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https://www.readbyqxmd.com/read/28324994/co-activation-periods-of-gastrocnemius-and-vastus-lateralis-during-walking-evaluated-by-surface-electromyography
#1
Alessandro Mengarelli, Annachiara Strazza, Agnese Sbrollini, Angela Agostinelli, Laura Burattini, Sandro Fioretti, Francesco Di Nardo
"In vivo" studies reported that the co-activation of gastrocnemius and quadriceps femoris (QF) muscles produces ACL strain values greater than those caused by an isolated activation of either muscle. Aim of this study was to assess the co-activation of gastrocnemius (lateral head, GL) and vastus lateralis (VL) in healthy and young adults during walking. To this purpose the Statistical Gait Analysis was performed, that allows a characterization of gait considering hundreds of strides belonging to the same walking trial...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324973/force-controlled-ultrasound-to-measure-passive-mechanical-properties-of-muscle-in-duchenne-muscular-dystrophy
#2
Anne J Pigula, Jim S Wu, Matthew W Gilbertson, Basil T Darras, Seward B Rutkove, Brian W Anthony
The purpose of this study is to assess differences in skeletal muscle compressibility between patients with Duchenne muscular dystrophy (DMD) and normal subjects. The transverse passive mechanical properties of muscle, particularly those related to stiffness and elasticity, can be measured using force-controlled ultrasound. We acquired ultrasound videos of muscle compression under known pressures in the biceps and quadriceps in 23 boys with DMD and 20 age-matched healthy controls. We calculated the bulk linear spring constant, nonlinear stress-strain response, and average Young's modulus for each...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324151/higher-hamstring-to-quadriceps-isokinetic-strength-ratio-during-the-first-post-operative-months-in-patients-with-quadriceps-tendon-compared-to-hamstring-tendon-graft-following-acl-reconstruction
#3
Felix Fischer, Christian Fink, Elmar Herbst, Christian Hoser, Caroline Hepperger, Cornelia Blank, Peter Gföller
PURPOSE: The aim of this study was to compare isokinetic quadriceps and hamstring muscle strength in patients following anterior cruciate ligament (ACL) reconstruction who received either hamstring (HT) or quadriceps (QT) tendon autografts at two time intervals within the first year after surgery. METHODS: One hundred twenty-four patients, 81 males (age 22.0 ± 6.2 years) and 43 females (age 20.9 ± 8.7 years), participated in this study. ACL reconstruction was performed with either quadriceps tendon autografts (QT; n = 61) or hamstring tendon autografts (HT; n = 63)...
March 21, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28320184/reliability-of-single-and-paired-pulse-transcranial-magnetic-stimulation-for-the-assessment-of-knee-extensor-muscle-function
#4
John Temesi, Sandy N Ly, Guillaume Y Millet
This study examined inter-session and intra-session transcranial magnetic stimulation (TMS) reliability at two test stimulus intensities in the knee extensors. Strong and weak TMS was delivered via single- and paired- (3-ms and 100-ms inter-stimulus interval) pulses on the same day and different days. All stimuli were delivered during isometric contractions of the knee extensors at 20% of maximal voluntary force. Motor-evoked potentials (MEP) were assessed in quadriceps femoris muscles. Relative (intra-class correlation coefficient, ICC) and absolute (standard error of measurement, SEM) reliability and variability (coefficient of variation) were assessed...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319585/increased-fatigue-response-to-augmented-deceptive-feedback-during-cycling-time-trial
#5
Guillaume P Ducrocq, Thomas J Hureau, Olivier Meste, Grégory M Blain
PURPOSE: This study aimed to investigate the effect of different magnitudes of deception on performance and exercise-induced fatigue during cycling time-trial. METHODS: Following three familiarization visits, three females and eight males performed three 5 km cycling time-trials while following a simulated dynamic avatar reproducing either 100% (5K100%), 102% (5K102%) or 105% (5K105%) of the subject's previous fastest trial. Quadriceps muscle activation was quantified with surface electromyography...
March 18, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28319422/phototherapy-for-improvement-of-performance-and-exercise-recovery-comparison-of-3-commercially-available-devices
#6
Thiago De Marchi, Vinicius Mazzochi Schmitt, Carla Danúbia da Silva Fabro, Larissa Lopes da Silva, Juliane Sene, Olga Tairova, Mirian Salvador
CONTEXT:   Recent studies suggest the prophylactic use of low-powered laser/light has ergogenic effects on athletic performance and postactivity recovery. Manufacturers of high-powered lasers/light devices claim that these can produce the same clinical benefits with increased power and decreased irradiation time; however, research with high-powered lasers is lacking. OBJECTIVE:   To evaluate the magnitude of observed phototherapeutic effects with 3 commercially available devices...
