• Title/Summary/Keyword: Foot pressure

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Development of an Embedded Foot Pressure Measurement System Using Time Division Measurement Method (시분할 측정기법을 이용한 임베디드 족압 측정 시스템 설계)

  • 김시경
    • Journal of Institute of Control, Robotics and Systems
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    • v.10 no.11
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    • pp.1022-1027
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    • 2004
  • In this paper, an embedded foot pressure measurement system is proposed to measure foot pressure based on the embedded Linux system. To measure foot pressure data and to evaluate foot pressure distribution for the different insoles, FSR sensor, A/D converter, iPAQ PDA, and a time division measurement method are employed in the system. Utilizing this system, the foot pressure analysis has been performed for the different four shoes. The number of foot pressure/voltage conversion circuits are drastically decreased by the proposed time division measurement method from 406 to 14. The experimental results for the sandal, slipper, oxford shoes and sneakers demonstrate that the proposed system successfully performs the foot pressure measurement.

A Last Design Utilizing an Uniform Foot Pressure FFD(UFPFFD) (족압 균등화 FFD(UFPFFD)를 이용한 라스트 설계)

  • Jang Yusung;Lee Heeman;Kim Sikyung
    • Journal of Institute of Control, Robotics and Systems
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    • v.11 no.2
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    • pp.117-121
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    • 2005
  • This paper presents a 3D last design system utilizing an uniform foot pressure FFD method. The proposed uniform foot pressure FFD(UFPFFD) is operated on the rule of foot pressure unbalance analysis and FFD. The deformation factor of the UFPFFD is constructed on the FFD lattice with the foot pressure unbalance analysis on the measured 3D foot bottom shape. In addition, the control points of FFD lattice are decided on the anatomical point and the foot pressure distribution. The 3D last design result obtained from the proposed UFPFFD is saved as a 3D dxf data format. The experimental results demonstrate that the proposed last design guarantees the balanced foot pressure distribution against on the conventional last design method.

The Comparison of Plantar Foot Pressure in Normal Side of Normal People, Affected Side and Less Affected Side of Hemiplegic Patients During Stance Phase (보행 중 입각기 시 정상 성인과 편마비 환자의 환측과 건측의 족저압 분포 비교)

  • Yoon, Hyang-Woon;Lee, Sang-Yeol;Lee, Hyun-Min
    • Journal of the Korean Society of Physical Medicine
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    • v.4 no.2
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    • pp.87-92
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    • 2009
  • Objects:The purpose of this study is to investigate the values of foot pressure of the stance phase during a gait cycle in hemiplegic gait. Method:42 patients who had a stroke and 42 healthy adults were evaluated by the RSscan system to analyze the stance phase of hemiplegic gait. The stance phase was evaluated as plantar foor pressure. Results:1) Foot plantar pressure of toe area, affected side and less affected side showed low distribution of the plantar foot pressure which is lower than plantar foot pressure of normal adults(p<0.05). 2) Foot plantar pressure of metatarsal area, showed significantly differences among hemiplesic patient's affected side and less affected side and distribution of plantar foot pressure of normal adults(p<0.05). 3) Foot plantar pressure of heel area, hemiplesic patients' affected side and less affected side showed lower distribution of the plantar foot pressure than plantar foot pressure of normal adults(p<0.05). Conclusion:The results of this study suggest that not only affected side but also less affected side in hemiplegic patients showed significantly differences in distribution of the plantar foot pressure of normal adults.

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Analysis of Plantar Foot Pressure in Skilled and Unskilled Player's during a Free Throw in Basketball (농구 자유투 동작 시 숙련자 및 미숙련자의 족저압력 분석)

