Earticle

Background : The purpose of this study was to examine the effect of balance ex ercise and plyometric exercise on fuctional ankle instability. Methods : Followed by an ankle instability questionnaire, 25 adults in their 20's were surveyed regarding ankle sprain experience of which, 18 subjects were rando mly assigned into balance exercise group(BEG,n=9) and complex exercise group(C EG,n=9). The degree of ankle instability of each group was determined by the CAI T, The digital inclinometer was also used to measure the ROM of ankle plantar fl exion and dorsiflexion. Static balance ability, dynamic balance ability were measure d using-Biorescue-equipment to evaluate balance ability. Participant's balance left to right and front to back were measured by static plantar pressure and the follo wing results were obtained. Results : To justify its significance, the standard of ankle instability of each contr ol groups were set at less than CAIT 24 points and results showed both groups h ad a statistically significant difference(p<.05). It was also evident the ROM showe d a significant difference in the dorsiflexion of the BEG(p<.05). Furthermore, by c omparing the difference between static balance and dynamic balance, results showe d there was a significant different between Romberg velocity and limit of stability area in CEG and Romberg velocity in BEG(p<.05). Lastly, there was significant di fference in BEG's area between front to back(p<.05). Conclusion : By the mentioned results, it was concluded there were some signific ant effects on the ankle instability, ROM, balance ability and partial plantar pressu re between the balance exercise group and plyometric exercise group.

이 연구는 대한태권도협회에 등록된 청소년 태권도 시범 선수 28명을 대상으로 불안정 지면 기반 코어 운동과 플라이 오메트릭 훈련의 복합 적용이 동적 평형성과 코어 안정성, 그리고 하지 근력과 순발력에 미치는 영향을 검증하기 위해 수행하 였다. 이 연구는 불안정 지면 코어와 플라이오메트릭 훈련 집단과 대조군인 안정 지면 코어와 플라이오메트릭 훈련 집단으로 나누어 중재를 수행하였으며, 중재 전과 중재 8주 후 Y-밸런스 검사와 스포츠 특이적 지구력 플랭크 검사, 그리고 슬관절 신전, 굴곡근의 최대 우력과 수직 반동 점프 높이 측정을 실시하였다. 결론적으로, 불안정 지면 기반 코어 운동과 플라이오메트 릭 훈련의 복합 적용은 청소년 태권도 시범 선수들의 동적 평형성과 코어 안정성, 그리고 슬관절 굴곡 근력과 순발력을 향상시 키는 데 효과적이었다. 따라서, 불안정 지면 기반 코어 운동과 플라이오메트릭 훈련을 복합 적용하는 것은 청소년 태권도 시범 선수들의 경기력 향상과 부상 예방을 위한 훈련 프로그램에 효과적인 개입으로 권장될 수 있다.

This study was conducted to examine the effects of a combined application of unstable surface based core exercise and plyometric training on dynamic balance, core stability, and lower extremity strength and power in 28 adolescent Taekwondo demonstration athletes registered with the Korea Taekwondo Association. Participants were divided into two groups: an unstable surface based core exercise combined with plyometric training group and a control group performing stable surface based core exercise combined with plyometric training. The intervention was carried out for 8 weeks. Outcome measures were assessed before and after the intervention and included the Y-balance test for dynamic balance, a sport-specific endurance plank test for core stability, peak torque of knee extensors and flexors, and vertical countermovement jump height to evaluate lower extremity strength and power. The results demonstrated that the combined application of unstable surface based core exercise and plyometric training was effective in improving dynamic balance, core stability, knee flexor strength, and lower extremity power in adolescent Taekwondo demonstration athletes. In conclusion, the combined use of unstable surface based core exercise and plyometric training may be recommended as an effective training intervention for enhancing performance and preventing injuries in adolescent Taekwondo demonstration athletes.

