• 한국의류학회지
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• 제45권4호
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• pp.586-597
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• 2021

This study analyzed clothing pressure, blood flow, and subjective sensations among women in their 50s and 60s while wearing commercially available yoga bra tops (YBTs). These findings could then serve as basic data for designing YBT for women in this age range. Clothing pressure and blood flow reactions were measured in seven participants wearing four commercially available YBTs. Subjective sensations of pressure and comfort were also evaluated. The calculated data were analyzed using the SPSS 24.0 statistical program. The results suggested that YBT4 exerted the lowest clothing pressure, while YBT2 and YBT3 exerted relatively higher clothing pressures. Participants' blood flow decreased while wearing YBTs compared to the control garment. The decrease of 47.3% when the participants wore YBT2 was especially significant. The results confirmed that the blood velocity rate was physiologically lower while wearing all four YBTs than when wearing the control garment. Results for subjective pressure and overall comfort confirmed that YBT2 and YBT3 exerted relatively high pressure, while YBT4 did not exert pressure.

• Journal of Acupuncture Research
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• 제32권3호
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• pp.27-40
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• 2015

Objectives : This study was performed to evaluate the effects of water extract of Cervi Parvum Cornu(CPC), Aconiti Lateralis Radix Preparata(ALR), and Yongbu-tang(YBT) on suppression of the receptor activator of nuclear factor kappa-B ligand(RANKL)-induced osteoclast differentiation and bone resorption. Methods : The effects of CPC, ALR, YBT extracts on osteoclast differentiation were determined by culture of bone marrow macrophage(BMM). The mRNA expression levels of the nuclear factor of activated T-cells cytoplasmic 1(NFATc1), c-Fos and tartrate-resistant acid phosphatase(TRAP) in BMMs were analyzed by reverse transcriptase polymerase chain reaction(RT-PCR). Similarly, the protein expression levels of NFATc1, c-Fos, mitogen-activated protein kinase(MAPK)s and ${\beta}$-actin in cell lysates were measured by western blotting. In addition, effects of CPC, ALR and YBT extracts were determined by means of Lipopolysaccharide(LPS)-induced bone-loss with mice. Results : CPC, ALR and YBT extracts showed remarkable inhibition on RANKL-induced osteoclast differentiation without cytotoxicity. CPC and ALR extracts significantly reduced the protein expression level of NFATc1. YBT extract significantly reduced the mRNA expression levels of c-Fos, NFATc1 and the protein expression levels of c-Fos, NFATc1, AKT, p38, c-Jun N-terminal kinase(JNK). Further, YBT extract suppressed degradation of$ I-{\kappa}B$. And ALR extract significantly restored the bone erosion by LPS treatment in mice. Conclusions : YBT extract showed more remarkable inhibition on osteoclast differentiation than CPC and ALR extracts in vitro. ALR extract showed remarkable inhibition on bone resorption in vivo. Thus, YBT extract can be a useful treatment for bone-loss diseases such as osteoporosis.

• 한국응용과학기술학회지
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• 제40권6호
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• pp.1249-1258
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• 2023

본 연구의 목적은 YBT(Y-balance test) 시 지지발의 COP 변인이 활동발의 상대도달거리와 종합점수에 미치는 영향을 밝히는 것이다. 연구의 대상자로 20대 성인 남성 26명(연령: 24.4±3.0 년, 신장: 171.0±10.5 cm, 체중: 72.1±12.1 kg 다리길이: 88.2±5.8 cm)이 연구에 참여하였다. 연구의 측정도구인 YBT를 통하여 활동발의 상대도달거리, 종합점수, 지지발의 COP 변인들을 좌우발에서 측정하여 결과를 도출하였다. YBT 시 지지발의 COP 변인이 상대도달거리와 종합점수가 미치는 영향을 알아보기 위하여 다중회귀분석을 이용하였다. 이에 따른 연구결과로, YBT 동안 오른발 지지 시 후외측 방향에서 전후, 좌우 COP속도, COP속도의 영향이 크고, 왼발 지지 시 후내측 방향에서 전후, 좌우 COP속도, COP속도의 영향으로 상대도달거리 및 종합점수를 향상시켰다.

