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Journal articles on the topic 'Isokinetic knee strength'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Alt, Tobias, Igor Komnik, Jannik Severin, et al. "Swing Phase Mechanics of Maximal Velocity Sprints—Does Isokinetic Lower-Limb Muscle Strength Matter?" International Journal of Sports Physiology and Performance 16, no. 7 (2021): 974–84. http://dx.doi.org/10.1123/ijspp.2020-0423.

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Purpose: Concentric hip and eccentric knee joint mechanics affect sprint performance. Although the biarticular hamstrings combine these capacities, empirical links between swing phase mechanics and corresponding isokinetic outcome parameters are deficient. This explorative study aimed (1) to explain the variance of sprint velocity, (2) to compare maximal sprints with isokinetic tests, (3) to associate swing phase mechanics with isokinetic parameters, and (4) to quantify the relation between knee and hip joint swing phase mechanics. Methods: A total of 22 sprinters (age = 22 y, height = 1.81 m,

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Yılmaz, A. K., M. Kabadayı, Ö. Bostancı, M. Özdal, and M. H. Mayda. "Analysis of isokinetic knee strength in soccer players in terms of selected parameters." Physical education of students 23, no. 4 (2018): 209–16. http://dx.doi.org/10.15561/20755279.2019.0408.

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Purpose: The aim of study is to analyse isokinetic knee strength in soccer players in terms of selected parameters. Methods: A total of 30 subjects, 15 soccer players and 15 controls, were included in the study. Isokinetic knee strength measurements at angular speeds of 60°sec-1, 180°sec-1 and 240°sec-1 and pro-agility tests were conducted on the subjects. A body analyser was used for height, weight and body mass indexes (BMI) values. The training ages of the subjects and the positions of the soccer player group were recorded on personal information forms. Results: When the agility parameters

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Lee, Jong Baek, and Young Kyun Kim. "The Relationship between Isokinetic Trunk, Leg Strength and Isometric Mid-Thigh Pull Test, Counter Movement Jump in National Rowing Athletes." Asian Journal of Kinesiology 22, no. 3 (2020): 34–42. http://dx.doi.org/10.15758/ajk.2020.22.3.34.

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OBJECTIVES The purpose of this study was to analyze the relationship between isokinetic leg strength and maximum Isometric Med-Thigh Pull Test(IMTP) and maximum height of Counter Movement Jump (CMJ) in Korean national rowers.METHODS Each eight male and female athletes were participated in the study. Isometric IMTP, CMJ, and isokinetic trunk, hip, and knee strength were measured to analyze the relationship between the IMTP, CMJ and isokinetic strength. The correlation between variables was analyzed by the step-wise method of multiple regression analysis after analyzing the correlation between d

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Crotty, N. M. Nuala, Katherine A. J. Daniels, Ciaran McFadden, Niall Cafferkey, and Enda King. "Relationship Between Isokinetic Knee Strength and Single-Leg Drop Jump Performance 9 Months After ACL Reconstruction." Orthopaedic Journal of Sports Medicine 10, no. 1 (2022): 232596712110638. http://dx.doi.org/10.1177/23259671211063800.

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Background: Deficits in knee strength after anterior cruciate ligament reconstruction (ACLR) surgery are common. Deficits in the single-leg drop jump (SLDJ), a test of plyometric ability, are also found. Purpose: To examine the relationship between isokinetic knee strength, SLDJ performance, and self-reported knee function 9 months after ACLR. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Knee isokinetic peak torque, SLDJ jump height, contact time, and reactive strength index (RSI), as well as International Knee Documentation Committee (IKDC) scores were assessed in 116 m

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Kobayashi, Yuji, Junjiro Kubo, Takeo Matsubayashi, Akifumi Matsuo, Kando Kobayashi, and Naokata Ishii. "Relationship Between Bilateral Differences in Single-Leg Jumps and Asymmetry in Isokinetic Knee Strength." Journal of Applied Biomechanics 29, no. 1 (2013): 61–67. http://dx.doi.org/10.1123/jab.29.1.61.

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The aims of the study were to investigate the differences in kinematics and kinetics between the dominant and nondominant leg during single-leg jumps without arm swing, and to determine the relationship between bilateral asymmetry in isokinetic knee strength and the single-leg jump. Isokinetic knee strength and single-leg jump kinematics and kinetics were measured in 11 male participants. The bilateral asymmetry index was calculated for each parameter. For isokinetic knee strength, there were no significant differences between the dominant and nondominant legs. Significant correlations were ob

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Kim, Hyun-mok, Chang-kook Kim, Jung-wook Lee, and Sung-hwan Lee. "The Effects of a Rehabilitation Exercise Program After Posterior Cruciate Ligament (PCL) Reconstruction Between Genders." Asian Journal of Kinesiology 24, no. 1 (2022): 39–45. http://dx.doi.org/10.15758/ajk.2022.24.1.39.

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OBJECTIVES The purpose of this study was to examine the effects of a rehabilitation exercise program after posterior cruciate ligament (PCL) reconstruction between genders.METHODS The research subjects were 22 patients who had posterior cruciate ligament reconstruction. They were divided into Male Group (n=11) and Female Group (n=11). The dependent variable was Lysholm knee score, IKDC (International Knee Document Committee) score, isokinetic muscle strength of knee joint, which it was measured Pre-Op (Previous Operation) and during the 24-week rehabilitation exercise program period, it was me

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Li, Zongzhen. "ISOKINETIC MUSCLE STRENGTH TESTING AND TECHNOLOGY OF TRAINING IN SPORTS MEDICINE." Revista Brasileira de Medicina do Esporte 28, no. 6 (2022): 757–59. http://dx.doi.org/10.1590/1517-8692202228062022_0050.