  • Kim, Chang-Hyun;Lee, Joong-Sook;Jang, Young-Min
    • Korean Journal of Sport Biomechanics
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    • v.22 no.2
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    • pp.183-191
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    • 2012
  • The objective of this study was to evaluate the plantar foot pressure of skilled and unskilled players during a free throw. The experiment performed here in measured the movement route of the mean foot pressure, maximum foot pressure, and center of pressure in four event zones (ready, maximum knee flexion, release event, and maximum knee extension) for both groups while they were wearing the plantar foot pressure measurement equipment under identical conditions. The major findings are as follows. When getting ready (RD) during a free throw, the skilled player group had higher mean and maximum foot pressures, although neither variable showed significant differences statistically. For the maximum knee flexion (MF) during a free throw, the skilled player group had higher mean and maximum foot pressures, but only the mean foot pressure significantly differed statistically. For the release event (RE) during a free throw, the unskilled player group had higher mean and maximum foot pressures, but only the mean foot pressure significantly differed statistically. During the maximum knee extension (ME) of a free throw, the unskilled player group had a higher mean foot pressure, and the skilled player group had a higher maximum foot pressure. No significant correlation was found between the two groups. For the skilled player group, movement towards the center of pressure showed a stable form that moved from the rear to the front and from side to side during a free throw. For the unskilled player group, movement towards the center of pressure was unstable, which made it impossible to move from the rear to the front and from left to right.

A Study on Foot Pressure by using an Insole Equipped with the Orthogonal Grid Sensor (직교 그리드 센서가 삽입된 인솔을 이용한 족압분포 연구)

  • Son, Jeong-Hyeop;Jun, In-Jun;Chang, Seung-Hwan
    • Composites Research
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    • v.34 no.3
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    • pp.161-166
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    • 2021
  • In this study, we present a research method to develop a shoe that prevents foot injury by inducing the foot pressure. An orthogonal grid sensor was used to check the foot pressure in the upright standing position, and the change in the foot pressure distribution for various conditions was compared. We checked the conditions for distributing foot pressure efficiently by changing the spring constant of the spring inserted into the sole of the shoe and the foot pressure generated with or without the arch of the insole. In order to minimize the experimental error from the randomness of the human body's behavior, it is possible to predict through foot pressure under certain conditions through finite element analysis that simulates the pressure distribution. By checking the change of foot pressure according to the number and arrangement of springs through finite element analysis, conditions were established to provide more efficient foot pressure. The result can be used for designing footwear for patients with diabetic feet.

The Comparison of Plantar Foot Pressure Distribution in Adult and Elderly according Obstacle Heights (장애물 높이에 따른 성인과 노인의 족저압 분포 비교)

  • Chang, Jong-Sung;Lee, Myoung-Hee
    • The Journal of Korean Physical Therapy
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    • v.26 no.4
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    • pp.257-261
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    • 2014
  • Purpose: The purpose of this study was to compare plantar foot pressure distribution in adults and elderly according to obstacle height. Methods: Nine healthy adults and nine older adults were recruited and the subjects provided written informed consent consent prior to participation. Both groups walked and crossed obstacles with heights of 0%, 10%, 20%, and 30% of their height. Foot pressure was measured by peak pressure using the Pedar System (Novel Gmbh, Germany) during obstacle walking with barefeet in shoes. Three trails were calculated on eight areas and then averaged for data analysis. Results: A significant difference in great toe, little toes, and lateral metatarsal area was observed between adults and elderly groups, but other areas did not show significant differences. Foot pressure was increased in groups according to obstacle height. Conclusion: These findings showed that change in foot pressure distribution is more lateral in elderly in order to maintain postural control during obstacle crossing.

Acute Effects of Prolonged 15minnute Static Stretching on Foot Contact Area Surface and Foot Pressure Changed in Young Adults (15분간의 지속적인 스트레칭이 족저압과 족저면적 변화에 미치는 영향)

  • Kuk, Jung-Seok
    • Journal of Korean Physical Therapy Science
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    • v.18 no.4
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    • pp.59-64
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    • 2011
  • Purpose : The purpose of this study was to evaluate the effects of the stretching of the calf muscles on foot pressure and contact area in young adult. Participants stood on a wedge board that was sloped between 15~25 degree for 15min. After stretching participants stood quietly on force plate, result was recorded. Participants stood on a force plate for 1 min in eye closed condition, and them the foot pressure and area was recorded. The following variables were calculated off-line: anterior and posterior foot pressure and contact area, medial and lateral foot pressure and contact area. Results showed that anterior pressure change due to stretch, but mediolateral was not significant. This result suggested that stretching of the calf muscle has the effect of increasing anterior pressure by flexibility change on calf muscle, so this effects might be effective intervention for reduce of serious problem to neurologic patients in therapy session.