• 한국전문물리치료학회지
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• 제30권3호
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• pp.194-201
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• 2023

Background: Falls are a common and serious problem in the elderly population. Muscle strength and balance are important factors in the prevention of falls. The Y-balance test (YBT) is used to assess dynamic postural control and shows excellent test-retest reliability. However, no studies have examined the relationship between lower-limb strength and YBT scores in elderly women. Objects: This study aimed to examine the relationship between lower-limb strength and YBT scores in elderly women. Methods: Thirty community-dwelling elderly women participated in the study. Lower-limb strength including hip flexor, hip extensor, hip abductor (HAB), hip adductor (HAD), knee flexor, knee extensor, ankle dorsiflexor, and ankle plantar flexor (PF) muscles was examined using a smart KEMA strength sensor (KOREATECH Inc.), and the YBT was used to assess dynamic balance. Relationship between lower-limb strength and YBT was demonstrated using a Pearson's correlation coefficient. Results: HAB strength (r = 0.388, p < 0.05), HAD strength (r = 0.362, p < 0.05), and ankle PF strength (r = 0.391, p < 0.05) positively correlated with the YBT-anterior direction distance. Ankle PF strength was positively correlated with the YBT-posteromedial direction distance (r = 0.396, p < 0.05) and composite score (r = 0.376, p < 0.05). Conclusion: The results of this study suggest that HAB, HAD, and ankle PF strengths should be considered for dynamic postural control in elderly women.

• 한국응용과학기술학회지
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• 제40권5호
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• pp.977-987
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• 2023

본 연구의 목적은 시각정보로 양안시와 단안시 사용 시 Y-Balance Test(YBT) 수행이 YBT 절대도달거리, 수행점수와 압력중심 변인을 통하여 동적균형에 미치는 영향을 알아보고자 하였다. 연구의 대상자로 20-30대 성인 18명(연령: 23.17±1.72 년, 신장: 172.46±9.84 cm, 체중: 73.39±11.44 kg 다리길이: 88.89±5.69 cm)이 연구에 참여하였다. 양안 및 단안 사용으로 동적 균형 측정을 위하여 YBT를 통하여 절대도달거리, 종합점수, COP 변인들을 좌우발에서 측정하여 결과를 도출하였다. 연구결과로 YBT 시 후외측, 후내측, 종합점수에서 단안 차단(좌우 눈 차단)이 양안 사용보다 절대도달거리 및 종합점수가 높게 나타났다. COP 결과로, 전방 및 후내측 도달 시 차이가 나타나지 않았지만, 후외측 도달 시 전후 COP 속도에서 왼발은 단안 차단이 양안시 보다 전후 COP 속도가 느리게 나타났고, COP 속도에서 왼발은 단안 차단이 양안시 보다 COP 속도가 느리게 나타났다.

• 한국운동역학회지
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• 제27권3호
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• pp.165-169
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• 2017

Objective: The Star Excursion Balance Test (SEBT) and Y-Balance Test (YBT) have been commonly applied to measure dynamic postural stability ability. These two tests are utilized interchangeably in various settings. However, they could in fact require different movements to assess dynamic postural stability, as one uses a platform and different measuring techniques than the other. The purpose of this study was to determine if there was a significant difference in the kinematic patterns in physically active population while performing the SEBT and the YBT. Method: Seventy participants performed in the Anterior (AN), Posteromedial (PM), and Posterolateral (PL) directions of the SEBT and the YBT. The kinematics of hip, knee, and ankle in sagittal plane was calculated and analyzed. Paired-sample t-tests were performed to compare joint angular displacement in the ankle, knee, and hip between the SEBT and the YBT. Results: Significant differences in angular displacement at the hip, knee, and ankle joints in the sagittal plane between performance on the SEBT and on the YBT were observed. Conclusion: Clinicians and researchers should not apply these dynamic postural control tasks interchangeably from one task to another. There appear to be kinematic pattern differences between tests in healthy physical active population.

• 턱관절균형의학회지
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• 제11권1호
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• pp.37-40
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• 2021

본 증례에서는 목과 어깨의 자세 틀어짐이 육안으로 관찰되는 환자에게 턱관절음양균형요법으로 긍정적인 자세변화의 효과를 얻어 보고하는 바이다.

