• PNF and Movement
• /
• 제18권1호
• /
• pp.97-106
• /
• 2020

Purpose: This study aimed to determine the most effective way to facilitate the abductor hallucis muscle during PNF leg pattern-emphasized hallux abduction. Methods: The study recruited 18 healthy adults. All participants agreed voluntarily to take part in the study following an explanations of its purpose and procedures. They randomly performed the PNF leg pattern-emphasized hallux abduction variations in a hook-lying or sitting position. Activation of the abductor hallucis (AbH), adductor hallucis (AdH), extensor hallucis longus (EHL), and tibialis anterior (TA) muscles, and the ratio of AbH/AdH, were measured during PNF exercises using electromyography. One-way repeated ANOVA was used to compare the activation of foot intrinsic and extrinsic muscles during the four PNF exercises. Results: PNF leg pattern-emphasized hallux abduction using normal timing was significantly higher in TA compared to PNF leg pattern-emphasized hallux abduction using timing for emphasis, regardless of the starting position. The PNF leg pattern-emphasized hallux abduction using timing for emphasis in the hook-lying position was significantly higher in AbH than in other exercises. Although there was no statistically significant difference in the ratio of AbH/AdH, it was higher in the hook-lying position. Conclusion: PNF leg pattern-emphasized hallux abduction using timing for emphasis in the hook-lying position can be recommended as a method to optimize the activation of AbH and the ratio of AbH/AdH.

• 문화기술의 융합
• /
• 제6권2호
• /
• pp.341-348
• /
• 2020

본 연구의 목적은 4주간 20대 성인에게 앉은자세와 누운자세에 따른 복식호흡운동을 적용하였을 때 호흡기능과 배근육의 근활성도를 비교하여 어떤 자세에서의 운동이 효과적인지 알아보고자 하였다. 기립자세에서는 호흡운동 후 일초량이 가장 큰 수치를 보였고 누운자세에서는 호흡운동 전 일초량과 1초간노력성날숨량이 가장 크게 나타났다. 두자세의 복식호흡운동 전후 일초량과 날숨량 분산분석결과 운동전일초량, 운동후일초량, 운동전1초간날숨량, 운동후1초간날숨량 모두 유의한 차이를 보이며, 두 자세에서 복식호흡 전후 차이를 알 수 있었다. 기립자세, 누운자세에서 운동전에는 왼쪽 복직근, 운동후에는 오른쪽 복직근이 가장 높은 근활성도를 보였다. 두 자세 운동의 반복측정한 분산분석 결과 운동 전과 후의 양쪽 복직근과 외복사근은 근활성도 모두 차이를 보이지 않았다(p>.05). 기립자세에서 운동 전과 후에 왼쪽 외복사근이 유의한 차이를 보였고(p<0.05), 운동전과 후 FEV1/FVC와 노력성 호기량이 유의한 차이를 보였다(p<0.05). 운동 전과 후 왼쪽 외복사근이 누운자세에서 가장 높은 근활성도를 보였고 노력성 호기량은 가장 낮은 근활성도를 보였다. 운동 전과 후 호흡량 및 근활성도의 반복측정된 분산분석 결과에서 오른쪽 복직근에서 유의한 차이를 보였다(p<.05). 이를 통해 앉은 자세와 비스듬히 누운자세 두가지 자세에서 복식호흡 운동을 적용 하였을 때 호흡기능과 배근육의 근활성도 전,후를 비교하기 위해서는 두가지 자세에서의 운동 전,후 호흡과 근활성도 평가가 필요하고 평가에 따라서 어떤 자세에서의 운동이 더 효과적인지 알 수 있었다. 추후 연구에서는 좀 더 세분화되고 정확한 호흡기능과 근활성도를 알아보는 다양한 연령대의 사람들에게 장기간의 중재를 통해 파악하는 연구가 필요할 것으로 사료된다.

