Comparison of H：Q Ratios According to Flexion Angle and Angular Velocity of Hip Joint in Isokinetic Muscular Strength of Knee Joint

2018 ◽  
Vol 14 (1) ◽  
pp. 103-108
Author(s):  
Won-Sik Bae ◽  
Keon-Cheol Lee ◽  
Hyeon-Su Kim
Keyword(s):  
Angular Velocity ◽  
Knee Joint ◽  
Hip Joint ◽  
Muscular Strength ◽  
Flexion Angle

scholarly journals Pengaruh Kelelahan Terhadap Kinematik Atlet Rowing

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Trian Rizki Fauzan ◽  
Agus Rusdiana ◽  
Hamidie Ronald Daniel Ray
Keyword(s):  
Angular Velocity ◽  
Knee Joint ◽  
Hip Joint ◽  
T Test ◽  
Paired Sample ◽  
Ergometer Rowing

Kelelahan merupakan faktor yang dapat mempengaruhi kualitas gerak seorang atlet, salah satunya yaitu kinematik seorang atlet seperti perubahan pada postur, sudut sendi, dan kordinasi antar sendi ketika atlet tersebut mengalami kelelahan. Oleh karena itu tujuan dari penelitian ini adalah untuk mengetahui pengaruh kelelahan terhadap kinematik atlet rowing UKM Dayung UPI. 10 orang anggota Unit Kegiatan Mahasiswa Dayung UPI nomor rowing berpartisipasi dalam penelitian ini. Desain yang digunakan dalam penelitian ini adalah One Group Pretest – Posttest Design. Instrument pengambilan data menggunakan 1 handycams (Sony 32GB HDR-PJ540), 1 Accutrend Plus, 100-meter ergometer rowing test, dan Burpee (Squat Thrust). Penelitian ini dianalisis dengan menggunakan Paired Sample T-test, dengan tingkat (Sig. 0.05). Hasil dari penelitian ini menunjukan bahwa terdapat perbedaan yang signifikan pada Angle of Hip Joint at Finish Phase (p= 0.005), Angle of Knee Joint at Finish Phase (p= 0.007), Angular Velocity of Hip Joint at Drive Phase (p= 0.006), dan Angular Velocity of Knee Joint at Drive Phase (p= 0.027) saat atlet rowing mengalami kelelahan. Hal ini menunjukan bahwa kelelahan dapat menjadi salah satu faktor yang mempengaruhi kinematik atlet rowing.

scholarly journals Knee Proprioception and Strength and Landing Kinematics During a Single-Leg Stop-Jump Task

2013 ◽  
Vol 48 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Takashi Nagai ◽  
Timothy C. Sell ◽  
Anthony J. House ◽  
John P. Abt ◽  
Scott M. Lephart
Keyword(s):  
Knee Joint ◽  
Knee Flexion ◽  
Muscular Strength ◽  
Biomechanical Analysis ◽  
Flexion Angle ◽  
Knee Flexion Angle ◽  
Knee Strength ◽  
Peak Knee ◽  
The Relationship ◽  
Flexion And Extension

Context The importance of the sensorimotor system in maintaining a stable knee joint has been recognized. As individual entities, knee-joint proprioception, landing kinematics, and knee muscles play important roles in functional joint stability. Preventing knee injuries during dynamic tasks requires accurate proprioceptive information and adequate muscular strength. Few investigators have evaluated the relationship between knee proprioception and strength and landing kinematics. Objective To examine the relationship between knee proprioception and strength and landing kinematics. Design Cross-sectional study. Setting University research laboratory. Patients or Other Participants Fifty physically active men (age = 26.4 ± 5.8 years, height = 176.5 ± 8.0 cm, mass = 79.8 ± 16.6 kg). Intervention(s) Three tests were performed. Knee conscious proprioception was evaluated via threshold to detect passive motion (TTDPM). Knee strength was evaluated with a dynamometer. A 3-dimensional biomechanical analysis of a single-legged stop-jump task was used to calculate initial contact (IC) knee-flexion angle and knee-flexion excursion. Main Outcome Measure(s) The TTDPM toward knee flexion and extension, peak knee flexion and extension torque, and IC knee-flexion angle and knee flexion excursion. Linear correlation and stepwise multiple linear regression analyses were used to evaluate the relationships of both proprioception and strength against landing kinematics. The α level was set a priori at .05. Results Enhanced TTDPM and greater knee strength were positively correlated with greater IC knee-flexion angle (r range = 0.281–0.479, P range = .001–.048). The regression analysis revealed that 27.4% of the variance in IC knee-flexion angle could be accounted for by knee-flexion peak torque and TTDPM toward flexion (P = .001). Conclusions The current research highlighted the relationship between knee proprioception and strength and landing kinematics. Individuals with enhanced proprioception and muscular strength had better control of IC knee-flexion angle during a dynamic task.