• 한국응용과학기술학회지
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• 제40권4호
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• pp.606-615
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• 2023

본 연구의 목적은 Y-Balance Test(YBT)를 통하여 무게부하 증가가 동적 균형에 미치는 영향을 알아보고자 하였다. 연구의 대상자는 20-30대 남녀 성인 18명(연령: 23.17±1.72 years, 신장: 172.46±9.84 cm, 체중: 73.39±11.44 kg 다리길이: 88.89±5.69 cm)이 실험에 참여하였다. 동적 균형 측정을 위하여 YBT를 통하여 도달거리와 종합점수, COP 변인들을 측정하여 결과를 도출하였다. 연구결과로 YBT 시 후내측과 후외측 도달거리, 종합점수에서 무게부하일 때 동적 균형이 향상되었다. COP 결과로, 전방 도달 동안 전후진폭, 좌우 COP속도, COP 면적은 오른발에서 무게부하 시 동적 균형이 향상되었지만, 후내측 도달 동안 차이가 없었고, 후외측 도달 동안 좌우진폭은 왼발에서, 전후 COP속도는 왼발, 좌우 COP속도와 COP속도는 좌우발에서, COP 면적은 좌우발의 무게부하 시 동적 균형이 향상되었다.

• 한국전문물리치료학회지
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• 제27권4호
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• pp.286-291
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• 2020

Background: Anterior cruciate ligament reconstruction (ACLR) causes a reduction in the balance of the lower extremities. Static and dynamic balance were evaluated separately to confirm the decrease in balance in patients underwent ACLR. The commonly used methods include the Biodex Balance System (BBS) for static balance and the Y balance test (YBT) for dynamic balance. No study has evaluated whether the static and dynamic balance of the involved side recovers as much as the uninvolved side one year after ACLR. Objects: The purpose of this study was to investigate the recovery of static and dynamic balance between the involved and the uninvolved sides. Methods: The BBS (overall, anteroposterior index, and mediolateral index) and YBT (anterior, posterolateral, and posteromedial) of 58 patients underwent ACLR were measured one year postoperation. Both sides of the BBS and the YBT were compared using the paired t-test. Results: All the index of the BBS showed no difference between the involved and the uninvolved sides, while all the scores of the YBT showed a significant difference in both sides. The YBT anterior result was 54.64 ± 5.62 cm in the involved side and 56.90 ± 5.41 cm in the uninvolved side (p = 0.001). The YBT posterolateral results were 90.12 ± 10.51 cm and 92.34 ± 9.85 cm (p = 0.013). The YBT posteromedial results were 93.72 ± 8.84 cm and 96.14 ± 9.37 cm (p = 0.002). Conclusion: A year after ACLR, the static balance showed no difference, while the dynamic balance showed a significant difference in the involved and the uninvolved sides. The static balance of the involved side recovered as much as the uninvolved side, but the dynamic balance did not. Therefore, dynamic balance training should be considered in the rehabilitation program for patients underwent ACLR.

• 한국응용과학기술학회지
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• 제39권1호
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• pp.96-107
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• 2022

이 연구는 중학교 야구선수를 대상으로 8주간의 케틀벨 훈련이 기능적 움직임 및 균형성에 미치는 영향을 분석하고자 하였다. 중학교 야구선수 14명을 케틀벨 집단(n=8), 통제 집단(n=6)으로 무작위 배정한 후 케틀벨 훈련을 주 2회, 60분간 실시하였다. 그리고, 훈련 전과 8주 훈련 후 FMS, Y-밸런스 테스트 및 스마트 슈즈를 이용하여 정적, 동적 균형성을 검사하였다. 케틀벨 훈련 효과를 검증하기 위해 반복이원변량분석을 실시하였고, 시기와 집단 간 상호작용이 있을 경우 집단 별로 대응표본 t-검정을 실시하였다. 연구 결과, FMS 점수는 IL(Inline Lunge)과 FMS 총점(TS)에서 유의한 차이가 나타났으며, FMS의 다른 변인에서는 유의한 차이가 없었다. YBT 점수는 왼쪽 AT를 제외한 모든 YBT변인에서 유의한 차이가 나타났다. 또한 Smart shoes를 이용한 균형성 검사에서는 모든 변인에서 집단과 시기 간 유의한 상호작용 효과는 나타나지 않았다. 결론적으로 중학교 야구선수의 케틀벨 훈련 적용은 기능적 움직임과 기능적 균형성과 관련된 FMS 및 YBT 점수에는 효과가 있었지만, 족압분포로 평가하는 Smart Shoes를 사용한 정적/동적 균형성에는 영향을 미치지 않는 것으로 나타났다. 이 연구의 결과들은 중학교 야구선수의 훈련 프로그램 작성에 필요한 기초자료로 제공될 수 있을 것으로 판단된다.