• 대한기계학회논문집A
• /
• 제34권2호
• /
• pp.167-174
• /
• 2010

본 논문에서는 사무용 의자의 틸트 동작시 요추지지 기능과 등의 미끄럼을 평가함으로써 등판 회전중심의 최적 위치를 연구하였다. 이를 위해 인체와 의자로 이루어진 수학적 모델을 이용하여 틸트 동작 시뮬레이션을 수행하였다. 착석된 인체 모델의 측면 상에서 고관절 중심을 포함한 42개의 위치에 등판 회전축 위치를 설정하고 각각 시뮬레이션을 수행하였다. 또한 등판의 회전중심이 고관절에 위치한 의자 시작품과 좌판하부에 위치한 기존의 의자에 대해 동작분석 실험도 함께 수행하였다. 시뮬레이션 결과 등판의 회전중심이 고관절 중심에 가까이 위치할수록 틸트시 요추각도 변화량과 등의 미끄럼거리는 작아졌다. 한편 실험결과 착석자의 등과 등판사이의 이격변위와 미끄럼변위는 등판의 회전중심이 고관절 위치에 설계된 시작품에서 더 작게 측정되었다. 시뮬레이션과 실험결과로부터 등판의 회전중심이 인체의 고관절 위치에 가깝게 설계되면 틸트시 착석자의 요추를 효과적으로 지지해 줄 수 있음을 알 수 있었고 이때 착석자는 보다 편안하고 건강한 착석자세를 유지할 수 있다. 이 결과는 사무용 의자에서 등판 회전축 위치의 인간공학적 설계를 위한 가이드라인을 제공한다.

• The Journal of Korean Physical Therapy
• /
• 제27권5호
• /
• pp.315-319
• /
• 2015

Purpose: The purpose of this study was to investigate the effect of leg-crossing positions on muscle activities of rectus femoris, tensor fascia latae, and hamstring in healthy 20's adults. Methods: Twenty healthy subjects were asked to perform three leg-crossing positions, leg crossing (LC), tailor crossing (TC), and ankle crossing (AC). Surface electromyography (EMG) was used to evaluate the activities of rectus femoris, tensor fascia latae, and hamstring during upright sit posture (UP) and three leg-crossing positions and UP was compared to three leg-crossing positions. Repeated one way ANOVA was used for data analysis. The alpha level was set at 0.05. Results: The results showed significant difference in the muscle activities of rectus femoris, tensor fascia latae, and hamstring among leg-crossing positions. The muscle activity of the rectus femoris was significantly lower in LC and TC positions than UP. The muscle activity of tensor fascia latae was significantly higher in LC position than UP and other leg-crossing positions. The muscle activity of hamstring was significantly higher in LC and TC positions and significantly lower in AC position than in UP. Conclusion: Our study suggests that the activity of hip muscles was affected by pelvic and knee alignment in various leg-crossing positions.

• 대한산업공학회지
• /
• 제23권4호
• /
• pp.779-791
• /
• 1997

The purpose of this study is to measure a perceived joint discomfort in the seated and standing position, and to provide ranking systems of perceived joint discomfort. Nineteen mole subjects with no history of musculo-skeletal disorders participated in the experiment. Their physical characteristics were: age $-25.4{\pm}2.7$years, stature $-171.9{\pm}6.0cm$, and body weight $-67.1{\pm}7.0kg$. The results showed that the perceived joint discomforts were different depending upon the joints involved in motion and their movement directions (degree of freedom of motions), which implied that the human body motions and their degrees of freedom should be classified into several distinct classes that need to be assigned different weights of postural stress. Therefore, three ranking systems based on the perceived joint discomforts were suggested, which were classified by the degree of freedom of motions and joints, by only degree of freedom motions, and by joints involved in motion, respectively. In the seated position, the hip movement was the most stressful, the bock was the second, and the shoulder was the third. Likewise, in the standing postures, the hip was the most, the bock was the second, and the ankle was the third. It was expected that these joint motion ranking systems could be used by practitioners of health and safety to improve the comfort of working postures in industry.

