Relationships among Knee Flexion in Stance, Knee Extension Torque and Gait Parameters during Normal Walking for Elderly Women

Stiff-knee, which indicates reduced range of knee flexion, may decrease gait stability. Although it is closely related to an increase in fall risk, the effect of limited knee flexion on the balance capacity during walking has not been well studied. This study aimed at examining how walking with limited knee flexion would influence the center of pressure (COP) trajectory and spatiotemporal gait parameters. Sixteen healthy young participants conducted four different walking conditions: normal walking and walking with limited knee flexion of their left knee up to 40 and 20 degrees, respectively. Results show that the participants walked significantly (p<0.05) slower with shorter stride length, wider step width, less cadence, and decreased stance phase when walking with limited knee flexion, compared to normal walking. The increase in the asymmetry and variability of the COP was also observed. It indicates that limited knee flexion during walking might affect the dynamic balance.

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IS IT NECESSARY TO INCLUDE BIARTICULAR EFFECTS WITHIN JOINT TORQUE REPRESENTATIONS OF KNEE FLEXION AND KNEE EXTENSION?

International Journal for Multiscale Computational Engineering ◽

10.1615/intjmultcompeng.2011002379 ◽

2012 ◽

Vol 10 (2) ◽

pp. 117-130 ◽

Cited By ~ 2

Author(s):

Mark A. King ◽

M. G. C. Lewis ◽

M. R. Yeadon

Keyword(s):

Knee Flexion ◽

Knee Extension ◽

Joint Torque

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Physical Characteristics Vary According to Body Mass Index in Japanese Community-Dwelling Elderly Women

Geriatrics ◽

10.3390/geriatrics3040087 ◽

2018 ◽

Vol 3 (4) ◽

pp. 87 ◽

Cited By ~ 3

Author(s):

Koji Nonaka ◽

Shin Murata ◽

Kayoko Shiraiwa ◽

Teppei Abiko ◽

Hideki Nakano ◽

...

Keyword(s):

Body Mass Index ◽

Walking Speed ◽

Elderly Women ◽

Knee Extension ◽

Normal Weight ◽

Physical Characteristics ◽

Community Dwelling ◽

Weight Group ◽

Normal Weight Group ◽

Knee Extension Strength

Background: Body mass index (BMI) is related to health in the elderly. The purpose of this study was to investigate the physical characteristics in underweight, overweight, and obese Japanese community-dwelling elderly women compared to normal-weight elderly women. Methods: The study participants included 212 community-dwelling elderly women. They were categorized as underweight (BMI < 18.5), normal weight (18.5 ≤ BMI ≤ 22.9), overweight (23 ≤ BMI ≤ 24.9), and obese (BMI ≥ 25). Data on skeletal muscle mass index (SMI), number of trunk curl-ups performed within 30 seconds, knee extension strength, one-leg standing time, and walking speed were recorded. Results: In the underweight group, the number of trunk curl-ups was significantly lower than that of the normal-weight group (p = 0.011) and the correlation between knee extension strength and walking speed was relatively higher than in the normal-weight group (r = 0.612 vs. r = 0.471). In the overweight group, the SMI was significantly increased (p < 0.001), but knee extension strength was not increased (p = 0.235) compared to that of the normal-weight group. In the obese group, one-leg standing time was significantly shorter than in the normal-weight group (p = 0.016). Conclusions: Physical characteristics vary according to BMI and these findings are useful in assessing and planning interventional programs to improve and maintain physical function in elderly women.

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Comparison of Biomechanical Factors between the Kicking and Stance Limbs

Journal of Sport Rehabilitation ◽

10.1123/jsr.13.2.135 ◽

2004 ◽

Vol 13 (2) ◽

pp. 135-150 ◽

Cited By ~ 29

Author(s):

Scott Ross ◽

Kevin Guskiewicz ◽

William Prentice ◽

Robert Schneider ◽

Bing Yu

Keyword(s):