The Analysis of Proprioception Alteration during First Five Months after Anterior Cruciate Ligament Reconstruction

2018 ◽  
Vol 1 (84) ◽  
Author(s):  
Vilma Jurevičienė ◽  
Albertas Skurvydas ◽  
Juozas Belickas ◽  
Giedra Bušmanienė ◽  
Dovilė Kielė ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Angular Velocity ◽  
Knee Joint ◽  
Cruciate Ligament ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Starting Position ◽  
Angular Velocities ◽  
Anterior Cruciate

Research  background  and  hypothesis.  Proprioception  is  important  in  the  prevention  of  injuries  as  reduced proprioception  is  one  of  the  factors  contributing  to  injury  in  the  knee  joint,  particularly  the  ACL.  Therefore, proprioception appears not only important for the prevention of ACL injuries, but also for regaining full function after ACL reconstruction.Research aim. The aim of this study was to understand how proprioception is recovered four and five months after anterior cruciate ligament (ACL) reconstruction.Research methods. The study included 15 male subjects (age – 33.7 ± 2.49 years) who had undergone unilateral ACL reconstruction with a semitendinosus/gracilis (STG) graft in Kaunas Clinical Hospital. For proprioceptive assessment, joint position sense (JPS) was measured on both legs using an isokinetic dynamometer (Biodex), at knee flexion of 60° and 70°, and at different knee angular velocities of 2°/s and 10°/s. The patients were assessed preoperatively and after 4 and 5 months, postoperatively.Research results. Our study has shown that the JPS’s (joint position sense) error scores  to a controlled active movement is significantly higher in injured ACL-deficient knee than in the contralateral knee (normal knee) before surgery and after four and five months of rehabilitation.  After 4 and 5 months of rehabilitation we found significantly lower values in injured knees compared to the preoperative data. Our study has shown that in injured knee active angle reproduction errors after 4 and 5 months of rehabilitation were higher compared with the ones of the uninjured knee. Proprioceptive ability on the both legs was  independent of all differences angles for target and starting position for movement. The knee joint position sense on both legs depends upon the rate of two different angular velocities and the mean active angle reproduction errors at the test of angular velocity slow speed was the highest compared with the fast angular velocity. Discussion and conclusions. In conclusion, our study shows that there was improvement in mean JPS 4 and 5 months after ACL reconstruction, but it did not return to normal indices.Keywords: knee joint, joint position sense, angular velocity, starting position for movement.

scholarly journals VASTUS LATERALIS OBLIQUE ACTIVITY DURING GAIT OF SUBJECTS WITH PATELLOFEMORAL PAIN

2017 ◽  
Vol 23 (2) ◽  
pp. 88-92
Author(s):  
Gilmar Moraes Santos ◽  
Karina Gramani Say ◽  
Flávio Pulzatto ◽  
Thiele de Cássia Libardoni ◽  
Larissa Milani Brognoli Sinhorim ◽  
...  
Keyword(s):  
Knee Joint ◽  
Vastus Lateralis ◽  
Pain Syndrome ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Flexion Angle ◽  
Oblique Muscle ◽  
Electromyographic Activity ◽  
Healthy Controls ◽  
Patellar Stability