March 20, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28318865/anterior-vs-posterior-periarticular-multimodal-drug-injections-a-randomized-controlled-trial-in-simultaneous-bilateral-total-knee-arthroplasty
#7
Artit Laoruengthana, Piti Rattanaprichavej, Supachok Rasamimongkol, Monton Galassi
BACKGROUND: Currently, various techniques are used to overcome postoperative pain after total knee arthroplasty. A local analgesic infiltration with periarticular multimodal drug injection (PMDI) is favorable because of its simplicity, safety, and efficacy. The present study compared the efficacy of a PMDI at the anterior vs posterior compartments. METHODS: Forty-six patients were randomized to receive the PMDI at either the anterior or posterior compartment, with the contralateral knee receiving the PMDI at the opposite compartment...
February 24, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28318098/decreased-insulin-stimulated-brown-adipose-tissue-glucose-uptake-after-short-term-exercise-training-in-healthy-middle-aged-men
#8
Piryanka Motiani, Kirsi A Virtanen, Kumail K Motiani, Joonas J Eskelinen, Roeland J Middelbeek, Laurie J Goodyear, Anna M Savolainen, Jukka Kemppainen, Jørgen Jensen, Mueez U Din, Virva Saunavaara, Riitta Parkkola, Eliisa Löyttyniemi, Juhani Knuuti, Pirjo Nuutila, Kari K Kalliokoski, Jarna C Hannukainen
AIMS: Little is known about the effects of exercise training on brown adipose tissue (BAT) metabolism in humans. We tested the hypothesis that high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) improve BAT insulin sensitivity. MATERIALS AND METHODS: Healthy middle-aged men (n = 18, age 47 [CI: 49, 43] years, BMI 25.3 [CI: 24.1-26.3] kg · m(-2) , VO2peak 34.8[CI: 32.1, 37.4] ml · kg(-1)  · min(-1) ) were recruited and randomized into six HIIT or MICT sessions within two weeks...
March 20, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28316262/tribute-to-dr-jacques-rogge-muscle-activity-and-fatigue-during-hiking-in-olympic-dinghy-sailing
#9
Jan G Bourgois, Jasmien Dumortier, Margot Callewaert, Bert Celie, Carlo Capelli, Gisela Sjøgaard, Dirk De Clercq, Jan Boone
'A tribute to Dr J. Rogge' aims to systematically review muscle activity and muscle fatigue during sustained submaximal quasi-isometric knee extension exercise (hiking) related to Olympic dinghy sailing as a tribute to Dr Rogge's merits in the world of sports. Dr Jacques Rogge is not only the former President of the International Olympic Committee, he was also an orthopaedic surgeon and a keen sailor, competing at three Olympic Games. In 1972, in fulfilment of the requirements for the degree of Master in Sports Medicine, he was the first who studied a sailors' muscle activity by means of invasive needle electromyography (EMG) during a specific sailing technique (hiking) on a self-constructed sailing ergometer...
March 19, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28316261/effects-of-different-strength-training-frequencies-during-reduced-training-period-on-strength-and-muscle-cross-sectional-area
#10
Lucas Duarte Tavares, Eduardo Oliveira de Souza, Carlos Ugrinowitsch, Gilberto Candido Laurentino, Hamilton Roschel, André Yui Aihara, Fabiano Nassar Cardoso, Valmor Tricoli
This study investigated the effects of different reduced strength training (RST) frequencies on half-squat 1 RM and quadriceps cross-sectional area (QCSA). Thirty-three untrained males (24.7 ± 3.9 years; 1.73 ± 0.08 m; 74.6 ± 8.4 kg) underwent a 16-week experimental period (i.e. eight weeks of strength training [ST] followed by additional eight weeks of RST). During the ST period, the participants performed 3-4 sets of 6-12 RM, three sessions/week in half-squat and knee extension exercises...