Knee Flexion ◽

Reaction Force ◽

Knee Extension ◽

Knee Kinematic ◽

Vertical Ground Reaction Force ◽

Time To Peak ◽

Balance Task ◽

Vertical Ground ◽

Biomechanical Factors ◽

Anterior Posterior

Objective:T o determine differences between contralateral limbs’ strength, proprio-ception, and kinetic and knee-kinematic variables during single-limb landing.Setting:Laboratory.Subjects:30.Measurements:Hip, knee, and foot isokinetic peak torques; anterior/posterior (AP) and medial/lateral (ML) sway displacements during a balance task; and stabilization times, vertical ground-reaction force (VGRF), time to peak VGRF, and knee-flexion range of motion (ROM) from initial foot contact to peak VGRF during single-limb landing.Results:The kicking limb had significantly greater values for knee-extension (P= .008) and -flexion (P= .047) peak torques, AP sway displacement (P= .010), knee-flexion ROM from initial foot contact to peak VGRF (P< .001), and time to peak VGRF (P= .004). No other dependent measures were significantly different between limbs (P> .05).Conclusion:The kicking limb had superior thigh strength, better proprioception, and greater knee-flexion ROM than the stance limb.

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Midterm outcome and strength assessment after proximal rectus femoris refixation in athletes

Archives of Orthopaedic and Trauma Surgery ◽

10.1007/s00402-021-04189-0 ◽

2021 ◽

Author(s):

Maximilian Hinz ◽

Stephanie Geyer ◽

Felix Winden ◽

Alexander Braunsperger ◽

Florian Kreuzpointner ◽

...

Keyword(s):

Knee Flexion ◽

Rectus Femoris ◽

Knee Extension ◽

Harris Hip Score ◽

Postoperative Results ◽

Postoperative Result ◽

Strength Assessment ◽

Competitive Athletes ◽

Hip Flexion

Abstract Purpose Proximal rectus femoris avulsions (PRFA) are relatively rare injuries that occur predominantly among young soccer players. The aim of this study was to evaluate midterm postoperative results including strength potential via standardized strength measurements after proximal rectus femoris tendon refixation. It was hypothesized that the majority of competitive athletes return to competition (RTC) after refixation of the rectus femoris tendon without significant strength or functional deficits compared to the contralateral side. Methods Patients with an acute (< 6 weeks) PRFA who underwent surgical refixation between 2012 and 2019 with a minimum follow-up of 12 months were evaluated. The outcome measures compiled were the median Tegner Activity Scale (TAS) and mean RTC time frames, Harris Hip Score (HHS), Hip and Groin Outcome Score (HAGOS) subscales, International Hip Outcome Tool-33 (iHOT-33), and Visual Analog Scale (VAS) for pain. In addition, a standardized isometric strength assessment of knee flexion, knee extension, and hip flexion was performed to evaluate the functional result of the injured limb in comparison to the uninjured side. Results Out of 20 patients, 16 (80%) patients were available for final assessment at a mean follow-up of 44.8 ± SD 28.9 months. All patients were male with 87.5% sustaining injuries while playing soccer. The average time interval between trauma and surgery was 18.4 ± 8.5 days. RTC was possible for 14 out of 15 previously competitive athletes (93.3%) at a mean 10.5 ± 3.4 months after trauma. Patients achieved a high level of activity postoperatively with a median (interquartile range) TAS of 9 (7–9) and reported good to excellent outcome scores (HHS: 100 (96–100); HAGOS: symptoms 94.6 (89.3–100), pain 97.5 (92.5–100), function in daily living 100 (95–100), function in sport and recreation 98.4 (87.5–100), participation in physical activities 100 (87.5–100), quality of life 83.1 ± 15.6; iHot-33: 95.1 (81.6–99.8)). No postoperative complications were reported. Range of motion, isometric knee flexion and extension, as well as hip flexion strength levels were not statistically different between the affected and contralateral legs. The majority of patients were “very satisfied” (56.3%) or “satisfied” (37.5%) with the postoperative result and reported little pain (VAS 0 (0–0.5)). Conclusion Surgical treatment of acute PRFA yields excellent postoperative results in a young and highly active cohort. Hip flexion and knee extension strength was restored fully without major surgical complications. Level of evidence Retrospective cohort study; III.

