• Physical Therapy Rehabilitation Science
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• 제5권3호
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• pp.138-142
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• 2016

Objective: The purpose of this study was to investigate how light touch with a finger affects balance ability when a posture is maintained in the condition of visual information blockage and to provide a fundamental material for developing balance ability in the process of rehabilitation treatment. Design: Cross-sectional study. Methods: The study subjects were 17 healthy men and women in their twenties and thirties who were studying at S University in Seoul. The system was comprised of an equilateral triangular force platform. Subjects were asked to step on the foot position of the force platform (Good Balance, Finland) barefooted for 30 seconds, with eyes closed, hands hanging down loosely, and feet comfortably apart. It was connected to a laptop by using Bluetooth technology. An experiment was conducted in the following three circumstances: 1) no-touch trial, 2) light touch to the back (T7 area), and 3) light touch to the middle finger of the left hand. Each subject was given a 10-minute break between consecutive measurements. The experimental circumstances were performed randomly. Anteroposterior sway (APSV), mediolateral sway velocity (MLSV), and velocity moment (VM) were measured. Results: The APSVs (mm/s) were $9.32{\pm}3.37$ and $5.45{\pm}2.98$; the MLSVs (mm/s), $6.39{\pm}3.35$ and $3.31{\pm}2.48$; and VM ($mm^2/s$), $17.13{\pm}11.75$ and $6.76{\pm}8.31$ in the first and second experimental circumstances, respectively. APSV, MLSV, and VM values were significantly improved with the 1) no-touch trial and 2) light touch to the back trail conditions compared with the 3) light touch to the middle finger of the left hand condition (p<0.05). Conclusions: This study revealed that the balance ability for maintaining a body posture was influenced more by light touch to the back (T7) than by light touch with the sensitive fingertip and body sway diminished after visual information was blocked.

• 한국엔터테인먼트산업학회논문지
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• 제14권3호
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• pp.403-410
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• 2020

본 연구는 만성 뇌졸중 환자를 대상으로 2주간 후각 자극이 균형, 경직 및 삶의 질에 미치는 효과를 규명하기 위하여 실시되었다. 단일맹검 및 사전 무작위 임상시험으로 진행되었으며, 21명의 만성 뇌줄중 환자는 무작위로 후각자극군(n=10)과 속임 후각자극군(n=11)으로 배정되었다. 후각자극 군은 라벤더 오일을 2주간 주 5회, 총 10회 시행하였고, 속임 후각자극 군은 물을 적용하였다. 경직은 Composite Spasticity Score (CSS)를 사용하여 측정하였고, 정적 균형은 힘판(force plate), 동적균형은 Timed up and go test(TUG), 삶의 질은 Short-Form 36 items(SF-36)를 사용하였다. 훈련 후 후각자극 군이 속임 후각자극 군에 비해 정적균형이 유의하게 개선되었으며(p<.05), 경직과 동적균형은 집단 간 유의한 차이가 없었다. 또한, 후각자극 군에서 SF 36의 정신적 건강요약과 총점이 속임 후각자극 군에 비해 유의하게 개선되었다. 본 연구는 후각자극이 만성 뇌졸중 환자의 정적균형과 삶의 질을 효과적으로 향상시킴을 증명하였다.

• PNF and Movement
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• 제17권2호
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• pp.215-222
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• 2019

Purpose: The objective of this study was to investigate whether augmented low-dye taping treatment, which consists of low-dye, reverse-six, and calcaneal-sling taping, is effective in alleviating the collapse of the medial longitudinal arch, which is used for physical balancing during one leg standing. Methods: The subjects comprised 27 students in their 20s whose navicular bone height was lowered by 10 mm or more when evaluated using the navicular drop test. Those with interference factors like deformities, fractures, or traumas were excluded. Frequency-division multiplexing was used to measure one leg standing, and the method to avoir the average each time after 3 times of measurement was applied. Results: Significant differences in the center of pressure (COP) path length, COP average velocity, and forefoot force were observed during left leg standing (p<0.05), but for right leg standing, only changes in forefoot force were noted. Conclusion: Based on the changes to the non-dominant leg in terms of COP path length, COP average velocity, and forefoot force, the immediate effect of augmented low-dye taping, which combines three types of anti-pronation taping, on one leg standing balance in people with flat feet was confirmed.

