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https://www.readbyqxmd.com/read/29341794/preseason-strength-assessment-of-the-rotator-muscles-and-shoulder-injury-in-handball-players
#1
Bénédicte Forthomme, Jean-Louis Croisier, François Delvaux, Jean-François Kaux, Jean-Michel Crielaard, Sophie Gleizes-Cervera
CONTEXT:   Few researchers have identified intrinsic risk factors for shoulder injury in team handball players by analyzing measurements of maximal isokinetic rotator muscle strength. OBJECTIVE:   To identify possible intrinsic risk factors for shoulder injury by analyzing measurements of maximal isokinetic rotator muscle strength. DESIGN:   Cross-sectional study. SETTING:   Male team handball senior divisions (the highest level) in France and Belgium...
January 17, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29338824/effects-of-preoperative-isokinetic-eccentric-training-and-whey-protein-isolate-supplement-on-quadriceps-strength-and-knee-function-in-patients-with-anterior-cruciate-ligament-rupture
#2
Xiao Yuan Zhang, Hong Shi Huang, Jie Yang, Yuan Yuan Yu, Dong Xia Zhang, Cui Qing Chang
Objective To explore the effect of preoperative isokinetic eccentric training with or not whey protein isolate supplement before operation on lower limb muscle strength and knee function in patients with anterior cruciate ligament (ACL) rupture. Methods A total of 22 male volunteers aged 18-40 years with ACL rupture were recruited in outpatient service. With randomized block design,subjects were randomly assigned to isokinetic eccentric training (IE) group and isokinetic eccentric training with whey protein isolate supplement (IE+WPI) group...
December 20, 2017: Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae
https://www.readbyqxmd.com/read/29334581/gender-and-muscle-specific-responses-during-fatiguing-exercise
#3
Ethan C Hill, Terry J Housh, Cory M Smith, Richard J Schmidt, Glen O Johnson
The purpose of the present investigation was to examine potential gender-related differences in electromyographic (EMG) and mechanomyographic (MMG) responses during submaximal, concentric, isokinetic, forearm flexion muscle contractions. Twelve men and twelve women performed concentric peak torque trials prior to (pretest) and following (posttest) a fatiguing exercise bout that consisted of 50 submaximal (65% of concentric peak torque), concentric, isokinetic (60°·s), forearm flexion muscle contractions. Surface EMG and MMG signals were simultaneously recorded from the biceps brachii and brachioradialis muscles...
January 12, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29332059/analysis-of-skeletal-muscle-performance-using-piezoelectric-film-sensors
#4
Anat Ratnovsky, Emanuel Kusayev, Sara Naftali
A flexible piezoelectric thin film sensor has been proposed recently in several studies for detection of muscle movements. The objective of this study was to investigate the ability of this sensor to assess skeletal muscle performance and fatigue under isokinetic contractions. Simultaneous noninvasive measurements of muscles activity were done using surface electromyography (EMG) electrodes and two thin film piezoelectric sensors. Measurements were taken from the biceps during slow and fast elbow flexion with and without strong grip, during different weight lifting and from the gastrocnemius during treadmill marching at speeds of 4 and of 10 kph...
January 5, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29331137/molecular-dynamics-based-enhanced-sampling-of-collective-variables-with-very-large-time-steps
#5
Pei-Yang Chen, Mark E Tuckerman
Enhanced sampling techniques that target a set of collective variables and that use molecular dynamics as the driving engine have seen widespread application in the computational molecular sciences as a means to explore the free-energy landscapes of complex systems. The use of molecular dynamics as the fundamental driver of the sampling requires the introduction of a time step whose magnitude is limited by the fastest motions in a system. While standard multiple time-stepping methods allow larger time steps to be employed for the slower and computationally more expensive forces, the maximum achievable increase in time step is limited by resonance phenomena, which inextricably couple fast and slow motions...
