• Title/Summary/Keyword: Knee

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The Effects of Closed Kinetic and Open Kinetic Chain Exercises Using Knee Reposition Sense in Chronic Stroke Patients

  • Lee, Kyu-Young;Shin, Won-Seob
    • The Journal of Korean Physical Therapy
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    • v.26 no.3
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    • pp.182-190
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    • 2014
  • Purpose: This study aimed to determine the effects of open kinetic chain exercise (OKCE) and closed kinetic chain exercise (CKCE) using knee reposition sensing on balance, strength, and knee joint reposition sense (JPS) in chronic stroke patients. Methods: Twenty-nine hemiplegic patients participated in this study. Participants were randomly divided into 3 groups, CKCE, OKCE, and controls, with 9, 10, and 10 participants, respectively. The CKCE group completed CKCE using knee reposition sensing, whereas the OKCE group completed OKCE using knee reposition sensing. The control group completed conventional physical therapy. Results: Significant differences between the CKCE and OKCE groups were apparent for all outcomes except the functional reaching test. The CKCE group displayed significant improvements in knee JPS versus the OKCE and control groups (p<0.01). The OKCE group displayed significant improvements in knee extensor muscle strength versus the CKCE and control groups (p<0.05). The CKCE and OKCE groups displayed significantly improvements in static balance versus the control group (p<0.05). Conclusion: CKCE and OKCE improved balance, strength, and knee JPS. Additionally, CKCE might provide a more useful intervention benefit than OKCE for increasing knee JPS, a weight-bearing task. OKCE was sufficient to improve the knee extensor muscle strength.

The Effects of an Early Knee Joint Exercise Education Program on Pain, Knee Range of Motion, and Satisfaction in Patients after Undergoing Total Knee Replacement Arthroplasty (슬관절 전치환술 후 조기 슬관절 운동 교육 프로그램이 통증, 슬관절가동범위, 환자만족도에 미치는 영향)

  • Shin, Yi Seul;Lee, Young Hee
    • Journal of Korean Clinical Nursing Research
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    • v.24 no.3
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    • pp.283-292
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    • 2018
  • Purpose: This study was conducted to evaluate the effects of early knee joint exercise education program on pain, knee ROM, and satisfaction among patients with a total knee replacement arthroplasty. Methods: An experimental study with non-equivalent groups was conducted using 32 patients for an experimental group and 32 patients for a control group. The experimental group received knee joint exercise education including systemic continuous passive motion (CPM) exercise and knee exercise. The control group received conventional CPM exercise. Pain, flexion and flexion contracture range of motion, and patient satisfaction were evaluated by $x^2$ test, Fisher's exact test, t-test, and repeated measures ANOVA using the SPSS 23.0 Windows program. Results: There were a significant improvement in patients' knee flexion and satisfaction in the experimental group compared to the control group. There was no significant difference in pain and flexion contracture between the two groups. Conclusion: The findings suggest that the proposed education program is efficient and effective when providing nursing care after a total knee replacement arthroplasty.

Gender Differences of Vertical Drop Landing Strategies in College Students

  • Yi, Chung-Hwi;Park, So-Yeon;Yoo, Won-Gyu
    • Physical Therapy Korea
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    • v.11 no.4
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    • pp.1-6
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    • 2004
  • The kinematics involved in different landing strategies may be related to the occurrence of trauma. Several sources suggest that the angle of knee extension on touchdown and impact with the ground determines the magnitude of the impact force and, indirectly, knee loading. This study compared the initial knee angle and maximum knee flexion angle at the instant of impact on drop-landings between healthy men and women. In this study, 60 participants (30 males, 30 females) dropped from a height of 43 cm. A digital camera and video motion analysis software were used to analyze the kinematic data. When landing, there was significant difference between the two groups ($15.67{\pm}6.05^{\circ}$ in male, $24.10{\pm}6.34^{\circ}$ in female) in the mean knee flexion angle. The range of knee flexion on landing ($44.06{\pm}10.97^{\circ}$ in male, $36.96{\pm}9.99^{\circ}$ in female) also differed significantly (p<.05). The greater knee flexion that was observed in the male subjects would be expected to decrease their risk of injury. Women land with smaller range of knee flexion than men and this might increase the likelihood of a knee injury.