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ABSTRACT Introduction Current research in sports medicine on muscles adjacent to joints in patients with joint instability focuses on functional instability. However, few studies on muscle strength in the muscles adjacent to the joints in typical patients. Objective This study tests the changes in isokinetic muscle strength in flexion-extension muscle groups in common subjects’ knees and elbows. Methods Randomly selected ordinary citizens to perform isokinetic muscle strength testing with grip strength, explosive pedaling force, and elbow and knee joint movement speeds of 60°/s. Results The si

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Carlson, Kevin. "Assessment of Post-Rehabilitation ACL Reconstructed Knees." International Journal of Kinesiology and Sports Science 8, no. 2 (2020): 33. http://dx.doi.org/10.7575//aiac.ijkss.v.8n.2p.33.

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Background: Understanding objective measures of ACL-reconstructed knee function is important in determining the efficacy of rehabilitation protocols and a patient’s return to activities of daily living and sport activities. Objective: To assess the range of motion (ROM), isokinetic strength (torque) and functional performance measures (hop test) of ACL-reconstructed and ACL-intact knees. Methods: Twelve volunteers (5 females, 7 males) with unilateral ACL injury and reconstruction were given a battery of tests (hop test for distance, knee range of motion, knee extensor isokinetic testing to ass

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Johannsson, Gudmundur, Gunnar Grimby, Katharina Stibrant Sunnerhagen, and Bengt-Åke Bengtsson. "Two Years of Growth Hormone (GH) Treatment Increase Isometric and Isokinetic Muscle Strength in GH-Deficient Adults*." Journal of Clinical Endocrinology & Metabolism 82, no. 9 (1997): 2877–84. http://dx.doi.org/10.1210/jcem.82.9.4204.

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Abstract GH deficiency in adults is associated with reduced muscle mass and muscle strength. The objective of this trial was to follow the effect of 2 yr of GH treatment in GH-deficient adults on muscle performance in relation to a reference population. Knee extensor and flexor strengths for isometric and isokinetic concentric muscle strength were measured using a Kin-Com dynamometer. Hand-grip strength was measured in both hands. The fatigue index was calculated as the percent reduction in peak torque at 50 repeated isokinetic knee extensions. Superimposed, single twitch electrical stimulatio

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Patel, Rohita R., Debra E. Hurwitz, Charles A. Bush-Joseph, Bernard R. Bach, and Thomas P. Andriacchi. "Comparison of Clinical and Dynamic Knee Function in Patients with Anterior Cruciate Ligament Deficiency." American Journal of Sports Medicine 31, no. 1 (2003): 68–74. http://dx.doi.org/10.1177/03635465030310012301.

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Background Whether passive measures of isokinetic muscle strength deficits and knee laxity are related to the dynamic function of the anterior cruciate ligament-deficient knee remains unclear. Hypotheses Arthrometer measurements are not predictive of peak external knee flexion moment (net quadriceps muscle moment), isokinetic quadriceps muscle strength correlates with peak external knee flexion moment (net quadriceps muscle moment), and isokinetic hamstring muscle strength correlates with peak external knee extension moment (net flexor muscle moment). Study Design Cross-sectional study. Method

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Khan, Fayaz, Haris Anjamparuthikal, and Mohamed Faisal Chevidikunnan. "The Comparison between Isokinetic Knee Muscles Strength in the Ipsilateral and Contralateral Limbs and Correlating with Function of Patients with Stroke." Journal of Neurosciences in Rural Practice 10, no. 04 (2019): 683–89. http://dx.doi.org/10.1055/s-0039-1700612.

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Abstract Objective The aim of this study is to compare the isokinetic knee muscles peak torque measurements and proprioception between the affected and intact limbs of patients with stroke, in addition to finding the correlation between knee muscles strength and lower limb function. Methods Twelve patients with stroke (mean age 64.33 ± 6.140 years), with 3 to 7 months poststroke who can walk 25 feet independently without using or using assistive devices and full passive range of motion were included in the study. Biodex isokinetic dynamometer was used for measuring isokinetic strength at 90°/s

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Whyte, Enda, Siobhán O’Connor, Hannah Tobin Jones, et al. "The relationship between hamstring strength tests and sprint performance in female Gaelic footballers: A correlation and linear regression analysis." PLOS ONE 19, no. 6 (2024): e0302901. http://dx.doi.org/10.1371/journal.pone.0302901.

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Objectives To investigate the relationships between handheld dynamometer (HHD), isokinetic and Nordic hamstrings exercise (NHE) measurements of knee flexor strength and their association with sprinting performance. Design Cross-sectional Methods The relationships between HHD (prone isometric, prone break and supine break knee flexor strength tests), isokinetic and NHE peak knee flexor strength measures were examined using Pearson product correlations on 38 female footballers. A linear regression analysis was also performed for each pair of dependent variables (10 and 30 metre sprint times) and

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Chen, Chao, Zhalel Ali, Muhammad Abdul Rehman Rashid, et al. "Relationship between isokinetic strength of the knee joint and countermovement jump performance in elite boxers." PeerJ 11 (December 6, 2023): e16521. http://dx.doi.org/10.7717/peerj.16521.