January 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29327824/are-there-bilateral-isokinetic-shoulder-rotator-differences-in-basketball-male-players
#6
Thierry Weissland, Maryne Cozette, Clare Doyle, Antoine Gabrion
BACKGROUND: The internal (IR) and external (ER) rotator shoulder strength are often assess in the upper limb sports to prevent a risk of injuries. The purpose of this comparative study was to measure the agonist/antagonist balance of shoulder strength and to determine whether significant differences exist between the dominant and nondominant sides in basketball players compared to a control groups. METHODS: During the championship, 23 elite male-basketball players (BB) and 23 healthy males (CG) were tested bilaterally on a Cybex Norm isokinetic dynamometer in a seated position with 45° shoulder abduction in the scapular plane at 60°...
January 10, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29326905/neuromuscular-features-in-sprinters-with-cerebral-palsy-case-studies-based-on-paralympic-classification
#7
Diego Antunes, Mateus Rossato, Rafael Lima Kons, Raphael Luiz Sakugawa, Gabriela Fischer
Despite the evolution of runner performance in athletes with cerebral palsy (CP), little is known about neuromuscular parameters of sprinters from different classes, especially related to power output, muscular imbalances and asymmetry indexes in lower limbs. The aim of this study was to assess muscle power, muscular imbalance and asymmetry in sprinters with CP. Four male sprinters with CP (age, 18 to 27 years; body mass, 58.5 to 72.8 kg; height, 161.5 to 174 cm) classified as T38, T37, T36, T35 according to International Paralympic Committee functional classification, performed vertical counter movement jump and squat jump on force plate and isokinetic torque evaluations in both limbs...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29326089/associations-between-markers-of-oxidative-stress-skeletal-muscle-mass-and-function-and-to-the-influence-of-resistance-exercise-training-in-older-adults
#8
Ciriaco Carru, Mariasole Da Boit, Panagiotis Paliogiannis, Angelo Zinellu, Salvatore Sotgia, Rachael Sibson, Judith R Meakin, Richard M Aspden, Arduino A Mangoni, Stuart R Gray
BACKGROUND: Oxidative stress (OS) negatively affects skeletal muscle homeostasis in experimental models of ageing. However, little is known about the associations between circulating OS markers and parameters of muscle mass and function, and their responses to exercise training, in humans. METHODS: Maximal voluntary contraction (MVC, primary outcome) and isokinetic torque of the knee extensors at 30° s-1 (MIT), muscle cross-sectional area (MCSA) and quality (MQ, secondary outcomes), and plasma concentrations of malondialdehyde (MDA, pro-OS), homocysteine (HCY, pro-OS), taurine (TAU, anti-OS), and protein sulphydryl groups (PSH, anti-OS) were measured in 27 healthy older males and 23 females at baseline and after an 18-week resistance exercise program, with or without a nutritional intervention (fish oil vs...
January 8, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29325839/the-effect-of-low-load-exercise-on-joint-pain-function-and-activities-of-daily-living-in-patients-with-knee-osteoarthritis
#9
Jason Peeler, Jacquie Ripat
BACKGROUND: Knee osteoarthritis has a lifetime risk of nearly one in two, with obese individuals being most susceptible. While exercise is universally recognized as a critical component for management, unsafe or ineffective exercise frequently leads to exacerbation of joint symptoms. AIM: Evaluate the effect of a 12week lower body positive pressure (LBPP) supported low-load treadmill walking program on knee pain, joint function, and performance of daily activities in patients with knee osteoarthritis (OA)...
January 8, 2018: Knee
https://www.readbyqxmd.com/read/29322310/relationship-between-sagittal-spinal-curves-geometry-and-isokinetic-trunk-muscle-strength-in-adults
#10
Walaa Elsayed, Ahmed Farrag, Qassim Muaidi, Nora Almulhim
PURPOSE: Sagittal spinal deviation has been reported to be a significant musculoskeletal problem affecting both genders and could develop at any age. Factors triggering this issue are still not well defined. The purpose of this study was to investigate the relationship between sagittal spine angles and isokinetic peak, average torque, and power of trunk muscles in asymptomatic adults. METHODS: A convenient sample of 79 subjects with asymptomatic spine participated in this study...
