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isokinetic muscle strength

Ethan C Hill, Terry J Housh, Joshua L Keller, Cory M Smith, Richard J Schmidt, Glen O Johnson
OBJECTIVES: The purpose of this study was to examine the effects of exercise intensity and strength on sex-related differences in eccentric peak torque (PT), muscle blood flow, and neuromuscular responses following fatiguing, submaximal forearm flexion eccentric protocols. METHODS: Thirty-six subjects were stratified by sex and strength into 4 equal groups and randomly performed fatiguing eccentric, isokinetic (180°·s-1 ), forearm flexion protocols at 40% or 80% of eccentric PT...
December 1, 2018: Journal of Musculoskeletal & Neuronal Interactions
S Kierkegaard, I Mechlenburg, B Lund, L Rømer, K Søballe, U Dalgas
OBJECTIVES: Little is known about hip function after hip arthroscopic surgery in patients with femoroacetabular impingement syndrome. Hence, the aim of the study was (1) to investigate changes in hip muscle strength from before to one year after hip arthroscopic surgery, (2) to compare patients with a reference group. DESIGN: Cohort study with a cross-sectional comparison. METHODS: Before and after hip arthroscopic surgery, patients underwent hip muscle strength testing of their hip flexors and extensors during concentric, isometric and eccentric contraction in an isokinetic dynamometer...
October 17, 2018: Journal of Science and Medicine in Sport
Lars K Markvardsen, Anne-Kathrine R Carstens, Kirsten L Knak, Kristian Overgaard, John Vissing, Henning Andersen
BACKGROUND: We have previously shown that patients with chronic inflammatory demyelinating polyneuropathy (CIDP) improve muscle strength and aerobic capacity after resistance and aerobic exercise. OBJECTIVE: The purpose of this study was to determine if muscle strength and aerobic capacity are preserved one year after discontinuation of regular exercise. METHODS: All patients in the previous exercise study were eligible for a one-year follow-up with measurement of combined isokinetic muscle strength (cIKS) by dynamometry and maximal oxygen consumption velocity (VO2-max)...
November 27, 2018: Journal of Neuromuscular Diseases
James Louis Nuzzo, Janet L Taylor, Simon C Gandevia
Muscle strength - the maximal force generating capacity of a muscle or group of muscles - is regularly assessed in physiological experiments and clinical trials. An understanding of the expected variation in strength and the factors that contribute to this variation is important when designing experiments, describing methodologies, interpreting results, and attempting to replicate methods of others and reproduce their findings. In this review (Cores of Reproducibility in Physiology), we report on the intra- and inter-rater reliability of tests of upper- and lower-limb muscle strength and voluntary activation in humans...
November 29, 2018: Journal of Applied Physiology
Ioannis Tasiopoulos, Pantelis T Nikolaidis, Alexandra Tripolitsioti, Apostolos Stergioulas, Thomas Rosemann, Beat Knechtle
Aim: The kinetic chain of the punch of boxers is characterized by the contribution of the shoulder; however, the isokinetic muscle strength of shoulder's rotators muscles has not been well studied so far, especially with regards to performance. Therefore, the aim of the present study was (a) to profile the isokinetic muscle strength of rotators of the glenohumeral joint, bilateral (BL), unilateral (UL) and functional ratios in amateur boxers, and (b) to examine the variation of these muscle strength characteristics by performance level...
2018: Frontiers in Physiology
Maria Tsekoura, Evdokia Billis, Elias Tsepis, Zacharias Dimitriadis, Charalampos Matzaroglou, Minos Tyllianakis, Elias Panagiotopoulos, John Gliatis
Physical exercise is effective for sarcopenic elderly but evidence for the most effective mode of exercise is conflicting. The objective of this study was to investigate the effects of a three-month group-based versus home-based exercise program on muscular, functional/physical performance and quality of life (QoL) across elderly with sarcopenia. 54 elderly (47 women, 7 men aged 72.87 ± 7 years) were randomly assigned to one of three interventions: supervised group ( n = 18), individualized home-based exercise ( n = 18) and control group ( n = 18)...
November 26, 2018: Journal of Clinical Medicine
Sarah Souza Pontes, Ana Louise Reis de Carvalho, Katna de Oliveira Almeida, Murilo Pires Neves, Ingara Fernanda Silva Ribeiro Schindler, Iura Gonzalez Nogueira Alves, Fabio Luciano Arcanjo, Mansueto Gomes-Neto
OBJECTIVE: To investigate whether isokinetic muscle strengthening improves muscle strength, mobility, and gait in post-stroke patients. METHODS: We searched for randomized controlled trials at PubMed/Medline, SciELO, PEDro, and Cochrane Central Register of Controlled Trials, from the earliest date available to June 2018. Randomized controlled trials that examined the effects of isokinetic muscle strengthening versus other rehabilitation interventions or control in post-stroke patients were included...