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Background The lower limbs play a key role to develop the linear momentum for hitting power in effective boxing. The knee extensor and flexor strength guarantees the dynamic stability of boxers. The insufficient extensor strength of the lower extremities causes compensation during flexion resulting in movement errors or damage to knee joint muscles. This study was conducted to explore the isokinetic concentric strength of the knee flexor and extensor and the relationship between isokinetic knee extensors strength and countermovement jump (CMJ) performance in elite boxers. Methods Thirteen elit

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Schiltz, Marc, Cédric Lehance, Didier Maquet, Thierry Bury, Jean-Michel Crielaard, and Jean-Louis Croisier. "Explosive Strength Imbalances in Professional Basketball Players." Journal of Athletic Training 44, no. 1 (2009): 39–47. http://dx.doi.org/10.4085/1062-6050-44.1.39.

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Abstract Context: Despite the high rate of lower limb injuries in basketball players, studies of the dominant-limb effect in elite athletes often neglect injury history. Objective: To determine lower limb explosive-strength asymmetries in professional basketball players compared with junior basketball players and control participants. Design: Cohort study. Setting: Academic medical institution. Patients or Other Participants: 15 professional basketball players, 10 junior basketball players, and 20 healthy men. Main Outcome Measure(s): We performed an isokinetic examination to evaluate the knee

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Yoon, Dong Hyun, and Dong Hyun Yoon. "Specific Fitness Profiles through Analysis of the Correlation between Anaerobic Power, Maximal Strength, and Isokinetic Strength in Korean National Snowboarders." IJASS(International Journal of Applied Sports Sciences) 33, no. 2 (2021): 151–58. http://dx.doi.org/10.24985/ijass.2021.33.2.151.

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Purpose: We examined the associations between anaerobic power, maximal strength, and isokinetic strength in Korean National snowboarders. Methods: We examined cross-sectional associations between isokinetic trunk strength in 89 Korean National snowboarders (mean age: 22.17 ± 4.82 years). The main outcome measures were the Wingate anaerobic power test, maximal strength test, and isokinetic knee strength test. Results: Isokinetic trunk strength was correlated with anaerobic power (lower average power, peak power, and power-drop rate). Further, trunk strength flexion and extension were significan

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Hamdan, Paulo Cesar, Humberto Lameira Miranda, Thiago Gomes de Paula, Eduardo Becker Nicoliche, Victor Rodrigues Amaral Cossich, and Jose Inácio Salles Neto. "ISOKINETIC RESPONSE, VISCOSUPPLEMENTATION AND STRENGTH TRAINING IN GONARTHROSIS." Revista Brasileira de Medicina do Esporte 26, no. 3 (2020): 258–61. http://dx.doi.org/10.1590/1517-869220202603191514.

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ABSTRACT Introduction Viscosupplementation and strength training are proposed interventions in the treatment of knee osteoarthritis. Objective To describe the isokinetic response in women with knee osteoarthritis who underwent both interventions. Methods A double-blind, randomized clinical trial involving thirty women diagnosed with grade II and III bilateral knee osteoarthritis using the radiological criteria of Kellgren & Lawrence. The subjects were randomized into three groups of ten patients each: one group was submitted to viscosupplementation and strength training (VST), another was

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Negrete, Rodney, and Jay Brophy. "The Relationship between Isokinetic Open and Closed Chain Lower Extremity Strength and Functional Performance." Journal of Sport Rehabilitation 9, no. 1 (2000): 46–61. http://dx.doi.org/10.1123/jsr.9.1.46.

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Objectives:To determine (1) correlations between isokinetic lower extremity strength and functional performance and (2) correlations among different modes of isokinetic testing.Design and Setting:A correlational design with 6 measures. A series of strength, power, and agility tests was performed at a hospital-based outpatient physical therapy clinic.Participants:A volunteer sample of 29 male and 31 female, college-age subjects participated.Measurements:All subjects were tested in the following isokinetic tests: reciprocal leg press, single-leg squat, and knee extension. Performance tests inclu

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Saral, İlknur, Serkan Sürücü, Esra Tekeci, Mehmet Ağırman, Mahir Mahiroğulları, and Engin Çakar. "Can isokinetic test be a supportive tool for unilateral knee arthroplasty decision?" Turkish Journal of Physical Medicine and Rehabilitation 1, no. 1 (2023): 105–10. http://dx.doi.org/10.5606/tftrd.2023.12374.

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Objectives: This study analyzed whether the isokinetic muscle strength of bilateral knee osteoarthritis patients undergoing unilateral total knee arthroplasty (TKA) is a predictor for prior surgery side. Patients and methods: In the prospective study conducted between April 2021 and December 2021, 58 knees of 29 unilateral TKA candidates (6 males, 23 females; mean age: 66.7±7.4 years; range, 53 to 81 years) were enrolled. The patients were divided into surgical (n=29)and nonsurgical (n=29) groups. The knees of patients with bilateral knee osteoarthritis (Stage III or IV) according to the Kellg

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Hong, Jae-Soo, Jeong-Bae Ko, Myeong-Min Ju, Byoung-Kwon Lee, Dae-Sung Park, and Su-Ha Lee. "The Reliability and Validity of an Isometric Knee Strength Measurement Device in Older Adult Individuals." Sensors 25, no. 10 (2025): 2981. https://doi.org/10.3390/s25102981.