• Physical Therapy Rehabilitation Science
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• 제10권2호
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• pp.161-166
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• 2021

Objective: The purpose of this study was to quantitatively evaluate the Wii Balance Board (WBB)-based jump performance for the elderly and to confirm the difference in jump performance according to age. Design: Cross-sectional study. Methods: 40 young adults (aged 22.5±2.2 years) and 33 elderly (aged 75.1±5.2 years) without orthopedics disease participated in this study. Standing on the WBB then, with the signal "start," jump vertically to the maximum height at which you can jump, land on the force plate after jump and keep it standing on both feet. All subjects were required to practice the jump sufficiently before starting the measurement, each measuring three times, and the mean values were used. A one-minute break was provided between each trial. Evaluators waited within 1meter for every test to prepare for fall. Results: The vertical ground reaction force of elderly and young adults when jumping using WBB showed a significant difference (p<0.05) and demonstrated discriminant validity. Between two groups, there were significant differences in overall jump time (p<0.05), maximum value (p<0.05), minimum value (p<0.05), center of pressure (COP) pathlength (p<0.05), and flight time p<0.05). Conclusions: This study found that performing the vertical jump, the elderly showed longer jump time, lower vertical ground reaction force, COP pathlength and shorter flight phase than healthy young adults using WBB and demonstrated that as a measurement tool, WBB discriminated vertical jump performance between elderly and young adults.

• 한국운동역학회지
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• 제15권2호
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• pp.1-10
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• 2005

G. B. LEE, A. S. GWON, The Research for Using methodof GRF (Ground Reaction Force) on Rotational Movement in Arabesque. Korean Journal of Sport Biomechanics, Vol. 15, No. 2, pp.1-10, 2005. As, in relation to all movements of a human being, the movements such as mutually walking, running, rotating, and jumping are attained endlessly through the ground amid the interaction with the ground, in terms of the harmonious movement of the upper limbs and the lower limbs, related to the basic movement in ballet, the type of a movement depends on the size and direction of the force that presses down the ground (Fz, Fx, Fy) amid the interaction with the ground. Therefore, aiming to correctly and efficiently perform a rotational movement in Arabesque, this study analyzed factors of the force manifestation through GRF (Ground Reaction Force), by dividing into preparing, stepping, standing, rotating, and finishing stages (events (1) ${\sim}$ (5)), targeting the subjects of 4 elite female students who majored in ballet. 1. At the No.5 position of the preparing stage, It is necessary that support the ground with left and right foot balance, 2. As the stepping stage is the phase ranging from the event (2), in which a plie movement of bending a knee is started, to the event (3) of stretching a knee, Rebunding motion is not good, and One have a position with ankle and knee flextion condition in order to stretch strengthly in event (3) position 3. At the event (1) position, It is necessary that exert the Fz reaction force at the event (3) position. Because large stretch force help to have a toe on position easily and show a active motion 4. In order to have a stand and rotation motion smoothly, One need a muscle strength training for ankle extension, knee extension, control horizental force

• 한국응용과학기술학회지
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• 제36권4호
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• pp.1060-1068
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• 2019

대한민국 영공을 수호하게 될 공군사관학교 생도들의 체력은 주어진 임무를 완수하기 위하여 무엇보다 중요하다. 따라서 본 연구는 공군사관학교 여생도의 학년별 신체조성과 체력의 특성을 확인하고, 전체 여생도의 체지방률 수준에 따른 체력과의 관계를 검증하는데 그 목적이 있었다. 연구의 목적을 달성하기 위하여 공군사관학교 전체 여생도 50명(1학년 13명, 2학년 18명, 3학년 9명, 4학년 10명)을 대상으로 신체조성(골격근량, 체지방량, 체질량지수, 체지방률, 복부지방률, 기초대사량)과 체력(근력, 근지구력, 순발력, 민첩성, 유연성, 평형성)을 측정하였다. 자료처리는 학년별 신체조성과 체력의 특성을 파악하고 체지방률 수준에 따른 체력의 차이를 알아보기 위하여 일원변량분석을 하였다. 연구결과 여생도의 학년별 신체조성 중 체지방량, 체지방률에서 1학년이 4학년에 비해 낮았고, 2학년이 3-4학년에 비해 낮은 수치를 보였으며, 체질량지수는 2학년이 3-4학년에 비해 낮은 수치를 보였다. 여생도의 학년별 체력에는 차이가 나타나지 않았다. 체지방률에 따른 집단 간 체력은 순발력에서 20%미만 집단이 20~25%집단, 25.1~30%집단에 비해 높은 수치를 나타냈으며, 평형성은 20%미만인 집단이 25.1~30%집단에 비해 높은 수치를 나타냈다. 본 연구결과 여생도들의 학년별 신체조성에서 차이가 나타났으며, 특히 체지방률에 따라 순발력과 평형성에서 차이를 보였다. 따라서 공군사관학교 여생도는 공중 임무환경과 관련이 있는 순발력과 평형성 능력을 갖추기 위한 체지방의 관리의 필요성이 제기된다.