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The Effects of Treadmill Aerobic Exercise Training on Isokinetic Muscle Strength in Students with Cerebral Palsy (트레드밀 유산소 운동이 뇌성마비학생의 등속성 근력에 미치는 영향)

  • Kang Soon-Hee
    • The Journal of Korean Physical Therapy
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    • v.16 no.4
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    • pp.1-10
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    • 2004
  • The purpose of this study was to investigate the effects of treadmill aerobic exercise training on isokinetic muscle strength in students with cerebral palsy. The subjects consisted of 9 female students with cerebral palsy between the ages of 10 to 22. The subjects performed treadmill aerobic exercise training with $0\%$ grade by free speed with three times a week for 20 minutes a session and 12 weeks. Concentric peak torque of knee flexors and knee extensors was measured before training and after training at $30^{\circ}/sec$ and $60^{\circ}/sec$ by isokinetic dynamometer. Paired t-test was used to assess changes in variables of isokinetic muscle strength. The results of analysis are as followings. 1) After training, concentric peak torque of the least affected knee flexors(p<.01) and the most affected knee flexors (p<.01) and concentric peak torque of the least affected knee extensors(p<.01) and the most affected knee extensors(p<.01) at $30^{\circ}/sec$ significantly increased. 2) After training, concentric peak torque of the least affected knee flexors(p<.05) and the most affected knee flexors(p<.01) and concentric peak torque of the least affected knee extensors(p<.05) and the most affected knee extensors(p<.01) at $60^{\circ}/sec$ significantly increased. These findings provide evidence that treadmill aerobic exercise training improves isokinetic muscle strength in students with cerebral palsy.

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Clothing Pressure and Subjective Sensations in Slacks using the Cutting Lines of the Knee Parts (슬랙스의 무릎절개선 활용에 따른 의복압 및 착용감)

  • Lee, Joung-Suk;Sung, Su-Kwang
    • Fashion & Textile Research Journal
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    • v.6 no.1
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    • pp.109-113
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    • 2004
  • The present study attempted to consider the effects of cutting lines in the knee parts of slacks on the clothing pressure and comfort. The study compared and analyzed the pressure imposed to the body in a stooping position and the consequent sensations felt by the wearer according to the slack shapes. The conclusion was drawn as follows: The pressure imposed by the slacks to the body is greater on the two points slightly upper and lower from the knee point than on the knee point itself, regardless of the slack shapes. Clothing pressure was lower in the slacks with 10 cm-wide and 14 cm-wide cutting lines in the knee parts than those with 18 cm-wide cutting lines. Subjective sensations felt in the knee parts were analyzed according to slacks shapes. As a result, it was found that slacks without cutting lines on the knee parts or with sewing lines far from the knee points were more comfortable. In slacks construction, the use of cutting lines in the knee parts can decrease pressure imposed to the knee area or improve the comfort of the slacks. When designing slacks, however, overall appearance should be considered and the weakness of cutting line that makes legs look shorter should also be complemented.

The Knee Joint Position Sense in Healthy Women (정상 성인 여성의 무릎관절 위치감각)

  • Yang, Kyung-Hye;Lee, Hyun-Ok
    • PNF and Movement
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    • v.8 no.1
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    • pp.31-39
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    • 2010
  • Purpose : The purpose of this study is to ascertain whether age, body mass index(BMI) and exercise frequency(EF) are correlated with knee joint position sense in healthy women. Methods : Healthy women of 150 who participated in this study were tested knee joint position sense; each reposition error was analyzed according to the age, BMI and EF. Reposition error was measured with a Myrin goniometer. Results : The age groups, BMI groups and EF groups demonstrated significant differences of the knee joint position sense. The older the healthy women are, the higher BMI is, and the lower EF is, the more decreased knee joint position sense has become. Conclusion : The older the women are, the higher BMI is, and the lower EF is, the more decreased the knee joint position sense in healthy women is. Therefore it needs to be considered to require management of obesity and regular exercise for prevention of knee injuries due to decreased joint position sense.

