• 대한물리의학회지
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• 제9권2호
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• pp.223-231
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• 2014

PURPOSE: The aim of this study was to investigate the effect of closed and open kinetic exercises on knee extensor strength and balance in patients with early stroke. METHODS: Thirty patients with early stroke participated in the study. Participants were randomly assigned to three groups: an open kinetic chain (OKC) exercise group (n=10), a closed kinetic chain (CKC) exercise group (n=10), and a control group (n=10). All participants received conventional physical therapy for 30 minutes. In addition, the two experimental groups (OKC and CKC) participated in a 30-minute knee strengthening training program. Training for the experimental groups was carried out three times a week for four weeks. Outcomes such as knee extensor strength and balance ability (Tetrax, Functional Reaching Test, Timed Up and Go Test) were measured before and after training. RESULTS: There were significant differences in knee extensor strength and balance ability between the pre- and post-treatment of all groups (p<.05). The improvement of knee extensor strength was significantly higher in the OKC group than in the other groups (p<.05), and the improvement of dynamic balance was significantly higher in the CKC group than in the other groups (p<.05). CONCLUSION: These results showed that both open and closed kinetic chain exercises are effective in the improvement of knee extensor strength and balance ability. This study suggests that open and closed kinetic exercise training is an effective training for strength and balance in patients with early stroke.

• PNF and Movement
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• 제17권2호
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• pp.283-291
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• 2019

Purpose: The purpose of this study was to investigate the effects of trunk stability training on static balance and game records among archers. Methods: The subjects comprised 24 voluntary archers in middle and high school (aged 14-19 years). All the subjects received trunk stability training for an hour per day 3 days a week for 4 weeks. The Tetrax balance system was used to measure the stability index of the subjects' static balance. The subjects' game records were scored using a single FITA round system. All the subjects were measured before the intervention, 2 weeks into the intervention, and 4 weeks after the intervention, with a follow-up measurement 2 weeks later. Results: The results of this study showed that the stability index was significantly different across all the measuring positions after the intervention (p<0.05). Furthermore, the results of the measurements of the standing position with eyes open and closed were significantly different before the intervention compared to 4 weeks after the intervention (p<0.05). The archery position with the head turned to the left and eyes closed was also significantly different pre-intervention compared to 2 weeks after the start of the intervention (p<0.05). Additionally, the archery records were significantly different after the intervention (p<0.05), as well as before the intervention and 4 weeks after the intervention (p<0.05). Conclusion: Trunk stability training can improve static balance in archers. It may also be helpful in improving athletic performance and maintaining the life of the athlete. Accordingly, trunk stability training may prevent and resolve injuries through careful management when playing one-side sports.

• PNF and Movement
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• 제12권4호
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• pp.209-215
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• 2014

Purpose: This study aims to understand the effect of balance training on ankle muscle activity and static balance in stroke patients. Methods: The subjects were composed of 12 patients who were admitted with chronic stroke in H, K, and R hospitals located in Gangwon-do from August to October 2014. This study conducted balance training on the subjects for 20 min a session, twice a day, five times a week for six weeks. This study measured the surface electromyogram (EMG) of the paretic side's tibialis anterior and medial gastrocnemius for muscle activity. Static balance was measured as a TETRAX stability index. The measurements were conducted before the experiment and six weeks after. The result was statistically analyzed using paired t-test at the significance level of 0.05. Result: Muscle activity of the paretic side's tibialis anterior and medial gastrocnemius did not show a significant difference in the comparison between pre- and post-balancing training. However, the stability index showed a significant difference (p<0.05) between standing with eyes open (NO) and standing on a sponge with eyes open (PO). Conclusion: Although balance training did not affect the muscle activity of chronic stroke patients, it had an effective influence on the stability index. That is, balance training was effective at the functional level, but it did not change the structure level in terms of the ICF evaluation standard. Balance training becomes more effective when it is applied in relation to task.