January 10, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29321059/intrarater-reliability-of-the-humac-norm-isokinetic-dynamometer-for-strength-measurements-of-the-knee-and-shoulder-muscles
#11
Bas Habets, J Bart Staal, Marsha Tijssen, Robert van Cingel
OBJECTIVE: To determine the intrarater reliability of the Humac NORM isokinetic dynamometer for concentric and eccentric strength tests of knee and shoulder muscles. RESULTS: 54 participants (50% female, average age 20.9 ± 3.1 years) performed concentric and eccentric strength measures of the knee extensors and flexors, and the shoulder internal and external rotators on two different Humac NORM isokinetic dynamometers, which were situated at two different centers...
January 10, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29318172/clinical-factors-that-predict-a-second-acl-injury-after-acl-reconstruction-and-return-to-sport-preliminary-development-of-a-clinical-decision-algorithm
#12
Mark V Paterno, Bin Huang, Staci Thomas, Timothy E Hewett, Laura C Schmitt
Background: Biomechanical predictors of a second anterior cruciate ligament (ACL) injury after ACL reconstruction (ACLR) and return to sport (RTS) have been identified; however, these measures may not be feasible in a standard clinical environment. Purpose/Hypothesis: The purpose of this study was to evaluate whether standard clinical measures predicted the risk of second ACL injuries. The hypothesis tested was that a combination of strength, function, and patient-reported measures at the time of RTS would predict the risk of second ACL injuries with high sensitivity and specificity...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29317222/do-performance-measures-of-strength-balance-and-mobility-predict-quality-of-life-and-community-reintegration-after-stroke
#13
Joshua W Cohen, Tanya D Ivanova, Brenda Brouwer, Kimberly J Miller, Dianne Bryant, S Jayne Garland
OBJECTIVE: To investigate the extent to which physical performance measures of strength, balance and mobility taken at discharge from inpatient stroke rehabilitation can predict health-related quality of life (HRQoL) and community reintegration after 6 months. DESIGN: Longitudinal Study SETTING: University Laboratory PARTICIPANTS: Seventy-five adults recruited within one month following discharge home from inpatient stroke rehabilitation. Inclusion criteria were: major unilateral hemispheric stroke, English speaking, able to communicate, discharged home...
January 6, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29316902/the-effect-of-ankle-tape-on-joint-position-sense-after-local-muscle-fatigue-a-randomized-controlled-trial
#14
Akram Jahjah, Dietmar Seidenspinner, Karl Schüttler, Antonio Klasan, Thomas J Heyse, Dominik Malcherczyk, Bilal Farouk El-Zayat
BACKGROUND: Ankle tape is widely used by athletes to prevent ankle sprain. Although there is growing evidence that ankle tape improve joint position sense, but yet it is not clear even if tape improve joint position sense after muscle fatigue, because fatigue impair joint position sense and raise the risk of ankle sprain. The aim of this study is to examine the effect of ankle tape on joint position sense after local muscle fatigue. METHOD: This trial is a randomized controlled trial...
January 9, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29315348/knee-strength-ratios-in-competitive-female-athletes
#15
Jaroslaw Kabacinski, Michal Murawa, Krzysztof Mackala, Lechoslaw Bogdan Dworak
Knee strength ratios are related to the movement patterns, sport-specific training and knee injuries in athletes. The purpose of this study was to determine the ratios in the concentric isokinetic strength of the hamstrings and quadriceps and the isometric strength of the knee extensors. In female basketball players (n = 14) and female volleyball players (n = 12) were evaluated: the hamstrings to quadriceps peak torque ratio (H/Q) and side-to-side peak torque ratio (TR) for hamstrings and quadriceps; the ratio of the maximal bilateral strength to the summed maximal unilateral strength (B/U) and side-to-side maximal strength ratio (SR) for knee extensors...