March 19, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28314055/localization-of-muscle-damage-within-the-quadriceps-femoris-induced-by-different-types-of-eccentric-exercises
#11
Sumiaki Maeo, Akira Saito, Shun Otsuka, Xiyao Shan, Hiroaki Kanehisa, Yasuo Kawakami
This study examined localization of muscle damage within the quadriceps femoris induced by different types of eccentric exercises by using transverse relaxation time (T2 )-weighted magnetic resonance imaging (MRI). Thirty-three young males performed either of the following three exercises: single-joint eccentric contraction of the knee extensors (KE), eccentric squat (S), or downhill walking (DW) (n=11/exercise). KE and S consisted of 5-set × 10-lowering of 90% one-repetition maximum load. DW was performed for 60 min with -10% slope, 6 km/h velocity, and 20% body mass load carried...
March 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28301321/giant-parathyroid-adenoma-associated-with-severe-hypercalcemia-in-an-adolescent-patient
#12
Kinyas Kartal, Nurcihan Aygun, Mujdat Bankaoglu, Alper Ozel, Mehmet Uludag
BACKGROUND: The objective of this study is to bring attention to the importance of differential diagnosis in adolescent patients with skeletal involvement and hypercalcemia. CASE: A 17-year-old male patient with a complaint of severe leg pain was admitted to our hospital. Seven months before he had a fracture of his distal humerus after falling on to his left shoulder and was treated conservatively. Five months previously, he had a rupture of his quadriceps tendon...
March 16, 2017: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/28298558/performance-of-3-enthesitis-indices-in-patients-with-peripheral-spondyloarthritis-during-treatment-with-adalimumab
#13
Philip J Mease, Filip Van den Bosch, Joachim Sieper, Yinglin Xia, Aileen L Pangan, In-Ho Song
OBJECTIVE: To evaluate the validity of enthesitis indices in patients with peripheral spondyloarthritis (pSpA). METHODS: The ABILITY-2 study evaluated the efficacy of adalimumab (ADA) versus placebo (PBO) in patients with active pSpA over 12 weeks. Patients received open-label ADA for an additional 144 weeks. Twenty-nine enthesitis sites used in 3 enthesitis scoring systems [Leeds Enthesitis Index (LEI), Spondyloarthritis Research Consortium of Canada (SPARCC) Enthesitis Index, Maastricht Ankylosing Spondylitis Enthesitis Score (MASES)] were assessed; discriminatory capacity and treatment response at Week 12 were calculated by standardized mean difference (SMD) and Guyatt's effect size (ES)...
March 15, 2017: Journal of Rheumatology
https://www.readbyqxmd.com/read/28295686/increased-insulin-stimulated-glucose-uptake-in-both-leg-and-arm-muscles-after-sprint-interval-and-moderate-intensity-training-in-subjects-with-type-2-diabetes-or-prediabetes
#14
Tanja J Sjöros, Marja A Heiskanen, Kumail K Motiani, Eliisa Löyttyniemi, Jari-Joonas Eskelinen, Kirsi A Virtanen, Nina J Savisto, Olof Solin, Jarna C Hannukainen, Kari K Kalliokoski
We investigated the effects of sprint interval (SIT) and moderate intensity continuous training (MICT) on glucose uptake (GU) during hyperinsulinemic euglycemic clamp and fatty acid uptake (FAU) at fasting state in thigh and arm muscles in subjects with type 2 diabetes (T2D) or prediabetes. Twenty-six patients (age 49, SD 4; 10 women) were randomly assigned into two groups: SIT (n=13), and MICT (n=13). The exercise in the SIT group consisted of 4-6 x 30 s of all-out cycling with 4 min recovery and in the MICT group 40-60 min cycling at 60% of VO2peak ...
March 13, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28295121/outcomes-at-a-minimum-of-2-years-after-medial-collateral-ligament-reconstruction-using-partial-thickness-quadriceps-tendon-bone-autograft
#15
Iftach Hetsroni, Gideon Mann
This study reports outcomes at a minimum of 2 years after a technique using quadriceps tendon-bone autograft for medial collateral ligament reconstruction. This technique effectively restored medial stability in medial collateral ligament-deficient knees. It is particularly valuable when nonirradiated allograft is unavailable or harvesting medial knee restraints (semitendinosus) for medial collateral ligament reconstruction is to be avoided. [Orthopedics. 201x; xx(x):xx-xx.].