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GAMBARAN KEKUATAN OTOT PADA LANSIA DI BPLU SENJA CERAH PANIKI BAWAH

Jurnal e-Biomedik ◽

10.35790/ebm.3.1.2015.6618 ◽

2015 ◽

Vol 3 (1) ◽

Author(s):

Prisilia M. Pinontoan ◽

Sylvia R. Marunduh ◽

Herlina I. S. Wungouw

Keyword(s):

Muscle Strength ◽

Elderly Women ◽

Elbow Flexion ◽

Knee Extension ◽

Shoulder Abduction ◽

Elderly Men ◽

Cross Sectional ◽

Purposive Sampling ◽

Shoulder Flexion ◽

Cross Sectional Design

Abstract: The aim of this study was to find out the profile of muscle strength on elderly at BPLU Senja Cerah Paniki Bawah. This was a descriptive study with cross sectional design. There were 26 respondents who met the inclusion criteria, consisted of 10 elderly men and 16 elderly women. Respondents were selected by using purposive sampling method. The measurements of the muscle strength were done by using 1 RM method while doing elbow flexion, elbow extension, shoulder flexion, shoulder extension, shoulder abduction, knee flexion, knee extension and dorsoflexion. Data were analyzed manually and computerized then presented in tabular form. The result shows that the average muscle strength in elderly men were greater than women and the average muscle strength of respondents that were included in the age group 60-79 years old were greater than those in 80-99 years.Keywords: muscle strength, elderly.1 RMAbstrak: Tujuan dari penelitian ini yaitu untuk mengetahui gambaran kekuatan otot pada Lansia di BPLU Senja Cerah Paniki Bawah. Penelitian ini merupakan peneliltian deskriptif dengan rancangan potong lintang. Responden yang memenuhi kriteria inklusi terdiri dari 26 orang yang terdiri dari 10 orang laki-laki dan 16 orang perempuan. Sampel dipilih menggunakan cara purposive sampling. Kekuatan otot pada lansia diukur dengan menggunakan metode 1 RM yang diukur pada gerakan fleksi siku, ekstensi siku, fleksi bahu, ekstensi bahu, abduksi bahu, fleksi lutut, ekstensi lutut serta dorsofleksi. Data yang sudah didapatkan kemudian dikumpul dan diolah secara manual dan komputerisasi serta disajikan dalam bentuk tabel. Hasil penelitian menunjukkan rerata kekuatan otot responden laki-laki lebih besar dibanding perempuan dan rerata kekuatan responden yang termasuk dalam kelompok umur 60-79 tahun lebih besar dibanding kelompok umur 80-99 tahun.Kata kunci: kekuatan otot, lansia, 1 RM.

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Effects of Catechin-Ingestion and Heat Stress on the Maximum Isometric Force in Knee Extension, the Volume of Quadriceps Muscle, and Serum Thiobarbituric Acid Reactive Substances Level in Healthy Elderly Women

Journal of Gerontology & Geriatric Research ◽

10.4172/2167-7182.1000148 ◽

2014 ◽

Vol 03 (02) ◽

Cited By ~ 1

Author(s):

Katsumasa Goto Hideshi Oda

Keyword(s):

Heat Stress ◽

Elderly Women ◽

Isometric Force ◽

Thiobarbituric Acid ◽

Quadriceps Muscle ◽

Knee Extension ◽

Thiobarbituric Acid Reactive Substances ◽

Healthy Elderly ◽

Maximum Isometric Force

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Effects of selectively assisting impaired subtasks of walking in chronic stroke survivors

Journal of NeuroEngineering and Rehabilitation ◽

10.1186/s12984-020-00762-7 ◽

2020 ◽

Vol 17 (1) ◽

Author(s):

Simone S. Fricke ◽

Hilde J. G. Smits ◽

Cristina Bayón ◽

Jaap H. Buurke ◽

Herman van der Kooij ◽

...

