scholarly journals Experimental verification tests of isokinetic equipment used in sport and rehabilitation

2021 ◽  
Vol 1199 (1) ◽  
pp. 012050
Author(s):  
G Harčarik
Keyword(s):  
Measurement System ◽  
Experimental Verification ◽  
Knee Flexion ◽  
Elbow Flexion ◽  
Knee Surgery ◽  
Maximum Strength ◽  
Lower Limbs ◽  
Main Criterion ◽  
The Difference

Abstrakt The paper deals with experimental verification of selected types of tests on isokinetic, diagnostic IsoForce2 training equipment. The isokinetic device provides accurate and immediate information about the developed strength in the exerciser's movement. The main criterion is its versatility when used in sport or rehabilitation. Therefore, it was necessary to create a portable adjustable structure that allows all the movements to be carried out and must meet other specific requirements. An important information is the amount of data collected, which is collected through the measurement system and then analyzed. The first test was elbow flexion, which was verified in arm-wrestling. The second test was knee flexion, which tested patients in rehabilitation after knee surgery to determine the difference in maximum strength between the lower limbs. The results of measurements are accurate, repeatable and provide athletes, patients, coaches and physiotherapists with immediate information about the level of strength abilities in a given type of test or movement.

scholarly journals Does the addition of single joint exercises to a resistance training program improve changes in performance and anthropometric measures in untrained men?

2018 ◽  
Vol 28 (4) ◽  
Author(s):  
Matheus Barbalho ◽  
Victor Silveira Coswig ◽  
Rodolfo Raiol ◽  
James Steele ◽  
James P. Fisher ◽  
...  
Keyword(s):  
Resistance Training ◽  
Elbow Flexion ◽  
Knee Extension ◽  
Lower Limbs ◽  
Muscle Performance ◽  
Anthropometric Measures ◽  
Resistance Training Program ◽  
Arm Circumference ◽  
Significant Difference ◽  
The Difference

The present study compared changes in muscle performance and anthropometric measures in young men performing resistance training (RT) programs composed of only multi joint (MJ) exercises, or with the addition of single joint (SJ) exercises (MJ+SJ). Twenty untrained men were randomized to MJ or MJ+SJ groups for 8 weeks. Both groups performed the same MJ exercises. The difference was that the MJ+SJ group added SJ exercises for upper and lower limbs. Participants were tested for 10 repetitions maximum (10RM), flexed arm circumference, and biceps and triceps skinfolds. Both groups significantly increased 10RM load for the bench press (MJ 38.5%, MJ+SJ 40.1%), elbow extension (MJ 28.7%, MJ+SJ 31.9%), pull down (MJ 34.0% MJ+SJ 38.5%), elbow flexion (MJ 38.2%, MJ+SJ 45.3%), leg press (MJ 40.8%, MJ+SJ 46.8%) and knee extension (MJ 26.9%, MJ+SJ 32.9%), with no significant difference between them. The decreases in biceps (MJ -3.6%, MJ+SJ –3.9%) and triceps (MJ –3.4%, MJ+SJ -3.3%) skinfolds were significant for both groups, with no difference between them. However, the flexed arm circumference increased significantly more for MJ+SJ (5.2%), than for MJ (4.0%). The use of SJ exercises as a complement to a RT program containing MJ exercises brings no additional benefit to untrained men in terms of muscle performance and skinfold reduction, though it promoted higher increases in arm circumference.

Design of Measurement System of the Center of Gravity

2013 ◽  
Vol 706-708 ◽  
pp. 733-736
Author(s):  
Fang Li
Keyword(s):  
Measurement System ◽  
Center Of Gravity ◽  
Actual Position ◽  
Ideal Position ◽  
The Future ◽  
The Difference ◽  
New System ◽  
The Ideal

It is very difficult to confirm the position of the center of gravity irregular object.This paper introduces a new system,which can be used in measuring and adjusting of the center of gravity.The irregular object was put on the support parts,then the center of gravity was given.When the actual position was compared with the ideal position,the difference was given. Until actual position and ideal position were coincided,the machining was continuing. Matlab was programmed in this measure system. It will be applied widely in the future.