2018: PloS One
https://www.readbyqxmd.com/read/29299474/improvement-in-hamstring-and-quadriceps-muscle-strength-following-cruciate-retaining-single-radius-total-knee-arthroplasty
#16
Jennifer Kurowicki, Anton Khlopas, Assem A Sultan, Nipun Sodhi, Linsen T Samuel, Morad Chughtai, Martin Roche, Peter M Bonutti, Michael A Mont
Background: The ability to reach full functional capacity following total knee arthroplasty (TKA) is reliant on the strength of the quadriceps and hamstring muscles. Weakness of these muscles can persist anywhere from 1 to 3 years post-operatively. There remains considerable controversy as to what factors influence restoration of muscle strength after TKA. Implant designs have been implicated in the ability of patients to recover. Currently there is a paucity of literature available describing the influence of patient characteristics, surgical factors, and clinical outcomes on quadriceps and hamstring muscle strength following TKA with a cruciate-retaining, single radius (SR) implant...
December 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/29299219/comparison-of-elbow-flexor-isokinetic-peak-torque-and-fatigue-index-between-men-and-women-of-different-training-level
#17
Paulo Gentil, Mario Hebling Campos, Saulo Soares, Gustavo De Conti Teixeira Costa, Antonio Paoli, Antonino Bianco, Martim Bottaro
The purpose of the study was to compare elbow flexion peak torque (PT) and fatigue index (FI) during isokinetic concentric contractions in men and women with different training levels. Sixty-eight young men and women were divided into four groups: resistance trained men (RTM), non-resistance trained men (NRTM), resistance trained women (RTW) and non- resistance trained women (NRTW). Participants performed two tests on an isokinetic dynamometer, one to evaluate PT and one to evaluate FI. Significant interactions were found for sex and resistance training status with both PT and FI...
December 5, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29291279/january-2018-corrigendum
#18
(no author information available yet)
Corrections to an article published in the March 2013 issue of JOSPT: Xergia SA, Pappas E, Zampeli F, Georgiou S, Georgoulis AD. Asymmetries in functional hop tests, lower extremity kinematics, and isokinetic strength persist 6 to 9 months following anterior cruciate ligament reconstruction. J Orthop Sports Phys Ther 2018;48(1):52. doi:10.2519/jospt.2018.48.1.52.
January 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29287523/knee-isokinetic-performance-following-anterior-cruciate-ligament-reconstruction-patellar-tendon-versus-hamstrings-graft
#19
Felipe Machado, Pedro Debieux, Camila Cohen Kaleka, Diego Astur, Maria Stella Peccin, Moisés Cohen
OBJECTIVE: To compare knee isokinetic performance six months after reconstruction of the anterior cruciate ligament using grafts from either the patellar tendon or the hamstrings among patients who underwent the same rehabilitation protocol. METHODS: Thirty-four patients were evaluated (17 with grafts from the patellar tendon and 17 with grafts from the hamstrings). Operated and non-operated knees were compared with regards to the variables of peak torque, work and the hamstring/quadriceps relationship at velocities of 60º/s and 180º/s and power of 180º/s after six months of surgery...
December 19, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/29284166/functional-screening-tests-interrelationships-and-ability-to-predict-vertical-jump-performance
#20
Irineu Loturco, Lucas Adriano Pereira, Ronaldo Kobal, Cesar Cavinato Cal Abad, William Komatsu, Ronaldo Cunha, Gustavo Arliani, Benno Ejnisman, Alberto de Castro Pochini, Fábio Yuzo Nakamura, Moises Cohen
There are several methods used in sports science to identify asymmetries in athletes, given their purported relevance to injury prevention and performance optimization. We aimed to verify whether asymmetries provided by isokinetic assessments, jump tests, and tensiomyography (TMG) are associated with each other, and whether their respective functional indices are related to jumping ability. TMG parameters, unilateral and bilateral squat-jump (SJ) and countermovement-jump (CMJ) performances, and peak torque in knee-extension and flexion with angular velocities of 60o/s and 300o/s for twenty-four soccer players were retained for analyses...
December 28, 2017: International Journal of Sports Medicine
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