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Effect of Moxibustion Therapy on the Degenerative Arthritis of Knee Joint with Osteochondroma (골연골종을 동반한 퇴행성 슬관절염에 구법(灸法)이 미치는 영향)

  • Oh, Myung Jin;Song, Ho Sueb
    • Journal of Acupuncture Research
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    • v.29 no.6
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    • pp.111-117
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    • 2012
  • Objectives : This study was done for reporting effect of moxibustion therapy on the degenerative arthritis of knee joint with osteochondroma. Methods : Two patient with degenerative arthritis of knee joint with osteochondroma was treated by moxibustion therapy. We applied moxibustion therapy three times a day for 12 days(three days per week). To investigate effectiveness of treatment we used visual analogue scale, Korean Western Ontario and McMaster Universities. Results : 1. The moxibustion therapy deceased knee joint pain. 2. As a result of evaluation by visual analogue scale, Korean Western Ontario and McMaster Universities the score marked lower than before treatment and after treatment. Conclusion : Moxibustion therapy decreased knee joint pain that patient have degenerative arthritis of knee joint with osteochondroma.

Novel computational approaches characterizing knee physiotherapy

  • Kim, Wangdo;Veloso, Antonio P.;Araujo, Duarte;Kohles, Sean S.
    • Journal of Computational Design and Engineering
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    • v.1 no.1
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    • pp.55-66
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    • 2014
  • A knee joint's longevity depends on the proper integration of structural components in an axial alignment. If just one of the components is abnormally off-axis, the biomechanical system fails, resulting in arthritis. The complexity of various failures in the knee joint has led orthopedic surgeons to select total knee replacement as a primary treatment. In many cases, this means sacrificing much of an other-wise normal joint. Here, we review novel computational approaches to describe knee physiotherapy by introducing a new dimension of foot loading to the knee axis alignment producing an improved functional status of the patient. New physiotherapeutic applications are then possible by aligning foot loading with the functional axis of the knee joint during the treatment of patients with osteoarthritis.

A Comparison of Sex-based Differences in Knee Neuromuscular Biomechanical Factors during Basketball Rebound Jump (농구 리바운드 점프 후 착지 시 성별에 따른 무릎의 근신경 생체역학적 요인의 차이 규명)

  • Lim, Bee-Oh;Park, Yong-Hyun
    • Korean Journal of Sport Biomechanics
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    • v.17 no.3
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    • pp.23-29
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    • 2007
  • The purpose of this study were to investigate the differences between female and male basketball players in knee neuromuscular biomechanical factors during basketball rebound jump. Twelve high school female ($17.9{\pm}0.8years$) and twelve male ($19.0{\pm}1.6years$) basketball players rebound jumped for maximal vertical height to sufficiently stress the anterior cruciate ligament. Kinematic and ground reaction data were collected and combined with inverse dynamics to estimate the knee extensor and abductor torque. The EMG data from the biceps femoris and rectus femoris was used to estimate the ratio of quadriceps muscle activity. Female athletes showed more reduced knee flexion at foot contact, more increased knee abduction, extensor and abductor knee joint torque at foot contact, and quadriceps ratio at stance phase than those of male athletes. In conclusion, Female athletes showed differences in knee neuromuscular biomechanical factors than male athletes during basketball rebound jump.

Control of an above-knee prosthesis using MR damper (MR 감쇠기를 이용한 무릎 관절 의족의 제어)

  • 김정훈;오준호
    • 제어로봇시스템학회:학술대회논문집
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    • pp.244-244
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    • 2000
  • We proposed the above-knee prosthesis using rotary MR damper in which knee joint is semi-actively controlled by microprocessor. Dissipation torque in the knee joint can be controlled by the magnetic field which is induced by applying current to a solenoid, Tracking control of knee joint angle was tested by 3-DOF Leg simulator. The experimental results show that the proposed above-knee prosthesis system had good performance in swing phase tracking and repetitive controller in conjunction with a computed control law and PD control law, reduced RMS tracking error as the repetitions of tracking. Moreover, desired knee angle trajectory was generated based on the estimation of gait period with the gyro signal and the tracking control was performed.

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