Abstract TP156: Robot-Guided Ankle and Knee Therapeutic Training Improves Motor Functions in Stroke

Stroke ◽  
2016 ◽  
Vol 47 (suppl_1) ◽  
Author(s):  
Yunju Lee ◽  
Kai Chen ◽  
Richard L Harvey ◽  
Elliot J Roth ◽  
Li-Qun Zhang
Keyword(s):  
Range Of Motion ◽  
Knee Flexion ◽  
Haptic Feedback ◽  
Berg Balance Scale ◽  
Lower Limbs ◽  
Active Movement ◽  
Stroke Survivors ◽  
Movement Training ◽  
Knee Rehabilitation

Introduction: Stroke survivors develop substantial disability such as weakness, spasticity, increased stiffness, and reduced range of motion in lower limbs, contributing to reduced quality of life. It is important to stretch impaired ankle and knee to increase range of motion and reduce spasticity, and to conduct active movement training to improve balance and locomotion. Hypothesis: We addressed the hypotheses that robot-aided ankle and knee training will reduce motor impairments and improve balance and gait functions, and the improvements will maintain to the 6-weeks follow-up. Methods: Seven male stroke survivors participated in the robot-guided ankle and knee rehabilitation training using a pair of ankle and knee rehabilitation robots over 18 training sessions (3 sessions/week for 6 weeks). Three evaluations were done before and after training, and 6 weeks follow-up. Each session involved passive stretching under intelligent control and active movement training under real-time, audiovisual and haptic feedback. About equal time was spent on the ankle and knee training. Results: We found significant improvement in 6-Minute Walk Test (6MWT: 294.8 m pre-training to 386.4 m post training; p<0.01), Berg Balance Scale (BBS, 45 pre to 52 post; p<0.05), ankle active range of motion (AROM) (-11.7° pre to 1.7° post; p<0.05, a negative value means not being able to reach 0° dorsiflexion), passive ROM in dorsiflexion (12.7° pre to 23.3° post; p<0.01), and dorsiflexion muscle strength (-0.3 Nm pre to 5.7 Nm post; p<0.05, negative means lower than the passive torque at 0° ankle dorsiflexion). The knee had significant improvement in AROM in extension against the load of the robot (34.8° pre to 15.9° knee flexion post; p<0.05) and maximal flexion strength at 90° knee flexion (19.3 Nm pre to 31.7 Nm post; p<0.01). At the follow-up, the outcomes were found as similar results of post evaluation, e.g., 379m (p<0.05) in 6MWT, 51 (p<0.05) in BBS, and 5.2 Nm (p=0.05) in dorsiflexion strength. Conclusions: In conclusions, robot-guided stretching and active movement training reduced impairments at the knee and ankle of stroke survivors resulting in improved mobility. Furthermore, the effect of training was maintained at the 6-weeks follow-up after the treatment.

Use of pulse pressure method for estimating total arterial compliance in vivo

1999 ◽  
Vol 276 (2) ◽  
pp. H424-H428 ◽  
Author(s):  
N. Stergiopulos ◽  
P. Segers ◽  
N. Westerhof
Keyword(s):  
Pulse Pressure ◽  
Diastolic Pressure ◽  
Arterial Compliance ◽  
Aortic Pressure ◽  
Lower Limbs ◽  
Pressure Method ◽  
Total Arterial Compliance ◽  
The Difference ◽  
Pulse Pressure Method