ABSTRACT Introduction: So far, little is known about the behavior of electromyographic activity of vastus lateralis oblique muscle during treadmill gait in subjects with and without patellofemoral pain syndrome. Objective: The purpose of this study was to investigate the electromyographic activity of the patellar stabilizers muscles and the angle of the knee joint flexion in subjects with and without patellofemoral pain syndrome. Method: Fifteen subjects without (21 ± 3 years) and 12 with patellofemoral pain syndrome (20 ± 2 years) were evaluated. The electromyographic activity and flexion angle of the knee joint were obtained during gait on the treadmill with a 5 degree inclination. Results: The knee flexion angle was significantly lower in the subjects with patellofemoral pain syndrome when compared with the healthy controls. The electromyographic activity of vastus lateralis longus was significantly greater during gait on the treadmill with inclination in subjects with patellofemoral pain syndrome. The results also showed that the electromyographic activity of vastus lateralis oblique and vastus medialis oblique were similar in both groups, regardless of the condition (with/without inclination). Conclusion: We have shown that knee kinematics during gait differs among patients with and without patellofemoral pain syndrome and healthy controls and that a different motor strategy persists even when the pain is no longer present. In addition, the findings suggested that the vastus lateralis oblique has a minor role in patellar stability during gait.

The effect of patient positioning on the accuracy and reliability of assessment of knee range of motion over a telemedicine platform

2021 ◽  
pp. 1357633X2110467
Author(s):  
Sean Wei Loong Ho ◽  
Kelvin Guoping Tan ◽  
Eng Chuan Neoh ◽  
Jiayen Wong ◽  
Atiq Syazwani Roslan ◽  
...  
Keyword(s):  
Knee Joint ◽  
Range Of Motion ◽  
Supine Position ◽  
Knee Flexion ◽  
Patient Positioning ◽  
Flexion Angle ◽  
Visual Estimation ◽  
Limits Of Agreement ◽  
Joint Range Of Motion ◽  
Joint Range

Introduction Diagnostic accuracy is one of the key considerations of telemedicine usage in orthopedic surgery. The aim of this study was to determine the optimal patient positioning to achieve accurate and reliable visual estimation of the knee joint range of motion over a digital platform for telemedicine. Methods A single volunteer was recruited to perform a total of 120 discrete and random knee range of motion angles in three patient positions: sitting, standing and supine. The patient image was broadcast over a digital platform to six raters. The raters recorded their visual estimation of each discrete knee flexion angle independently. After each discrete knee flexion angle, a physical goniometer was used to obtain the actual flexion angle of the knee. Results A total of 120 discrete measurements (40 measurements in the sitting, standing, and supine positions each) were recorded by each of the six raters. The supine position resulted in the highest intraclass correlation of 0.97 (95% confidence interval: 0.98, 0.99). All three patient positions achieved low absolute difference between the goniometer and the raters with 5.6 degrees (95% limits of agreement: −21.0, 9.8) in sitting, 2.7 degrees (95% limits of agreement: −10.1, 15.4), and 1.2 degrees (95% limits of agreement: −9.8, 12.3) in the supine position. The supine position had the highest accuracy and reliability. Discussion Visual estimation of the knee joint range of motion over telemedicine is clinically accurate and reliable. Patients should be assessed in a supine position to obtain the highest accuracy and reliability for visual estimation of the knee joint range of motion during telemedicine.

Effects of the Angular Velocity on Muscle Activity during the Knee Joint Isokinetic Contraction

2012 ◽  
Vol 48 ◽  
pp. 913-923
Author(s):  
Jong Woo Ryu ◽  
Nyeon Ju Kang ◽  
Soo Hyuk Kim ◽  
Young Ho Shin ◽  
Ho Youl Kang ◽  
...  
Keyword(s):  
Angular Velocity ◽  
Knee Joint ◽  
Muscle Activity ◽  
Isokinetic Contraction

scholarly journals Physiological Gait versus Gait in VR on Multidirectional Treadmill—Comparative Analysis

Medicina ◽  
2019 ◽  
Vol 55 (9) ◽  
pp. 517 ◽  
Author(s):  
Katarzyna Jochymczyk-Woźniak ◽  
Katarzyna Nowakowska ◽  
Jacek Polechoński ◽  
Sandra Sładczyk ◽  
Robert Michnik
Keyword(s):  
Comparative Analysis ◽  
Knee Joint ◽  
Hip Joint ◽  
Pelvic Tilt ◽  
Plantar Flexion ◽  
Center Of Mass ◽  
The Body ◽  
Joint Rotation ◽  
Active Motion ◽  
Flexion Extension