March 14, 2017: Orthopedics
https://www.readbyqxmd.com/read/28293449/subclinical-enthesopathy-in-patients-with-psoriasis-and-its-association-with-other-disease-parameters-a-power-doppler-ultrasonographic-study
#16
Abdelhafeez Moshrif, Ahmed Mosallam, Essam Elden M Mohamed, Wesam Gouda, Mostafa Doma
OBJECTIVE: This study aimed to determine the prevalence of subclinical enthesopathy in patients with psoriasis using power Doppler ultrasonography (PDUS) and its association with other disease parameters. MATERIAL AND METHODS: A total of 50 patients with psoriasis (31 females) aged 19-70 years underwent a thorough clinical examination that included assessment of body mass index (BMI) and psoriasis area and severity index (PASI) score. Measurements of inflammatory markers, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), serum uric acid, and plain radiography of the heels, knees, and sacroiliac joints were performed for all patients...
March 2017: European Journal of Rheumatology
https://www.readbyqxmd.com/read/28290752/mri-based-assessment-of-lower-extremity-muscle-volumes-in-patients-before-and-after-acl-reconstruction
#17
Grant E Norte, Katherine R Knaus, Chris Kuenze, Geoffrey G Handsfield, Craig H Meyer, Silvia S Blemker, Joseph M Hart
CONTEXT: Study of muscle volumes in patients after anterior cruciate ligament (ACL) injury and reconstruction (ACL-R) is largely limited to cross-sectional assessment of the thigh musculature, which may inadequately describe post-traumatic and post-surgical muscle function. No studies have prospectively examined the influence of ACL injury and reconstruction on lower extremity muscle volumes. OBJECTIVE: Assess magnetic resonance imaging (MRI) derived lower extremity muscle volumes, and quantify quadriceps strength and activation in patients following ACL injury and reconstruction...
March 14, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28289890/kinematic-analysis-of-stair-climbing-in-rotating-platform-cruciate-retaining-and-posterior-stabilized-mobile-bearing-total-knee-arthroplasties
#18
Koji Murakami, Satoshi Hamai, Ken Okazaki, Satoru Ikebe, Hiroyuki Nakahara, Hidehiko Higaki, Takeshi Shimoto, Hideki Mizu-Uchi, Umito Kuwashima, Yukihide Iwamoto
INTRODUCTION: The aim of our study was to compare and contrast the effects of two types of mobile-bearing total knee arthroplasties (TKA), namely, the cruciate-retaining (CR) and posterior-stabilized (PS) TKAs, on clinical outcomes and in vivo kinematics during stair climbing. MATERIALS AND METHODS: The Press-Fit Condylar Sigma rotating platform was used for both CR and PS TKAs. Patient-reported outcomes were assessed using the 2011 Knee Society Score. Quadriceps muscle strength was evaluated by isokinetic dynamometry...
March 13, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28286172/age-related-changes-in-skeletal-muscle-composition-a-pilot-nuclear-magnetic-resonance-spectroscopy-study-in-mice
#19
Anatoly P Sobolev, Luisa Mannina, Manuela Costanzo, Barbara Cisterna, Manuela Malatesta, Carlo Zancanaro
The composition of skeletal muscle was investigated in the quadriceps and gastrocnemius muscle of 13-month-old (n=15) and 23-month-old (n=19) mice by means of high-resolution nuclear magnetic resonance (NMR) spectroscopy. Muscle specimens were dissected out, frozen in liquid nitrogen and extracted in chloroform/methanol, and proton NMR spectra of the resulting aqueous and organic fractions were obtained at 600MHz. Several metabolites were unambiguously identified and quantified. Multivariate ANOVA (factor: age, muscle, age×muscle) showed a significant main effect of age (P=0...
March 7, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28284998/acute-mobilization-and-migration-of-bone-marrow-derived-stem-cells-following-anterior-cruciate-ligament-rupture
#20
Tristan Maerz, Mackenzie Fleischer, Michael D Newton, Abigail Davidson, Meagan Salisbury, Perry Altman, Michael D Kurdziel, Kyle Anderson, Asheesh Bedi, Kevin C Baker
OBJECTIVE: Little is known regarding acute local and systemic processes following anterior cruciate ligament (ACL) rupture. No study has elucidated whether bone marrow-derived mesenchymal stem cells (MSCs) are mobilized into circulation and recruited to the injured joint. METHODS: In part one, Lewis rats were randomized to noninvasive ACL rupture (Rupture) or non-injured (Control) (n=6/group). After 72 hours, whole blood MSC concentration was assessed using flow cytometry...
March 8, 2017: Osteoarthritis and Cartilage
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