• 대한물리의학회지
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• 제16권4호
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• pp.23-31
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• 2021

PURPOSE: This study compared the effect of training ankle joint and hip joint thera-band exercise on balance. METHODS: The participants were divided into two groups of 11 each. Group A performed hip exercise after ankle exercise, and Group B performed ankle exercise after hip exercise. Using a green thera-band, the dorsiflexion and plantarflexion and hip flexion and hip extension were exercised repeatedly for 15 seconds three times with a five-second rest between each set. After the exercise and measurement of one area were complete, the exercise and measurement of the other area were performed at one-day intervals. The balance ability was assessed using a Tetrax and Y-balance test and repeated three times; the best values were taken. RESULTS: In the stability index (ST) of the static balance, the hip joint exercise group (HTG) during the follow-up of normal eye open (NO) revealed notable improvement over the ankle joint exercise group (ATG), and in the follow-up of the normal eye closed (NC), the ATG showed significant improvement over the HTG. In the pillow with eye closed (PC) follow-up, the ATG showed significant improvements over the HTG. At the left (Lt) and Y-balance test (YBT), the ATG showed significant improvements in the follow-up over the HTG (p <.05). CONCLUSION: In static balance, the ATG showed significant improvement in the follow-up of NC and PC over the HTG. In the dynamic balance, the Lt. dynamic balance on the non-dominant side in the ATG showed significant improvement in the follow-up over the HTG.

• 한국엔터테인먼트산업학회논문지
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• 제14권7호
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• pp.469-476
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• 2020

본 연구는 등받이 유무에 따른 하지 운동프로그램이 허리통증이 있는 대학생에게 미치는 영향을 알아 보기 위해 균형능력, KODI, VAS 검사를 이용하였다. 광주광역시 소재 K대학교 학생 32명을 대상으로 4주간 탄력밴드를 이용한 하지 운동프로그램을 진행하였으며 등받이의 유무에 따른 집단 별 16명씩 무작위로 선정하여 진행하였다. 균형능력과 KODI 점수에서는 집단과 시간에 의한 상호작용이 없는 것으로 나타난 반면 VAS 점수에서는 집단과 시간에 의한 상호작용이 나타났다. 또한 두 집단 모두 중재 후에 균형능력, KODI, VAS 점수에서 유의하게 증가하였다. 따라서 등받이 유무와 상관없이 의자에 앉아서 시행하는 하지운동 프로그램이 오랜시간 앉아서 생활하며 허리통증이 있는 학생과 직장인에게 일상에서 쉽게 할 수 있는 운동 프로그램으로 적용하는 것이 필요할 것으로 생각된다.

• 대한통합의학회지
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• 제10권3호
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• pp.63-72
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• 2022

Purpose : Several studies have investigated the effects of dynamic stretching (DS) and self-mobilization (SM), however, studies comparing the two interventions are rare. Therefore, the purpose of this study was to compare the effects of DS and SM on ankle strength, dorsiflexion range of motion (DFROM), and balance to determine which is superior. Methods : Thirty-two healthy young adults participated in this study. Participants were randomly assigned to two groups (SM and DS). DS was performed for the purpose of stretching the medial gastrocnemius muscle. For the SM group, ankle joint SM was performed in three ways. For all participants, the following measurements were performed as pre- and post-tests: isometric strength of dorsiflexor and plantar flexor, weight-bearing lunge test (WBLT) to evaluate DFROM, Tetrax system to evaluate static balance, and y balance test (YBT) to evaluate dynamic balance. Differences before and after the intervention within each group were compared using paired t-test. Also, the variable's variation was compared between groups using an independent t-test. Results : Significant differences were found in ankle dorsiflexor strength, WBLT, YBT, weight distribution index (WDI) (pillow and opened eyes; PO), and stability index (ST) (normal and closed eyes; NC) before and after intervention in the SM group (p<.05). In the DS group, significant differences were found in ankle dorsiflexor and plantar flexor strength, WBLT, YBT anterior, WDI (normal and opened eyes; NO, PO), and ST (NO, NC, PO, pillow and closed eyes) before and after the intervention (p<.05). Ankle plantar flexor strength and WDI (PO) were significantly different between groups. Conclusion : Based on the results of this study, DS or SM can be considered as a possibility for selective use according to variables for improving ankle joint function (DFROM, muscle strength, balance).