Keyword(s):

Knee Flexion ◽

Step Length ◽

Gait Training ◽

Chronic Stroke ◽

Stroke Survivors ◽

Baseline Trial ◽

Gait Parameters ◽

Flexion Extension ◽

Spatiotemporal Parameters ◽

Length Width

Abstract Background Recently developed controllers for robot-assisted gait training allow for the adjustment of assistance for specific subtasks (i.e. specific joints and intervals of the gait cycle that are related to common impairments after stroke). However, not much is known about possible interactions between subtasks and a better understanding of this can help to optimize (manual or automatic) assistance tuning in the future. In this study, we assessed the effect of separately assisting three commonly impaired subtasks after stroke: foot clearance (FC, knee flexion/extension during swing), stability during stance (SS, knee flexion/extension during stance) and weight shift (WS, lateral pelvis movement). For each of the assisted subtasks, we determined the influence on the performance of the respective subtask, and possible effects on other subtasks of walking and spatiotemporal gait parameters. Methods The robotic assistance for the FC, SS and WS subtasks was assessed in nine mildly impaired chronic stroke survivors while walking in the LOPES II gait trainer. Seven trials were performed for each participant in a randomized order: six trials in which either 20% or 80% of assistance was provided for each of the selected subtasks, and one baseline trial where the participant did not receive subtask-specific assistance. The influence of the assistance on performances (errors compared to reference trajectories) for the assisted subtasks and other subtasks of walking as well as spatiotemporal parameters (step length, width and height, swing and stance time) was analyzed. Results Performances for the impaired subtasks (FC, SS and WS) improved significantly when assistance was applied for the respective subtask. Although WS performance improved when assisting this subtask, participants were not shifting their weight well towards the paretic leg. On a group level, not many effects on other subtasks and spatiotemporal parameters were found. Still, performance for the leading limb angle subtask improved significantly resulting in a larger step length when applying FC assistance. Conclusion FC and SS assistance leads to clear improvements in performance for the respective subtask, while our WS assistance needs further improvement. As effects of the assistance were mainly confined to the assisted subtasks, tuning of FC, SS and WS can be done simultaneously. Our findings suggest that there may be no need for specific, time-intensive tuning protocols (e.g. tuning subtasks after each other) in mildly impaired stroke survivors.

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Knee strength, hop performance and self-efficacy at 4 months are associated with symmetrical knee muscle function in young athletes 1 year after an anterior cruciate ligament reconstruction

BMJ Open Sport & Exercise Medicine ◽

10.1136/bmjsem-2018-000504 ◽

2019 ◽

Vol 5 (1) ◽

pp. e000504 ◽

Cited By ~ 3

Author(s):

Susanne Beischer ◽

Eric Hamrin Senorski ◽

Christoffer Thomeé ◽

Kristian Samuelsson ◽

Roland Thomeé

Keyword(s):

Acl Reconstruction ◽

Self Efficacy ◽

Muscle Function ◽

Knee Flexion ◽

Early Stage ◽

Knee Extension ◽

Young Athletes ◽

Patient Demographics ◽

Patient Reported ◽

Flexion Strength

ObjectivesWe investigated whether patient demographics, 4-month patient-reported outcomes (PRO) and muscle function predicted young athletes regaining symmetrical muscle function in five tests of muscle function 1 year after ACL reconstruction.MethodsWe extracted data on patient demographics, PROs and the results of five tests of muscle function from a rehabilitation-specific register. Athletes were 15–30 years of age, involved in knee-strenuous sport and had undergone a primary ACL reconstruction. The primary outcome was achieving a Limb Symmetry Index of ≥90% for the battery of tests 1 year after ACL reconstruction. Patient demographics, muscle-function data and results for PROs at the 4-month follow-up were analysed.ResultsIn all, 237 athletes (59% female; mean age 22±4 years) were included in the study. One year after ACL reconstruction, 26% (62/237) of the included athletes had achieved symmetrical muscle function. Univariable analysis showed that symmetrical muscle function was associated with present self-efficacy, OR 1.28 (95% CI 1.04 to 1.58, p=0.011), knee-extension strength, OR 1.73 (95% CI 1.28 to 2.34), knee-flexion strength, OR 1.39 (95% CI 1.07 to 1.81), vertical hop, OR 1.77 (95% CI 1.27 to 2.45), single-leg hop for distance, OR 1.98 (95% CI 1.24 to 3.17) and side hop, OR 1.64 (95% CI 1.15 to 2.33).ConclusionSymmetrical knee-extension and knee-flexion strength, a more symmetrical hop performance and higher present self-efficacy at an early stage all increased the odds of achieving symmetrical muscle function in young athletes 1 year after ACL reconstruction.

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