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This study aims to evaluate the reliability and validity of the Leg Strength Analyzer (IB-LS) in assessing isometric knee flexion and extension strength in elderly adults, compare its performance with that of the CSMI dynamometer, and examine its agreement with isokinetic knee strength measurements. A total of 21 elderly participants (mean age: 65.10 ± 4.56 years) were recruited. Participants underwent knee flexion and extension strength assessments using both the IB-LS and CSMI devices, with isokinetic strength at 60°/s measured in a follow-up session at least one day later. The IB-LS demonst

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González-Ravé, José M., Daniel Juárez, Jacobo A. Rubio-Arias, Vicente J. Clemente-Suarez, María A. Martinez-Valencia, and Javier Abian-Vicen. "Isokinetic Leg Strength and Power in Elite Handball Players." Journal of Human Kinetics 41, no. 1 (2014): 227–33. http://dx.doi.org/10.2478/hukin-2014-0050.

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AbstractIsokinetic strength evaluation of the knee flexion and extension in concentric mode of contraction is an important part of the comprehensive evaluation of athletes. The aims of this study were to evaluate the isokinetic knee peak torque in both the extension and flexion movement in the dominant and non-dominant leg, and the relationship with jumping performance. Twelve elite male handball players from the top Spanish handball division voluntary participated in the study (age 27.68 ± 4.12 years; body mass 92.89 ± 12.34 kg; body height 1.90 ± 0.05 m). The knee extensor and flexor muscle

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Weaver, Adam, Dylan Roman, Maua Mosha, and Nicholas Giampetruzzi. "EARLY STRENGTH TESTING AFTER ACL RECONSTRUCTION IMPACTS ISOKINETIC STRENGTH PERFORMANCE AT TIME OF RETURN TO SPORT." Orthopaedic Journal of Sports Medicine 9, no. 7_suppl3 (2021): 2325967121S0011. http://dx.doi.org/10.1177/2325967121s00119.

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Background: The standard of care in ACL reconstruction (ACLR) typically involves standardized strength testing at 6 months or later to assess a patient’s readiness to return to play (RTP) using isokinetic and isometric testing, and functional strength testing. Recent literature suggests that isokinetic knee extension strength should demonstrate 89% limb symmetry index (LSI) or greater prior to returning to sport. However, there is little known on the effects of strength testing early in the rehabilitation process and the relationship to strength test performance at time of RTP. Purpose: The pu

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Herbawi, Fahed, Mario Lozano-Lozano, Maria Lopez-Garzon, et al. "A Systematic Review and Meta-Analysis of Strength Recovery Measured by Isokinetic Dynamometer Technology after Anterior Cruciate Ligament Reconstruction Using Quadriceps Tendon Autografts vs. Hamstring Tendon Autografts or Patellar Tendon Autografts." International Journal of Environmental Research and Public Health 19, no. 11 (2022): 6764. http://dx.doi.org/10.3390/ijerph19116764.

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Background: This systematic review and meta-analysis compared the isokinetic strength of the muscular knee joint between quadriceps tendon autografts (QTAs) and hamstring tendon autografts (HTAs) or patellar tendon autografts (PTAs) after anterior cruciate ligament (ACL) reconstruction by determining the isokinetic angular velocity and follow-up time points. The functional outcomes and knee stability at the same time points were also compared using isokinetic technology. Methods: Two independent reviewers searched the Medline (via PubMed search engine), Scopus, Web of Science and Cochrane Libr

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Şekir, Ufuk, Uğur Can Yalaki, and Bedrettin Akova. "Rectus femoris muscle thickness and cross-sectional area on ultrasonography may predict isometric and isokinetic knee extension strength: A cross-sectional study." Turkish Journal of Sports Medicine 57, no. 1 (2021): 21–30. http://dx.doi.org/10.47447/tjsm.0585.

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Objective: To examine the relationship between knee extensor strength and quadriceps muscle architecture evaluated with ultrasonography during relaxed and contracted situations. Materials and Methods: A total of 40 healthy participants (age range 18-40), doing sports at a recreational level were included. Pennation angle, muscle thickness, and cross-sectional area of the vastus medialis, vastus lateralis, and rectus femoris muscles were measured firstly during rest while participants are sitting on an isokinetic dynamometer with their knees at 0° and 60° of flexion. Thereafter, ultrasound eval

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Klingenstierna, U., P. Renström, G. Grimby, and B. Morelli. "Isokinetic strength training in below-knee amputees." Journal of Rehabilitation Medicine 22, no. 1 (1989): 39–43. http://dx.doi.org/10.2340/1650198419903943.

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Eight below-knee amputees performed isokinetic training of knee extensor- and knee-flexor muscles for a period of 8-12 weeks at angular velocities of 60 degrees/s, 180 degrees/s and 240 degrees/s. Before and after training isokinetic and isometric knee extensor/flexor strength was measured. Muscle biopsies were taken from the vastus lateralis and the cross-sectional area of the thigh muscles was measured with computerized tomography. Peak torque of the amputated leg increased significantly in all knee-extension tests and in knee-flexion at 180 degrees/s, and in the non-amputated leg in extensi

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Klingenstierna, U., P. Renström, G. Grimby, and B. Morelli. "Isokinetic strength training in below-knee amputees." Journal of Rehabilitation Medicine 22, no. 1 (2020): 39–43. http://dx.doi.org/10.2340/1650197790223943.