Background: Lunge movements are frequently performed in badminton games and can be a major cause of ankle injuries. Young people are particularly vulnerable to such injuries, which can significantly affect their performance. This study aimed to compare the effects of two interventions on ankle range of motion (ROM), functional level, and athlete confidence, with the aim of contributing to prevention of injury. Methods: Twenty elite young badminton players were randomly assigned to either an experimental group (n=10), which performed ankle joint mobilization and a plyometric exercise program, or a control group (n=10), which performed only the plyometric exercise program. The intervention was conducted twice per week for six weeks. Ankle ROM, functional level (Y-balance test, figure 8 hop test and side hop test), and self-confidence in the ankle were evaluated before and after the intervention. Results: After the intervention, bilateral dorsiflexion ROM significantly increased in both groups (p<.05). The experimental group had significant increases in bilateral inversion ROM and left eversion ROM (p<.05), whereas the control group had a significant increase in right eversion ROM (p<.05). Both groups had significant improvements in results of the Y-balance test and the side hop test for both ankles after the intervention (p<.05). However, there was no interaction between the group and time for any of the measurements. Conclusion: The application of a plyometric exercise program in elite young badminton players may provide valuable data for preventing ankle injuries by increasing ankle joint ROM and improving ankle function.

Background: This study was performed to identify what effect plyometric exercise with application of kinesio taping gives on muscle activity and power of lower limb. Methods: In order to conduct research, total 14 male students at G university located Gwangyang city were randomly assigned; 7 for experimental group (with kinesio taping application) and 7 for control groups(without kinesio taping application) were conducted with box drill, one of the plyometric exercise 5 times a week for 4 weeks. Muscle activities were measured by using electrodiagnosis equipment on quadriceps and gastrocnemius. Collected data was analyzed by using Windows SPSS version 19.0. Results: Muscle activities show statistically significant differences (p<.05) both before and after exercise in experimental and control groups in terms of vastus medialis, rectus femoris, vastus lateralis and lateral gastrocnemius. However, only medial gastrocnemius shows statistically significant differences in experimental group compared before and after exercise. Sargent jump for measuring power shows that only experimental group presents statistically significant differences (p<.05). Two groups show that vastus medialis, vastus lateralis, lateral gastrocnemius and medial gastrocnemius only in muscle activities show statistically significant differences (p<.05) after exercise. Conclusion: The result of this survey indicates that plyometric exercise is effective to improve muscle activity and power of lower limb, especially, the group who exercises with application of kinesio tape is more effective than the other group with no tape application. Therefore, it is considered that plyometric exercise with tape is more effective to improve power and muscle strength.

Background: Plyometric exercise is an exercise exerting forceful power in a brief period using isotonic activation. It is effective to improve reaction of muscle, agility, endurance and athletics performance. Weight training is an exericse improving muscular strength, endurance and respirating ability applying diversely in frequency and load of exercise Plyometric exercise and Weight training is to facilitate the athletics performance though improving the function of lower limb muscle, there is a difference that Plyometic jump squats is the way to improve agility and Weight training is the way to improve muscular strength. Therefore, it is necessary to know how this difference effects on athletics performance as measuring ankle, ROM, and jumping ability. Design: Randomized controlled trial. Method: This study was conducted with the voluntary participation of 40 university students, who were randomly assigned to jump squat and calf raise groups (n=20 per group). For each subject, we measured the range of motion of the ankle joint before and after exercise, as well as a standing broad jump and vertical jump test performance. We compared the performance indices before and after exercises using paired t-tests, and between groups using independent-samples t-tests. Conclusions: Both jump squat and calf raise exercises improved ankle joint dorsiflexion and plantar flexion, as well as standing broad jump and vertical jump height performance. However, there were no significant differences before versus after exercise, or between exercise types. Although jump squats and calf raises have different purposes, it is thought that, in combination, these exercises improve performance more effectively than either alone, and that such a combined exercise program improves the quality of training in both the general public and athletes in various sports.