• The Journal of Korean Physical Therapy
• /
• 제22권5호
• /
• pp.63-70
• /
• 2010

Purpose: In this study, children with cerebral palsy were treated for 8 weeks using horse riding trunk proprioception, stability and posture to investigate the effect of hippotherapy in the field of physical therapy. Methods: A total of 18 subjects were divided into an experimental group treated by horseback riding and a control group. Both groups were evaluated pre- and post-treatment. Trunk proprioception was measured three times in the sitting position with their eyes and ears closed to reach the target position the angle error of the mean was calculated. Trunk stability was measured using a forceplate and the data were used to calculate the postural sway path & postural sway velocity. Posture was evaluated using the Posture Assessment Scale (PAS). Results: After hippotherapy, the experimental group showed a significant improvement in trunk proprioception, stability and posture (p<0.05), but the control group improved in posture only (p<0.05). Trunk proprioception, stability and posture was significantly different between the two groups (p<0.05). Conclusion: Eight weeks of hippotherapy is effective in improving trunk proprioception, stability, and posture. Research using this therapy should be studied further as a possible new therapeutic approach in the field of physical therapy.

• 대한물리의학회지
• /
• 제11권3호
• /
• pp.1-9
• /
• 2016

PURPOSE: The purpose of this study was to identify the effects on flexibility of bridge and plank exercises using sling suspension on an unstable surface. METHODS: The subjects of this study were 20 healthy adults in their 20s (plank=10, bridge=10). Both types of exercise were performed three times per week for a period of four weeks. Each exercise was performed in the front and side direction. Exercise intensity was altered through the use of a sling, which was placed at the knee and ankle. Flexibility at trunk forward flexion and backward extension was measured. The trunk forward flexion was measured at sitting position. The trunk backward extension was measured at prone position. The data were analyzed by Two-way ANOVA. RESULTS: There were significant differences in the pre- and post-test for both the bridge and plank exercise groups. In the bridge exercise, significant differences were shown in the trunk forward flexion and the trunk backward extension (p<.05). In the plank exercise, a significant difference was shown in the trunk backward extension (p<.05). No significant differences were noted in interaction effect or the main effects in either group. CONCLUSION: Bridge and plank exercises on an unstable surface improve flexibility. The bridge exercise improves the flexibility of the forward and backward muscles of the trunk. The plank exercise improves the flexibility of the forward muscles of the trunk. This information would be useful in the development of exercise programs including bridge and plank exercises for improving flexibility and core stability.

• Journal of Yeungnam Medical Science
• /
• 제6권2호
• /
• pp.241-245
• /
• 1989

저자들은 안정 와위시 완전 방실차단을 보이고, 좌위로 체위변동과 아트로핀 투여로 야기된 빈맥시 1도 방실차단으로 호전된 서맥의존성 방실차단의 예를 경험하였으며, 인공 심박조율기로 효과적으로 치료하였기에 문헌 고찰과 함께 보고하는 바이다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2005년도 심포지엄 논문집 정보 및 제어부문
• /
• pp.51-53
• /
• 2005

Considerable noise is sometimes associated with degeneration of the hee joint surface. Such noise may indicate roughness or softening of the cartilage surfaces, and may be a useful index for early disease. In this study, we have evaluated arthritic pathology using the acoustical analysis of knee joint sounds. During sitting and standing periods, subjects' active knee flexion and extension were monitored. Fundamental frequency, mean amplitude of pitch, jitter and shimmer were analyzed according to the position and the joint angle. The result showed that the fundamental frequency of the 2nd patient group and standing position was higher than the others, and that the pitch of sounds changed unstably. These results suggest that an analysis of knee joint sound might assist non-invasive diagnosis of an articular pathology.

• 대한정형도수물리치료학회지
• /
• 제19권2호
• /
• pp.19-22
• /
• 2013

Background: Excessive pronation of the feet can cause excessive inner rotation of the femur, followed by increased stress in the gluteus maximum, increased front slope of the pelvis, and lumbar lordosis, which leads to lumbar pain. The aim of the present study was to use the navicular drop test to examine foot pronation that can cause lumbar lordosis and to determine whether the navicular drop is lower in patients diagnosed with lumbar disc than in patients without this diagnosis. Methods: The Navicular Drop score was set by subtracting the navicular height at a standing position from the navicular height in a sitting position. The Navicular Drop measurements for college student with and without Lumbar Herniated Intervertebral Disc were compared using an independent t-test. Results: The control group were measured right $7.44{\pm}2.96$ and left $8.04{\pm}3.23$. The experimental group were measured right $2.12{\pm}1.33$ and left $2.80{\pm}1.29$. Therefore significant difference was found between the two groups (p<0.05). Conclusions: The navicular drop affected lumbar herniated intervertebral disc.