not disturbed by other various objects(body, hockey stick). However, they actually observed various body parts of shooters. These results imply that we need to develop an effective perceptual skill training in order to anticipate the shooting performance more accurately and rapidly. These types of perceptual and cognitive skill training should be conducted with information on knowing their specific visual cues in anticipating shooting direction.
This study aimed to explore the types of traumatic event experienced by Volleyball players and then prepare to take-off the serial process of posttraumatic growth to schematize a causal network by organizing the factors for overcoming adversity. Participants experiences were collected by distributing open-ended questionnaires to 77 professional Women's volleyball players in 2013-2014 and collected data was categorized by inductive content analysis. These results were schematized by the causal network. As a result of the study, according to the trauma were categorized into four general areas: member conflict, competence loss, physical injury, and coach conflict and the emotions relative to the trauma were categorized into four general areas: powerlessness, pressure, dejection, and hostility also coping factors were categorized into three general areas: social support, intervention strategies, and psychological control. Finally, positive growth emerged as psychological leap, performance improvement, psychological maturity, and emotional stability. And as a result of the categorized study, bring about a better understanding to the posttraumatic growth by causal network. Based on the study results, that volleyball players experienced a positive development on themself after overcoming the problem that they had suffered psychological scars from a traumatic event. In doing so, they contributed to the formation of resources that helped them in their positive lives. In this regard, this study expects to provide the players who have been scratched in mind because of the traumatic experience.