Background and objectives: Virtual reality (VR) is increasingly often finding applications in physiotherapy and health promotion. Recent years have seen the use of advanced technologies in the promotion of physical activity (PA) in society. New simulators, e.g., treadmills, enable the performance of PA (e.g., locomotive movements) in VR (artificially created virtual world). The question of how such movements are similar to natural forms of human locomotion (march, run) inspired the comparative analysis of physiological gait and gait in VR on a multidirectional Omni treadmill. Materials and Methods: The tests involved the use of the BTS Smart system for the triplanar analysis of motion. The test involved 10 healthy females aged 20–24 (weight: 52 ± 3.1 kg, height 162 ± 5.4 cm). Measurements were performed at two stages. The first stage involved the standard assessment of physiological gait, whereas the second was focused on gait forced by the Omni treadmill. The following gait parameters were analyzed: Flexion-extension in the ankle, knee joint and hip joint, rotation in the hip joint and knee joint, foot progression, adduction-abduction in the knee joint and hip joint, pelvic obliquity, pelvic tilt, pelvic rotation as well as energy expenditure and the movement of the body center of mass. Results: The analysis of the test results revealed the existence of differences in the kinematics of physical gait and gait on the treadmill. The greatest differences were recorded in relation to the dorsal-plantar flexion in the ankle, the foot progression, the rotation of the knee joint, pelvic tilt and rotation. In addition, the gait on the treadmill is characterized by the longer duration of the stance phase and reduced ranges of the following movements: Flexion-extension in the ankle, knee joint and hip joint, adduction-abduction in the hip joint as well as rotation in the ankle and hip joint. The values of potential, kinetic and total energy recorded in relation to forced gait are significantly lower than those of physiological gait. Conclusions: Because of the fact that the parameters of gait on the Omni platform vary significantly from the parameters of physical gait, the application of the Omni treadmill in the re-education of gait during rehabilitation should be treated with considerable care. Nonetheless, the treadmill has adequate potential to become a safe simulator enabling active motion in VR using locomotive movements.

scholarly journals Comparison of Post-Operative Muscular Strength Between Gamma Nailing and Hemiarthroplasty System in Femoral Intertrochanteric Fractures

2017 ◽  
Vol 11 (1) ◽  
pp. 255-262 ◽  
Author(s):  
Mitsuaki Noda ◽  
Yasuhiro Saegusa ◽  
Masayasu Takahashi ◽  
Chisa Noguchi ◽  
Chihiro Yoshikawa ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Muscle Strength ◽  
Hip Joint ◽  
Muscular Strength ◽  
Weight Bearing ◽  
Control Group ◽  
Intertrochanteric Fractures ◽  
Early Weight Bearing ◽  
Abduction Strength ◽  
Flexion Strength

Background: The current study focuses on the comparison of postoperative muscular strength around the hip joint of patients with femoral intertrochanteric fractures treated either by cephalo-medullary (CM) nailing or a new bipolar hip prosthesis (BHP), an especially attached device to secure displaced greater trochanteric fragment. Methods: Twenty patients treated with CM nailing were age- and sex- matched with a control group of 20 patients treated with BHP. Maximum isometric forces at the bilateral hip joint were measured during the follow up period. Means of 3 measurements were represented. Results: The mean and standard deviation values (kg) of muscle strength at the non-operative/ operative side in the CM nailing group were as follows: flexion strength 9.5±4.7/8.5±4.9 (P=0.06), extension strength 6.2±3.5/5.5±3.7 (P=0.08), abduction strength at 0 degrees 7.7±3.5/6.2±2.8 (p=0.002), abduction strength at 10 degrees 5.5±2.0/4.2±2.0 (p=0.001). In the BHP group, mean and standard deviation values of muscle strength at the non-operative/ operative side were as follows: flexion strength 6.5±2.8/6.0±3.4 (P=0.08), extension strength 4.4±0.9/4.4±0.6 (P=0.83), abduction strength at 0 degrees 5.1±1.9/5.0±1.6 (p=0.12), and that at 10 degrees 4.7±1.4/4.6±1.3 (p=0.10). Conclusion: Our results demonstrate that CM nailing may cause a 25-30% decrease in postoperative muscle strength around the hip joint, particularly during hip abduction. With the new BHP, greater trochanter reduction is achieved allowing early weight bearing and maintaining strength in abduction. Surgeons should consider postoperative muscular strength as one of the necessary factors for selection of the appropriate surgical procedure. Level of Evidence: Therapeutic Level III.

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