• The Journal of Korean Physical Therapy
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• 제35권4호
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• pp.105-110
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• 2023

Purpose: The purpose of this study was to determine whether the degree of dizziness affects static balance due to the disruption or absence of the senses involved in balance. To this end, the correlation between the Dizziness Handicap Inventory (DHI), which objectively evaluates dizziness, the Fourier Index (FI; Frequency bands of postural oscillation, F1, F2-4, F5-6, F7-8) and the Stability Index (ST), which evaluates static balance ability, were examined. Methods: This study investigated balance and dizziness issues in 30 healthy young adults. Participants underwent multiple tests like the DHI and tetra-ataxiometric posturography (Tetrax) under different conditions (eyes open/closed, standing on a foam-rubber pillow, and with the head in various orientations). Results: We found that F1 exhibited a weak positive correlation with dizziness under normal conditions, as well as when the eyes were closed (r=0.396, p<0.05) and the head was tilted back (r=0.375, p<0.05). Meanwhile, F5-6 showed a moderate positive correlation with dizziness in both head-back (HB: r=0.471, p<0.05) and head-forward postures (r=0.404, p<0.05). Lastly, both F7-8 and ST demonstrated a moderate positive correlation with dizziness when the head was in a forward posture (F7-8: r=0.483; ST: r=0.403, p<0.05). Conclusion: The study results indicate that the severity of dizziness affects sensory systems and balance. It also suggests that head movements, especially forward and backward, further stimulate the vestibular system, intensifying dizziness, and balance problems in affected individuals.

• 한국안광학회지
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• 제21권3호
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• pp.259-264
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• 2016

목적: 유발된 난시성 흐림이 정적균형을 유지시키는 다른 감각기관들에 미치는 영향을 분석하여 신체 안정성을 감소시키는 원인을 규명하고자 하였다. 방법: 평균 나이 $23.40{\pm}2.70$세의 20명을 대상으로 하였다. 근시성 단성난시를 유발하기 위해 (+)원주렌즈의 축을 양안에 $180^{\circ}$(직난시), $90^{\circ}$(도난시), 그리고 $45^{\circ}$(사난시) 방향으로 위치시켰으며, 각각의 방향에 +0.50 D, +1.00 D, +1.50 D, +2.00 D, +3.00 D, +4.00 D, 그리고 +5.00 D의 원주렌즈를 이용해 각 난시유형별로 난시성 흐림을 증가시켰다. TETRAX biofeedback system을 이용하여 각 조건에 따른 안정성 지수(ST)와 각 감각기관에 해당하는 4가지 주파수의 흔들림 강도(SP)를 측정하였다. 결과: 난시성 흐림이 커질수록 유발된 모든 난시유형에서 ST는 완전교정상태와 비교해 증가하였지만, 유발된 사난시에서만 유의한 차이를 보였다. 난시성 흐림이 증가함에 따른 ST의 증가와 각 주파수별 SP간의 상관분석결과, 유발된 사난시에서 신체 안정성을 저하시키는 원인으로 체성계(중 고주파수), 중추신경계(고주파수), 말초전정계(중 저주파수), 그리고 시각계(저주파수)의 영향 순으로 높은 상관성을 보였다. 결론: 미교정된 사난시로 인한 시각정보는 신체균형을 유지시키는 모든 감각기관의 정상적인 기능을 방해하여 신체 안정성을 감소시킬 수 있다. 따라서 최적의 난시교정은 신체균형의 불안정성을 제거시키는 중요한 요인이 될 수 있다.