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The Foot Pressure Change Caused by Functional Leg Length Having an Effect on the Foot Temperature (기능적인 하지길이 차이에 따른 족저압 변화가 족부체열에 미치는 영향)

  • Kim, Minju;Kim, Juyeon;Lee, Hyewon;Yim, Juyeon;Ha, Hyunjin;An, Jinho
    • Journal of The Korean Society of Integrative Medicine
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    • v.1 no.2
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    • pp.37-46
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    • 2013
  • Purpose : The purpose of the research was to analyze foot pressure, foot temperature, and correlation between foot pressure and foot temperature to grasp impact on foot pressure and body temperature distribution chart depending on functional difference of leg length. Method : After measuring leg length, put 15 students whose functional difference of leg length was over 10mm to difference group and 15 students whose functional difference of leg length was under 5mm to normal group and categorize soles of foot into 6 sections of hallux head, 1st metatarsal head, 2-4 metatarsal head, 5 metatarsal head, lateral heel, and then measure by foot pressure analyzer to analyze characteristic of pressure distribution and classify into front of the lower leg, back of the lower leg, soles of foot and measure by body temperature analyzer to analyze by checking body temperature. Result : Weight difference depending on foot pressure and body temperature was bigger when functional difference of leg length was bigger, and it could be confirmed that foot pressure and body temperature of short leg side were higher than those of short leg side. Thus, if difference exists in leg length, weight load on short leg side increases which results in higher foot pressure and body temperature, therefore enabling an assumption that mechanical problem will occur in short leg. Conclusion : When functional leg length inequality, weight bearing and pressure was getting high as a result, temperature was getting high in short leg.

Influence of Trunk Stabilization Exercise upon the Lumbar Stabilization and Foot Pressure in Patients with Back Pain (체간 안정화 운동이 요통환자의 요부안정성과 족저압에 미치는 영향)

  • Lee, Woo-Jin;Park, Seol;Park, Ji-Won
    • The Journal of Korean Physical Therapy
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    • v.26 no.1
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    • pp.21-26
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    • 2014
  • Purpose: This study examined the effect of trunk stabilization exercise upon the lumbar stabilization and foot pressure on an unstable surface with back pain. Methods: The subjects of the study were 10 patients who showed the symptom of back pain with excessive lumbar curve. This study was 4 weeks, 30 minutes per session, three times a week for a total of 12 times as a result of exercise radiation imaging device and foot pressure analyzer. Results: The sacrohorizontal angle was statistically significant(p<0.05). Comparison of the difference between static right and left foot pressure ratio analysis was statistically significant(p<0.05). Dynamic right and left foot pressure comparisons for the difference was statistically significant in the analysis (p<0.05). Conclusion: Trunk stabilization exercise and the reduction of the excessive sacrohorizontal angle, and static and dynamic foot pressure imbalance reduced left and right.

Foot Pressure Analysis of Chronic Low Back Pain Patients by Foot Analyzer (Foot analyzer를 이용한 만성 요통 환자들의 족저 압력 분석)

  • Kim, Eun-Joo;Cho, Yu-Jeong;Song, Mi-Yeon
    • Journal of Korean Medicine Rehabilitation
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    • v.19 no.4
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    • pp.115-126
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    • 2009
  • Objectives : The aim of this study was to evaluate whether the foot pressure distribution correlates with the lumbo-sacral curvature, and the Oswestry Disability Index in chronic low back pain patients. Methods : We measured the fore foot pressure and the rare foot pressure using the foot analyzer in 28 women subjects with chronic low back pain. The lumbo-sacral curvature and the Oswestry Disability Index(ODI) were also measured. Results : 1. Subjects with higher ODI(%) had significantly lower Fore foot pressure/Rare foot pressure ratio(F/R ratio) (p<0.01). 2. Lumbar lordotic angle and Ferguson angle were inversely related to ODI(%) (p<0.05, p<0.01). 3. Lumbar lordotic angle and Ferguson angle were positively related to F/R ratio (all p<0.05). Conclusions : Using the Foot Analyzer(FA-48S, Tech storm Inc.) we have shown that F/R ratio has significant correlation with the lumbo-sacral curvature and the Oswestry Disability Index. These result suggest that the Foot analyzer may be used in assessing back pain in chronic low back pain patients.