November 28, 2018: Clinical Rehabilitation
Robert Prill, Sven Michel, Robert Schulz, Hans-Joachim Appell Coriolano
The purpose of this study was to investigate if there are still deficits in muscle mass or strength capabilities in elite judo athletes with a history of anterior cruciate ligament reconstruction (ACLR) after their return to the sport. Therefore, bioimpedance analysis, 3D-laser thigh circumference measurement and isokinetic dynamometry in a closed kinetic chain were used. The side-to-side differences were investigated in a group of judo athletes 5 years after ACLR (n=17) and compared with a group of healthy judo athletes (n=27)...
November 27, 2018: International Journal of Sports Medicine
Lucia Feltroni, Serena Monteleone, Lucia Petrucci, Ettore Carlisi, Bruno Mazzacane, Marco Schieppati, Elena Dalla Toffola
OBJECTIVES: Several studies have investigated the effects of focal vibration on muscle strength. Non-univocal results have been found. The aim of this study was to evaluate the effect of prolonged focal vibratory stimulation on quadriceps muscle strength at two different frequencies (80 and 300 Hz). The evaluation of muscle strength was performed at different intervals of time after the end of the vibratory stimulation in order to quantify the long-term effects and their trends over time...
June 2018: Giornale Italiano di Medicina del Lavoro Ed Ergonomia
Guri Ranum Ekås, Håvard Moksnes, Hege Grindem, May Arna Risberg, Lars Engebretsen
BACKGROUND: There is no consensus regarding the best treatment approach for skeletally immature children with anterior cruciate ligament (ACL) injuries. High-quality studies with long-term follow-up are lacking, and evidence to support decision making is limited. PURPOSE: To evaluate functional and patient-reported outcome, surgical history, and complications among young adults who sustained an ACL injury before the age of 13 years and were treated with active rehabilitation and the option of delayed ACL reconstruction if needed...
November 26, 2018: American Journal of Sports Medicine
Kristine Risum, Elisabeth Edvardsen, Kristin Godang, Anne M Selvaag, Bjørge H Hansen, Øyvind Molberg, Jens Bollerslev, Inger Holm, Hanne Dagfinrud, Helga Sanner
OBJECTIVE: To perform a comprehensive evaluation of and identify correlates for physical fitness in consecutive patients with juvenile idiopathic arthritis (JIA) diagnosed in the era of biologics; also to compare the results with those obtained in healthy controls. METHODS: The study cohort included 60 JIA patients (50 girls) aged 10-16 years and 60 age- and sex-matched controls. The JIA group included 30 patients with persistent oligo JIA and 30 patients with extended oligo- or poly-articular disease...
November 26, 2018: Arthritis Care & Research
Emily Frith, Paul D Loprinzi
Background: We evaluated the association between lower extremity muscular strength and cognition among older adults in the United States. Methods: Data from the 1999-2002 National Health and Nutrition Examination Survey was used to identify 1508 older adults, between 60-85 years. Muscle strengthening activities were assessed via self-report. Participation in physical activity was determined from self-report data. The DSST was used to assess participant executive cognitive functioning tasks of pairing and free recall...
July 2018: Journal of Lifestyle Medicine
Anna Książek, Wioletta Dziubek, Jadwiga Pietraszewska, Małgorzata Słowińska-Lisowska
There is a growing body of evidence for a role of vitamin D in muscle function and for its influence on athletic performance, injury profile and recovery in well-trained athletes. The aim of our study was to assess the relationship between 25(OH)D levels and hand grip strength, lower limb isokinetic strength and muscle power in elite judoists. We enrolled 25 Polish elite judoists. The mean age was 21.9±9.8 years, the mean height was 179.2±6.6 cm, the mean body mass was 79.1±8.7 kg, and the mean career duration was 11...
June 2018: Biology of Sport
Steffen Mueller, Josefine Stoll, Michael Cassel, Tilman Enge, Juliane Mueller, Frank Mayer
OBJECTIVE: To evaluate trunk peak torque and muscle activation pattern during isokinetic and sudden trunk loading (STL) between adolescent athletes with/without back pain. METHODS: Nine adolescent athletes with back pain (BP) (m/f 2/7; 15.6 ± 1.2 y; 177 ± 9 cm; 67 ± 13 kg; 22.5 ± 9.8 h/week) and nine matched controls (m/f 2/7; 15.7 ± 1.4 y; 177 ± 12 cm; 65 ± 9 kg; 16.5 ± 8.0 h/week training) were included. Trunk strength in rotation and flexion/extension was assessed...