• Physical Therapy Rehabilitation Science
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• 제2권2호
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• pp.70-74
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• 2013

Objective: The aim of this study was to determine the impact of the application of whole body vibration training (WBV) on the balance ability of patients with an American Spinal Injury Association (ASIA) type C or D spinal cord injury. Design: Randomized controlled trial. Methods: Twelve patients with spinal cord injury were enrolled in this study. The participants were randomized to an experimental group (n=6) or control group (n=6). The subjects in the experimental group received WBV exercise and the control group received the sham exercise without vibration. The vibrations were adjusted vertically to the patient at a 30 Hz frequency and 3 mm amplitude. The whole body vibration lasted for 16 minutes in total including 5-minutes warm-up and cool-down at the beginning and end of the program, respectively. The static sitting balance ability was assessed by measuring the postural sway while sitting on the force plate with the eyes opened or closed. Postural sway length was measured for 30 seconds with a self-selected comfortable position. Results: In the static balance test, the anterio-posterior, medio-lateral, and total postural sway length with the eyes open and closed was improved significantly before and after the intervention in the experimental group (p<0.05). The experimental group showed significantly more improvement than the control group (p<0.05). Conclusions: Our results demonstrated that WBV training has a positive effect on improving static sitting balance and enhanced control of postural sway in patients with an ASIA-C or D type spinal cord injury.

• 대한임상전기생리학회지
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• 제9권2호
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• pp.13-23
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• 2011

Purpose : The purpose of this study is to investigate the effect on the static balance ability according to vestibular training using ball. Methods : Twenty normal subjects participated and were randomly assigned to either a vestibular training group using ball or a control group. The vestibular training using a ball group exercised 3 times per week over 3 weeks. The static balance was assessed by the center of pressure to the stance position. The participants stood barefoot on a force platform in a normal stance and a one-legged stance with a visual close. Results : In the normal stance, there were no significant differences at CoP surface and CoP speed. However, in a one-legged stance, there were significant differences in the vestibular training group between before and after the program. There was also a significant difference between the vestibular training group and the control group. Conclusion : Vestibular training using ball can be implemented as a therapeutic intervention to improve static balance ability in health adults.

• 한국융합학회논문지
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• 제9권5호
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• pp.239-246
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• 2018

본 연구에서는 양궁 슈팅 시 양발의 균형성과 상지 분절 및 관절의 운동학적 분석을 실시하여 점수에 따른 차이를 비교분석 하였다. K대학교 엘리트 양궁선수 9명을 피험자로 선정하였으며, 70 m 거리에서 122 cm 표적지에 각각 3발씩 5엔드를 반복 측정하였다. 7대의 적외선 카메라(Qualisys, sweden)와 2대의 지면반력기(Kistler, Switerland)를 사용하여 상지 분절 및 관절의 움직임과 힘의 작용점(center of pressure [COP])를 산출하였다. 연구결과 양궁 선수가 8점을 쐈을 때, 9-10점을 쐈을 때보다 드로잉 암(drawing-arm)의 팔굽관절 운동범위와 왼발의 좌우 COP 범위가 크게 나타났다(p<.05). 양궁 경기에서 고득점을 유지하기 위해서는 지속적인 균형성이 요구되며, 특히 슈팅하는 순간 활을 지지하는 왼발의 균형성이 중요한 요인으로 작용한다. 또한 활을 지지하는 드로잉 암의 팔굽관절 움직임을 최소화하는 것이 안정적인 슈팅에 도움이 될 것이다.

• Physical Therapy Rehabilitation Science
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• 제5권1호
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• pp.34-39
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• 2016

Objective: Hip abductors play a role in providing stability and movement to the lower limbs. The purpose of this study was to examine the effects of hip abductor fatigue on static balance and gait in the general population. Design: One group pre-test post-test design. Methods: Thirteen university students in their twenties volunteered for the study and had underwent a functional assessment. To induce fatigue, the subjects were instructed to raise their dominant lower extremity up against a load of 50% of 1 repetition maximum while producing hip abduction in a side-lying position. Subjects were instructed to maintain an abduction speed of 30 repetitions per minute to induce fatigue. Muscle fatigue was considered to be established when subjects were unable to perform hip abduction three consecutive times along with the metronome. A post-test of balance and gait was performed immediately in order to prevent fatigue recovery. The center of pressure (COP) distance area was measured using the Zebris FDM-S Multifunction Force measuring plate. Gait performance was analyzed using the GAITRite. Results: The COP distance was increased after fatigue was induced. There was a significant increase in the standard deviation of the medio-lateral and antero-posteror distance (p<0.05). Although there was no significant difference in gait parameters, there was a significant decrease in single support time after fatigue was induced (p<0.05). Conclusions: There was an increase in static balance instability and a significant decrease in single support time during gait due to hip abductor muscle fatigue.