We determined total arterial compliance from pressure and flow in the ascending aorta of seven anesthetized dogs using the pulse pressure method (PPM) and the decay time method (DTM). Compliance was determined under control and during occlusion of the aorta at four different locations (iliac, renal, diaphragm, and proximal descending thoracic aorta). Compliance of PPM gave consistently lower values (0.893 ± 0.015) compared with the compliance of DTM (means ± SE; r = 0.989). The lower compliance estimates by the PPM can be attributed to the difference in mean pressures at which compliance is determined (mean pressure, 81.0 ± 3.6 mmHg; mean diastolic pressure, over which the DTM applies, 67.0 ± 3.6 mmHg). Total arterial compliance under control conditions was 0.169 ± 0.007 ml/mmHg. Compliance of the proximal aorta, obtained during occlusion of the proximal descending aorta, was 0.100 ± 0.007 ml/mmHg. Mean aortic pressure was 80.4 ± 3.6 mmHg during control and 102 ± 7.7 mmHg during proximal descending aortic occlusion. From these results and assuming that upper limbs and the head contribute as little as the lower limbs, we conclude that 60% of total arterial compliance resides in the proximal aorta. When we take into account the inverse relationship between pressure and compliance, the contribution of the proximal aorta to the total arterial compliance is even more significant.

Knee Surgery and the Indian Knee: The Importance of the Preservation of Flexion

1989 ◽  
Vol 19 (1) ◽  
pp. 21-24 ◽  
Author(s):  
R N Villar ◽  
V K Solomon ◽  
J Rangam
Keyword(s):  
Knee Flexion ◽  
Third World ◽  
Degenerative Disease ◽  
Knee Surgery ◽  
The West ◽  
The Third ◽  
Mission Hospital ◽  
The Third World ◽  
Indian Mission ◽  
Knee Pathology

The pattern of knee pathology seen in an Indian mission hospital following the introduction of knee clinics is described. This paper reports the results of the first 200 consecutive patients seen at these clinics, relating the findings to anticipated treatments. The occurrence of degenerative disease was high. The importance of knee flexion, in order to be able to squat, is highlighted. The necessity to adopt this position materially alters the types of treatment that can be offered to this group of people. It is concluded that treatments common to the West are not always suitable for patients in the Third World.

scholarly journals Manfaat Rendaman Air Hangat dan Garam dalam Menurunkan Derajat Edema Kaki Ibu Hamil Trimester III

2020 ◽  
Vol 7 (2) ◽  
pp. 76
Author(s):  
Sawitry Sawitry ◽  
Fitria Hikmatul Ulya ◽  
Elisabet Jemsi Adepatiloy
Keyword(s):  
Pregnant Women ◽  
Quantitative Research ◽  
Mean Value ◽  
Lower Limbs ◽  
Wilcoxon Test ◽  
Warm Water ◽  
Third Trimester ◽  
Post Test ◽  
The Difference ◽  
Leg Edema

ABSTRAK Edema kaki terjadi hampir 80% dari semua kehamilan dan dapat menimbulkan ketidaknyamanan selama kehamilan seperti nyeri, merasa berat, kram pada malam hari, penebalan kulit, dan pigmentasi. Salah satu intervensi non farmakologis untuk mengurangi edema adalah rendaman air hangat dan garam yang merupakan intervensi untuk menghilangkan edema pada ekstremitas bawah  selama kehamilan. Menganalisis  pengaruh rendaman air hangat dan garam  terhadap edema kaki ibu hamil trimester III. Penelitian kuantitatif dengan metode quasy eksperimental one group pre test post test desaign. Sampel penelitian sebanyak 16 ibu hamil Trimester III dengan teknik accidental sampling. Analisis data menggunakan uji Wilcoxon. Terjadi penurunan tingkat edema kaki pada ibu hamil dengan selisih nilai tengah edema kaki sebelum 4,00 dan setelah perlakuan sebesar 0,00  .Uji Wilcoxon menunjukkan ρ value 0,000. Ada pengaruh rendaman air hangat dan garam  terhadap edema kaki ibu hamil trimester III. Kata Kunci : rendaman air hangat dan garam; edema; tungkai bawah ; ibu hamil.  THE EFFECT OF WARM WATER AND SALT IMMERSION IN DECLINING LEG EDEMA OF THIRD TRIMESTER PREGNANT WOMEN  ABSTRACT Edema of the legs occurs in almost 80% of all pregnancies and can cause discomfort during pregnancy such as pain, feeling heavy, cramps at night, skin thickening, and pigmentation. One of the non-pharmacological interventions to reduce edema is soaking in warm water and salt which is an intervention to relieve edema in the lower extremities during pregnancy. This study was to determine the effect of warm water and salt immersion in declining leg edema of third trimester pregnant women. This quantitative research used quasy experimental method one group pre test post test desaign. The total samples were 16 respondents with purposive sampling and random sampling techniques. Data analysis used the Wilcoxon test. The difference in the mean value of leg edema before 4.00 and after treatment was 0.00. The Wilcoxon test showed ρ value of 0.000. There is an effect of warm water and salt immersion on leg edema of third trimester pregnant women.   Keywords: warm water and salt soaking; edema; lower limbs; pregnant mother