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Eight below-knee amputees performed isokinetic training of knee extensor- and knee-flexor muscles for a period of 8-12 weeks at angular velocities of 60 degrees/s, 180 degrees/s and 240 degrees/s. Before and after training isokinetic and isometric knee extensor/flexor strength was measured. Muscle biopsies were taken from the vastus lateralis and the cross-sectional area of the thigh muscles was measured with computerized tomography. Peak torque of the amputated leg increased significantly in all knee-extension tests and in knee-flexion at 180 degrees/s, and in the non-amputated leg in extensi

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Kafkas, A., M. E. Kafkas, and S. Savaş. "Effect of long-term training adaptation on isokinetic strength in college male volleyball players." Physical education of students 23, no. 5 (2019): 236–41. http://dx.doi.org/10.15561/20755279.2019.0504.

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Background and Study Aim: Most of this study focused on endurance, power, and anthropometric measurements but no research declared isokinetic strength changes during two years. The purpose of this study was to assess the effect of resistance exercises on two seasonal alters in isokinetic strength of knee muscles at different angular velocities, in college volleyball players. Material and Methods: Thirteen college volleyball players, (age: 21.75 years, body mass: 78.60 kg, and height: 187.0 cm) participated in the study. All college volleyball players take part in the two-year (8 month each yea

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Jung, Se-Han, Chong Hyuk Choi, Sung-Hwan Kim, et al. "Sequential Comparison of Knee Muscle Strength after Anterior Cruciate Ligament Reconstruction between Hamstring Autograft and Tibialis Anterior Allograft: Propensity Score Matched Pair Analysis." Diagnostics 14, no. 14 (2024): 1478. http://dx.doi.org/10.3390/diagnostics14141478.

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Among the graft options for anterior cruciate ligament reconstruction (ACLR), hamstring autografts are widely regarded as the preferred choice for primary ACLR among orthopedic surgeons worldwide. However, concerns persist regarding postoperative knee flexor weakness. We aimed to compare knee extensor and flexor strengths between hamstring autograft and tibialis anterior allograft groups in ACLR patients, who were propensity score-matched based on baseline characteristics. A retrospective analysis included 58 matched pairs who underwent isokinetic strength tests at 6 and 12 months post operati

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Eniseler, Niyazi, Çağatay Şahan, Hikmet Vurgun, and Hasan Mavi. "Isokinetic Strength Responses to Season-long Training and Competition in Turkish Elite Soccer Players." Journal of Human Kinetics 31, no. 1 (2012): 159–68. http://dx.doi.org/10.2478/v10078-012-0017-5.

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Isokinetic Strength Responses to Season-long Training and Competition in Turkish Elite Soccer PlayersThere are not enough studies that describe the isokinetic strength of professional soccer players at high angular velocities. The purpose of this study was to evaluate the seasonal changes in isokinetic strength of Turkish professional soccer players (n=14) over the course of a 24-week soccer season. The isokinetic strength of players who underwent usual soccer training and weekly competition throughout the soccer season was assessed by means of the Biodex System 3 dynamometer with the knee att

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Collado-Mateo, Daniel, Francisco Javier Dominguez-Muñoz, Zelinda Charrua, et al. "Isokinetic Strength in Peritoneal Dialysis Patients: A Reliability Study." Applied Sciences 9, no. 17 (2019): 3542. http://dx.doi.org/10.3390/app9173542.

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Although there are studies assessing the effects of interventions on the knee strength of patients undergoing dialysis, there are no previous studies investigating the test–retest reliability of isokinetic measures in people undergoing peritoneal dialysis. The objective of this study was to determine the relative and absolute reliability of peak torque and work measurements for isokinetic concentric knee and elbow extension and flexion in peritoneal dialysis patients. Thirty-one patients undergoing peritoneal dialysis (19 males) participated in the current study. All isokinetic tests were perf

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van der Woude, Danny R., Tim Takken, Thijs Ruyten, et al. "Feasibility and Reproducibility of Isokinetic Dynamometry in Children with Neuromuscular Diseases." Journal of Clinical Medicine 13, no. 17 (2024): 5285. http://dx.doi.org/10.3390/jcm13175285.

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Background/Objectives: High-precision measurement tools are needed to measure relevant changes in strength and power in children with neuromuscular diseases. The aim of this study was to determine the feasibility (i), reproducibility (ii), and validity (iii) of isokinetic dynamometry in this population. Methods: Isometric and isokinetic knee and elbow flexion and extension were measured twice on the same day. Feasibility was based on completion rate and acceptability. Acceptability was measured with a 100 mm visual analog scale. We measured reproducibility as the intraclass correlation coeffic

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Didehdar, Daryoush, and Ameneh Kharazinejad. "The Association Between Sprint Speed Test and Isokinetic Knee Strength in Healthy Male Volleyball Players." International Journal of Sport Studies for Health 4, no. 2 (2021): 59–63. http://dx.doi.org/10.61838/kman.intjssh.4.2.8.

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Background: Volleyball is a sport with technical elements and explosive power. Objectives: This study investigates the relationship between sprint speed and isokinetic knee strength applied at different angular velocities in male volleyball players. Methods: This study was conducted on 15 volunteer male volleyball players (age; 17 - 25 years, height; 1.75 + 0.12 m). Isomedx 2002 isokinetic dynamometer is employed to measure the isokinetic strength, and a 20 m sprint test is conducted to measure the speed. In measuring knee flexion and isokinetic extension strength, quadriceps and hamstring con

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de Lira, Claudio, Valentine Vargas, Wallace Silva, André Bachi, Rodrigo Vancini, and Marilia Andrade. "Relative Strength, but Not Absolute Muscle Strength, Is Higher in Exercising Compared to Non-Exercising Older Women." Sports 7, no. 1 (2019): 19. http://dx.doi.org/10.3390/sports7010019.