November 8, 2018: Journal of Back and Musculoskeletal Rehabilitation
Wolfgang Kemmler, Simon von Stengel, Daniel Schoene, Matthias Kohl
Age-related loss of muscle mass and function, also called sarcopenia, was recently added to the ICD-10 as an independent condition. However, declines in muscle mass and function are inevitable during the adulthood aging process. Concerning muscle strength as a crucial aspect of muscle function, maximum knee extension strength might be the most important physical parameter for independent living in the community. In this study, we aimed to determine the age-related decline in maximum isokinetic knee extension (MIES) and flexion strength (MIFS) in adult men...
2018: Frontiers in Physiology
Gamze Kus, Ipek Yeldan
People with knee osteoarthritis have atrophy of the muscles surrounding the knee joint. Therefore, exercise programs primarily have been focused on the strengthening of quadriceps femoris muscle (QFM). Primary aim of this systematic review was to determine which exercise increases strength of the QFM and describe the details of the training programs. Secondary aim was to determine effectiveness of strengthening of the QFM alone on pain and dysfunction in patient with knee osteoarthritis. PubMed, PEDro, and Cochrane were searched...
November 15, 2018: Rheumatology International
Nicolas Olivier, Frédéric N Daussin
Swimming and throwing are involved in water-polo player performance. These movements have a common biomechanical basis in the use of the internal shoulder rotation and adductor muscles. The aim of the study was to evaluate the relationship between shoulder isokinetic evaluation and throwing velocity as well as swimming performance in female water-polo players. Fifteen high level water-polo players completed two isokinetic shoulder evaluations to determine peak torque of shoulder rotators of the dominant shoulder (concentric and eccentric movements at an angular velocity of 60°·s-1 and concentric movements at an angular velocity of 240°·s-1) and shoulder extensors of both arms (concentric movements at an angular velocity of 60°·s-1 and 240°·s-1)...
September 2018: Journal of Human Kinetics
Jin Goo Kim, Yong Seuk Lee, Sang Jin Yang, Hyun Woo Lim, Kwan Jae Cho
The purposes of this study was to 1) compare the functional result and muscle strength between patients who underwent reconstruction by isolated posterior cruciate ligament (PCL) and combined PCLposeterolateral corner sling (PLCS) reconstruction. Nineteen (Group I: isolated PCL reconstruction) and 30 (Group II: combined PCL-PLCS reconstruction) were compared. The clinical results and isokinetic muscle strength were compared between groups. The clinical results were comparable between groups and posterior stability was not different between the two groups, either...
December 2017: Acta Orthopaedica Belgica
Takehiko Matsushita, Daisuke Araki, Tomoyuki Matsumoto, Takahiro Niikura, Ryosuke Kuroda
OBJECTIVE: Quadriceps dysfunction has been suggested as a complication after medial patellofemoral ligament (MPFL) reconstruction. The purpose of this study was to investigate changes in knee extensor strength before and after MPFL reconstruction. METHODS: Twenty patients who underwent MPFL reconstruction for unilateral recurrent patellar dislocation (18 females and 2 males; mean age 20.8 ± 7.6 years) were examined. The peak isometric torque at 60° and 90° of knee flexion and isokinetic knee extensor strength at speeds of 60°/s and 90°/s in operated and non-operated legs were measured using a dynamometer preoperatively and 6 months, 1 year, and 2 years postoperatively...
November 10, 2018: Physician and Sportsmedicine
Julien Esnault, Besma Missaoui, Samy Bendaya, Michele Mane, Bruno Eymard, Pascal Laforet, Tanya Stojkovic, Anthony Behin, Philippe Thoumie
Facioscapulohumeral muscular dystrophy type 1 is the third most common inherited myopathy. Its severity is proportionate to the loss of microsatellite D4Z4 repetitions, which are below 10. Patients suffer from weakness in facial muscles, shoulder girdles and ankle dorsiflexors. Trunk impairment is reported in few studies. To assess correlation between D4Z4 number of repetitions in facioscapulohumeral muscular dystrophy type 1 patients and trunk extensors and flexors isokinetic peak torque, 48 patients with southern Blot confirmed facioscapulohumeral muscular dystrophy type 1 were enrolled to perform clinical evaluation (Ricci's Clinical Severity Scoring, Berg Balance Scale, Functional Reach Test, timed up-and-go test, six-minute walk test, functional independence measure) and trunk isokinetic assessment...
September 27, 2018: Neuromuscular Disorders: NMD
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