CHANGES IN THE FLEXOR AND EXTENSOR MUSCLES AT DIFFERENT SPEEDS

2021 ◽  
Vol 27 (7) ◽  
pp. 686-688
Author(s):  
Rui Ma ◽  
Wenyan Li
Keyword(s):  
Knee Joint ◽  
Peak Torque ◽  
Muscle Group ◽  
Lower Limbs ◽  
Flexor Muscle ◽  
Level Of Evidence ◽  
Isokinetic Test ◽  
Extensor Muscles ◽  
Test Velocity ◽  
The Difference

ABSTRACT Introduction: Centrifugal strength is an important element for strength quality. Developing muscle centrifugal strength can effectively increase the stability of lower limbs and reduce the risk of injury. Objective: To explore the characteristics of contractile force of flexor ahods in strength training and rehabilitation training, and the extensor muscles of the knee joint in athletes with different speeds of centripetal force. Methods: The knee joint muscle group of 8 first-level male high jumpers and 8 second-level male high jumpers were tested by isokinetic centrifugal contraction; the angular test velocity was 60 °/s, 120 °/s, 240 °/s, and the indexes included peak torque, relative peak torque (peak torque/body weight), and the peak torque flexural extension ratio. Results: With the centrifugal contraction of the knee joint muscle group (P < 0.05), the second-level high jumpers should increase the ability of the knee flexor muscle group of the take-off leg. In the case of constant velocity centrifugal contraction (P < 0.01), taking off time must be reduced, that is, taking off speed must be accelerated. Conclusions: The difference in the knee joint muscle isokinetic test results is one of the reasons for the difference in knee joint flexor and extensor muscle contractility under the different speed forces of high jumpers. Level of evidence II; Therapeutic studies - investigation of treatment results.

scholarly journals Elastic compression treatment of chronic superficial venous insufficiency of the lower limbs based on Doppler venous pressure index measurements

2015 ◽  
Vol 4 (1) ◽  
Author(s):  
Leonardo Corcos ◽  
Daniele Pontello ◽  
Tommaso Spina
Keyword(s):  
Venous Insufficiency ◽  
Varicose Veins ◽  
Venous Pressure ◽  
Lower Limbs ◽  
Compression Stockings ◽  
Elastic Compression ◽  
Pressure Index ◽  
Counter Pressure ◽  
The Difference ◽  
Compression Treatment

Ineffectiveness or discomfort from graduated elastic compression stockings (GES) in patients with chronic venous insufficiency (CVI) and/or varicose veins of the lower limbs (VVLL) can depend of inappropriate counter pressure applied. Counter pressure was calculated by Doppler venous pressure index (VPI). The aim of this study was to verify the value VPI in the choice of GES. A total of 1212 LL of 606 patients subjected to VPI measurements VPI correlated with the various sites of reflux (R) and C of Clinical-Etiology-Anatomy-Pathophysiology (CEAP) classification. The difference between standing VPI the and normal values=counter pressure to be applied by GES. Questionnaire to 96 patients with CVI/VVLL wearing GES. Mean VPI values: greater saphenous (GSV)&gt;smaller saphenous; GSV with isolated venous reflux (R) at the leg&gt;GSV at the thigh; additional R in perforators increases VPI in all the districts; superficial R increases VPI in PT. Relation between VPI/C of CEAP: P&lt;0.05-0.0001; 81/83/96 (97.5%) patients improved; 0 complained. R in GSV at the leg and in perforators increases VPI in deep veins. Few discrepancies VPI/CEAP can be expected. Standing VPI is highly predictive. The best choice of GES can be based on the VPI measurement.