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Exercise has been suggested for older adults. However, there is no consensus whether exercising older adults present better strength levels and body composition indexes compared with inactive counterparts. Our aim was to compare absolute and relative isokinetic muscular knee strength and body composition between exercising and non-exercising older women. Exercising (n = 20) and non-exercising (n = 21) groups were evaluated for body mass index (BMI), body composition, and isokinetic muscular knee strength. BMI (p = 0.005), total body mass (p = 0.01), fat mass (p = 0.01), and fat mass percentage

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Pepe, Murad, Emre Calisal, Onur Kocadal, Eren Bicer, Suhan Taskin, and Cem Nuri Aktekin. "The Role of Surgical Closure Position in Total Knee Arthroplasty: Flexion versus Extension—A Randomized Prospective Study." Journal of Knee Surgery 32, no. 07 (2018): 624–29. http://dx.doi.org/10.1055/s-0038-1666865.

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AbstractWe aimed to investigate the effect of the knee position during the surgical closure on isokinetic muscle strength, clinical score, and range of motion in total knee arthroplasty. Seventy-five eligible patients were enrolled in the study and randomly divided into two groups; wound closure was performed with the knee flexed at 90° in group 1 and knee extended in group 2. All the surgeries were performed by the same surgeon and by the same prosthesis type. All the patients received the same rehabilitation program postoperatively. The primary outcomes were the knee flexion degrees and the

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Malý, Tomáš, František Zahálka, Lucia Malá, and Jaroslav Teplan. "Profil izokinetickej sily extenzorov a flexorov kolena u mladých futbalových hráčov." Studia sportiva 6, no. 1 (2012): 53–60. http://dx.doi.org/10.5817/sts2012-1-6.

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Th e aim of the study was to present isokinetic strength profi le of knee fl exors and extensors during concentric contraction in young soccer players. Particularly in knee fl exors was evaluated also strength during eccentric contraction. Research group was state from young soccer players U17 category (n=19, age=16,4±0,3 years). All of them are the participant of highest junior soccer league. Isokinetic strength was evaluated by isokinetic dynamometr Cybex Humac Norm in following angular velocities: 30, 60 and 120°/s in eccentric contraction and 60, 180, 240 and 300 °/s in concentric contract

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Paulus, Julien, Jerome Pauls, Laurent Radizzi, et al. "Knee strength measurement: Can we switch between isokinetic dynamometers?" Isokinetics and Exercise Science 29, no. 3 (2021): 247–68. http://dx.doi.org/10.3233/ies-193193.

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BACKGROUND: Isokinetic evaluation is considered the gold standard in muscle strength measurement due to its sensitivity, intra-dynamometer reproducibility and usefulness in the injury prevention screening and follow up of subjects with musculoskeletal pathologies, neurological disease or after surgical operation. However, can one switch among different isokinetic dynamometers for the purpose of knee muscles evaluation? OBJECTIVES: To comprehensively evaluate the compatibility of the isokinetic short concentric and eccentric strength evaluation protocol and of the fatigability resistance evalua

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Brown, Scott R., Matt Brughelli, Peter C. Griffiths, and John B. Cronin. "Lower-Extremity Isokinetic Strength Profiling in Professional Rugby League and Rugby Union." International Journal of Sports Physiology and Performance 9, no. 2 (2014): 358–61. http://dx.doi.org/10.1123/ijspp.2013-0129.

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Purpose:While several studies have documented isokinetic knee strength in junior and senior rugby league players, investigations of isokinetic knee and hip strength in professional rugby union players are limited. The purpose of this study was to provide lower-extremity strength profiles and compare isokinetic knee and hip strength of professional rugby league and rugby union players.Participants:32 professional rugby league and 25 professional rugby union players.Methods:Cross-sectional analysis. Isokinetic dynamometry was used to evaluate peak torque and strength ratios of the dominant and n

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Krishna, Sai Aditya, Thiagarjan Keddin Alwar, Sandile Sibeko, Shivani Ranjit, and Arumugam Sivaraman. "Plyometric-based Training for Isokinetic Knee Strength and Jump Performance in Cricket Fast Bowlers." International Journal of Sports Medicine 40, no. 11 (2019): 704–10. http://dx.doi.org/10.1055/a-0970-5564.

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AbstractCompetitive cricket demands a high level of performance from fast bowlers. Ground reaction forces during the landing phase pose a risk for lower limb and lumbar spine injury. Good dynamic knee strength allows the knee to flex to absorb these forces and extend prior to ball release for maximum efficiency. Plyometric training has been shown to improve dynamic strength. There is a lack of literature on this subject for cricket. This study evaluated the effect of a combined plyometric and strength training program on isokinetic knee strength of fast bowlers. Forty-two professional fast bow

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McKay, Damien, Genevieve Ostring, Carolyn Broderick, Jeffrey Chaitow, and Davinder Singh-Grewal. "A Feasibility Study of the Effect of Intra-Articular Corticosteroid Injection on Isokinetic Muscle Strength in Children With Juvenile Idiopathic Arthritis." Pediatric Exercise Science 25, no. 2 (2013): 221–37. http://dx.doi.org/10.1123/pes.25.2.221.