Evaluation and optimization of vehicle pedal comfort based on biomechanics

2019 ◽  
Vol 234 (5) ◽  
pp. 1402-1412
Author(s):  
Liqing Chen ◽  
Wanjun Li ◽  
Yang Yang ◽  
Wei Miao
Keyword(s):  
Muscle Activation ◽  
Resistance Coefficient ◽  
Lower Limbs ◽  
Accelerator Pedal ◽  
Noticeable Effect ◽  
The Road ◽  
Emg Signal ◽  
Optimal Value ◽  
The Difference ◽  
Point Distance

Existing research on the manipulation comfort of the cab pedal generally focuses on the completion of the pedal movement when a vehicle is at rest, with certain data collected for analysis. This paper, by taking passenger vehicles in China as the study object and in view of the actual road conditions in China and the Chinese body size, attempts to solve the problem of muscle redundancy through the maximum/minimum optimization model of muscle activation. The road test was carried out on a typical pavement in a Chinese city. The parameters of pedal stroke, pedal force, and typical Electromyography signal (EMG) signal of drivers’ lower limbs during driving were obtained, from which muscle activation degree was calculated. The obtained experimental data were used as external driving one to simulate and analyze the pedal comfort under the layout of different human percentile and different pedal parameters in an aim to obtain the optimal value. The results indicate that the difference in pedal strokes, pedal preload, pedal resistance coefficients, seat heights, and H-point distances can have a noticeable effect on muscle activation. Taking a 95th-percentile accelerator pedal as an example, with the optimal values of each parameter selected (pedal preload: 8.2 N, pedal resistance coefficient: 2.55, seat height: 0.45 m and H-point distance: 0.86 m), as the pedal strokes increase, muscle activation shows a trend of increase after initial decrease. In the common stroke of a pedal after optimization, the degree of muscle activation is significantly lower than that before optimization, indicating a decrease in muscle fatigue.

Knee Arthroplasty with Prior Ligamentous Knee Surgery: A Matched Case–Control Study

2020 ◽  
Author(s):  
Nirav K. Patel ◽  
Christopher J. Hadley ◽  
Samantha Leite ◽  
Shyam Brahmabhatt ◽  
Donald Mazur ◽  
...  
Keyword(s):  
Knee Arthroplasty ◽  
Short Form ◽  
Oxford Knee Score ◽  
International Knee Documentation Committee ◽  
Knee Surgery ◽  
Hardware Removal ◽  
Complication Rates ◽  
Total Knee ◽  
Matched Case ◽  
The Difference

AbstractWe aimed to evaluate the timing, operative details, and outcomes of total knee arthroplasty (TKA) in patients with prior ligamentous knee surgery (LKS). All consecutive patients undergoing TKA with prior LKS at a single institution were identified from a large prospectively collected database. Patients were matched on a 2:1 basis according to age, sex, and body mass index to a group of patients without previous LKS undergoing primary TKA. A total of 39 patients with prior LKS and a mean age of 55.6 years (range: 42.8–76.4) were identified and matched with 78 patients without LKS with a mean age of 57.6 years (range: 44.0–79.4) undergoing primary TKA (p = 0.24). Significantly more posterior stabilized implants were used in patients with LKS compared with control patients (29 [74.3%] vs. 27 [34.6%], p < 0.001). In the LKS group, 15 patients (38.4%) required hardware removal. Postoperative complications and rate of further surgery were greater in the LCS group, but the difference was not significant (10.6 vs. 6.4%, p = 0.25). Mean difference in pre- to postoperative knee flexion and clinical outcome scores (12-item Short Form Survey, International Knee Documentation Committee, and Oxford Knee Score) were similar between the two groups, with no cases of loosening or osteolysis. TKA with prior LKS often warranted hardware removal and generally more constrained implants. Those patients with prior LKS undergoing subsequent TKA have higher complication rates and an increased rate of subsequent surgery related to post-TKA stiffness.

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