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This study assessed the magnitude of changes in isokinetic muscle strength in children with juvenile idiopathic arthritis (JIA) before and after treatment with intra-articular corticosteroid injection and assessed the feasibility of a larger study of the same effect. Isokinetic dynamometry was used to measure peak knee extension and flexion torque in 12 children before and after treatment for unilateral knee arthritis. Extensor and flexor strength was reduced on the affected side before treatment (-0.56Nm/kg, p = .004 and −0.24Nm/kg, p = .02 respectively). Increases in extensor strength were o

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Fry, Andrew C., William J. Kraemer, James M. Lynch, and Jason M. Barnes. "Overload Injury of the Knees with Resistance-Exercise Overtraining: A Case Study." Journal of Sport Rehabilitation 10, no. 1 (2001): 57–66. http://dx.doi.org/10.1123/jsr.10.1.57.

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Objective:To report a joint-centered mechanism of performance decrements caused by overtraining.Design:Case study.Setting:Laboratory-induced overtraining.Participants:Eleven weight-trained men, 1 (subject A) with overload injury of the knees.Intervention:High-intensity squat resistance-exercise overtraining for 2 weeks.Outcome Measures:1RM lower-body strength, isokinetic and isometric knee-extension strength, and stimulated isometric knee-extension strength.Results:Subject A’s 1RM strength decreased 40.3 kg, and the other overtrained subjects (OT) exhibited significant (P< .05) 1RM decremen

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Oxendale, Chelsea, and Grace Smith. "Association between 2D landing biomechanics, isokinetic muscle strength and asymmetry in females using novel, task specific metrics based on ACL injury mechanisms." PLOS One 20, no. 7 (2025): e0326882. https://doi.org/10.1371/journal.pone.0326882.

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This study investigated the relationship between isokinetic muscle strength metrics, landing biomechanics, and their asymmetries, in females. Twenty-three female team sport athletes completed unilateral forward drop landings, and isokinetic muscle strength assessment of the knee extensors and flexors, on both limbs. Discrete two-dimensional kinematics of the trunk, hip, knee, and ankle in the sagittal and frontal plane and peak GRF were recorded during the drop landings. Novel, task-specific isokinetic strength metrics related to the landing task, such as peak concentric and eccentric torque,

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Aktuğ, Zait Burak, Ali Kerim Yılmaz, Serkan İbiş, Hasan Aka, Cengiz Akarçeşme, and Tamer Sökmen. "The Effect of 8-Week Nordic Hamstring Exercise on Hamstring Quadriceps Ratio and Hamstring Muscle Strength." World Journal of Education 8, no. 3 (2018): 162. http://dx.doi.org/10.5430/wje.v8n3p162.

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The aim of the study is to investigate the effect of 8-week Nordic Hamstring (NH) exercise on hamstring/quadricepsratio (H/Q) and hamstring muscle strength. 22 amateur soccer players participated in the study. Soccer players weredivided into two groups: the control group (CG) (n = 11) who only practiced soccer training and the NordicHamstring exercise group (NHEG) (n = 11) who performed NH in addition to soccer training. The isokinetic kneemuscle strength of the soccer player was measured twice at the beginning of the study and after the 8 week NHexercise. An isokinetic dynamometer was used to

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Dauty, Marc, Pierre Menu, Olivier Mesland, Bastien Louguet, and Alban Fouasson-Chailloux. "Impact of Patellar Tendinopathy on Isokinetic Knee Strength and Jumps in Professional Basketball Players." Sensors 21, no. 13 (2021): 4259. http://dx.doi.org/10.3390/s21134259.

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Patellar tendinopathy is characterized by tendon pain which may reduce the level of performance. This study’s main aim was to compare isokinetic knee strength and jump performances at the start of the sport season between players with patellar tendinopathy and those without. Secondary aims were to assess the relationship between knee strength and jump function. Sixty-two professional basketball players were enrolled (mean age: 25.0 ± 4.0). All players performed knee isokinetic measurements, single leg countermovement jumps, and one leg hop tests. Correlations between knee strength and jump per

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Lehnert, Michal, Petr Stastny, James J. Tufano, and Pavel Stolfa. "Changes in Isokinetic Muscle Strength in Adolescent Soccer Players after 10 Weeks of Pre-Season Training." Open Sports Sciences Journal 10, no. 1 (2017): 27–36. http://dx.doi.org/10.2174/1875399x01710010027.

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Background:During soccer-specific movements, the strength of knee extensors and flexors is of great importance and achieving certain strength ratios between the two has been identified as an important parameter for reducing the risk of soft tissue injuries around the knee.Objective:The aim of the study was to evaluate changes in isokinetic strength of the knee flexors and extensors and their strength ratios in elite adolescent soccer players.Methods:Before and after 10 weeks of standard pre-season soccer training with progressive eccentric hamstring exercises, the players (n=18; age 17.1±0.4 y

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Madsen, OR, and UB Lauridsen. "Knee extensor and flexor strength in elderly women after recent hip fracture: assessment by the Cybex 6000 dynamometer of intra-rater inter-test reliability." Journal of Rehabilitation Medicine 27, no. 4 (1995): 219–26. http://dx.doi.org/10.2340/165019771995219226.

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The reliability of knee extensor and flexor strength measurements was assessed in 20 women (aged 68-88 years) who had experienced a hip fracture two to four weeks before but who were otherwise healthy. Using the Cybex 6000 isokinetic dynamometer, isokinetic knee extensor and flexor strength (peak torque, total work and power) at 30 and 120 degree/second and isometric knee extensor and flexor strength (peak torque) were measured by the same examiner in both legs, successively, on four separate days within one week. Compared with the non-involved leg, the median reduction in peak extensor and fl

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Madsen, OR, and UB Lauridsen. "Knee extensor and flexor strength in elderly women after recent hip fracture: assessment by the Cybex 6000 dynamometer of intra-rater inter-test reliability." Journal of Rehabilitation Medicine 27, no. 4 (2020): 219–26. http://dx.doi.org/10.2340/165019779527219226.

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The reliability of knee extensor and flexor strength measurements was assessed in 20 women (aged 68-88 years) who had experienced a hip fracture two to four weeks before but who were otherwise healthy. Using the Cybex 6000 isokinetic dynamometer, isokinetic knee extensor and flexor strength (peak torque, total work and power) at 30 and 120 degree/second and isometric knee extensor and flexor strength (peak torque) were measured by the same examiner in both legs, successively, on four separate days within one week. Compared with the non-involved leg, the median reduction in peak extensor and fl

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Mallada, Néstor Pérez, María Jesús Martínez Beltrán, María Ana Saenz Nuño, et al. "Biomechanical Factors Predisposing to Knee Injuries in Junior Female Basketball Players." Sports 12, no. 2 (2024): 60. http://dx.doi.org/10.3390/sports12020060.

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This cross-sectional observational study aims to determine isokinetic normality data at different speeds, and isometric data of ankle and knee joints, in healthy basketball players aged 15–16 years old. The participants were recruited through non-probabilistic convenience sampling. Sociodemographic, anthropometric, and biomechanical variables were collected. The study involved 42 participants. Right-leg dominance was higher in women (85.7%) than in men (78.6%). Men had a higher weight, height, and body mass index compared to women. Statistically significant differences were observed between se

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Cho, Yeong-Hyun, Ji-Hee Park, Ji-Eun Kim, Joo-In Yu, Young-Pyo Kim, and Tae-Beom Seo. "Comparative study on differences of the maximal strength, isokinetic knee and trunk functions and anaerobic capacity according to the position in college and professional rugby players." Korean Journal of Sport Science 30, no. 2 (2019): 441–48. http://dx.doi.org/10.24985/kjss.2019.30.2.441.

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Purpose The purpose of this study is to compare the maximal strength, isokinetic muscle function and anaerobic capacity according to the position of college and professional rugby players. Methods Subjects for this study were 54 athletes and randomly divided into 4 groups: the forwards group in college rugby players (FCRP, n = 10), backs group in college rugby players (BCRP, n = 16), forwards group in professional rugby players (FPRP, n = 16), and backs group in professional rugby players (BPRP, n = 12). Physical fitness was consisted of squat, bench press, bilateral grip strength. Isokinetic

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Bascevan, Sasa, Barbara Gilic, Mirela Sunda, Marijana Geets Kesic, and Petra Zaletel. "Isokinetic Knee Muscle Strength Parameters and Anthropometric Indices in Athletes with and without Hyperextended Knees." Medicina 60, no. 3 (2024): 367. http://dx.doi.org/10.3390/medicina60030367.

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Background and Objectives: Hypermobility has been linked to decreased knee performance, including isokinetic and isometric knee strength. This study aimed to determine whether athletes with and without knee hyperextension have different hamstring-to-quadriceps strength (H/Q) ratios and to investigate the associations between knee hyperextension indices and H/Q ratios and anthropometric characteristics. Materials and Methods: The sample consisted of 47 healthy male athletes without knee injuries aged 23.48 ± 3.54 years. The variables included the degree of knee hypermobility, isokinetic paramet

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Kale, M., and B. Gurol. "Effects of electromyostimulation training on jumping and muscle strength in football players." Physical education of students 23, no. 5 (2019): 242–48. http://dx.doi.org/10.15561/20755279.2019.0505.

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Purpose: Electromyostimulation is a popular training to increase muscle strength during the last years. The aim of this study was to investigate effects of electromyostimulation training on jumping and muscle strength in football players. Material: Volunteered 23 football players between the ages of 18 to 24 were divided into experimental and control groups with simple random sampling. Both groups continued to regular training. Experimental group had additional electromyostimulation training for 6-week, 3-time a week, and 20min a day. Pre- and post-training squat and countermovement jumps, pea

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Kamffer, Lenthea, Henriette V. Hammill, Yolandi Willemse, and Mark Kramer. "Multidirectional Landing Kinetics, Stabilisation Times, and Associated Isokinetic Knee Torques of High-Level Female Netball Players." Applied Sciences 13, no. 3 (2023): 1261. http://dx.doi.org/10.3390/app13031261.

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Netball is a multidirectional sport afflicted by a relatively high proportion of lower-extremity injuries. The purpose of this study was to evaluate the relationships between multidirectional landing stabilisation times, unilateral landing kinetics, and isokinetic knee joint torques in elite female netball players. A total of 15 players volunteered for the study (age: 20.80 ± 1.42 years; height: 1.75 ± 0.06 m; body mass: 71.69 ± 13.58 kg). All players completed a minimum of 25 multidirectional, unilateral landing tasks, as well as isokinetic dynamometry, to evaluate both concentric and eccentr

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