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https://www.readbyqxmd.com/read/28099237/lower-limb-muscular-strength-balance-and-mobility-levels-in-adults-following-severe-thermal-burn-injuries
#1
Mohammed T A Omar, Amal M Abd El Baky, Anwar A Ebid
Severe burn injuries are associated with hypermetabolic response and increased catabolism. These lead to a vast loss of muscle mass and reduced muscle strength and function. Therefore, the aim of this study is to determine the impact of severe burn injuries on lower-limb muscular strength, balance, and mobility level in adults. Forty burned adults with burned TBSA (burned TBSA) ≥40% participated in this study. The peak torque and total work of quadriceps and knee flexors were calculated at 150°/sec using Biodex isokinetic dynamometer...
January 10, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28095581/long-term-adherence-and-effectiveness-of-a-multicomponent-intervention-for-community-dwelling-overweight-thai-older-adults-with-knee-osteoarthritis-1-year-follow-up
#2
Suparb Aree-Ue, Yuwadee Saraboon, Basia Belza
Being overweight is a major risk factor for developing knee osteoarthritis (OA). The purpose of the current study was to: (a) determine participant adherence to a quadriceps exercise and weight management program after completion of the intervention; and (b) examine whether a quadriceps exercise and weight management program can reduce knee pain and improve knee function and weight loss in 40 community-dwelling overweight Thai older adults with knee OA at 6- and 12-month follow up. Twenty-nine (76.3%) participants completed at least 75% of the program...
January 17, 2017: Journal of Gerontological Nursing
https://www.readbyqxmd.com/read/28092813/walking-mechanics-for-patellofemoral-pain-subjects-with-similar-self-reported-pain-levels-can-differ-based-upon-neuromuscular-activation
#3
Matthew K Seeley, S Jun Son, Hyunsoo Kim, J Ty Hopkins
Patellofemoral pain (PFP) is often studied on subjects who are classified using only self-reported data. Neuromuscular activation influences movement mechanics for PFP subjects, but is not likely to be self-reported. We compared lower-extremity mechanics, during a common movement (walking), between two subdivisions of a group of PFP subjects that were similar, based on common self-report tools, but different, based on a common objective measure of quadriceps activation. Our intent was to highlight the importance of objectively considering neuromuscular activation when researching PFP movement mechanics...
January 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28079176/adductor-canal-block-versus-femoral-nerve-block-for-total-knee-arthroplasty-a-meta-analysis-of-randomized-controlled-trials
#4
Duan Wang, Yang Yang, Qi Li, Shen-Li Tang, Wei-Nan Zeng, Jin Xu, Tian-Hang Xie, Fu-Xing Pei, Liu Yang, Ling-Li Li, Zong-Ke Zhou
Femoral nerve blocks (FNB) can provide effective pain relief but result in quadriceps weakness with increased risk of falls following total knee arthroplasty (TKA). Adductor canal block (ACB) is a relatively new alternative providing pure sensory blockade with minimal effect on quadriceps strength. The meta-analysis was designed to evaluate whether ACB exhibited better outcomes with respect to quadriceps strength, pain control, ambulation ability, and complications. PubMed, Embase, Web of Science, Wan Fang, China National Knowledge Internet (CNKI) and the Cochrane Database were searched for RCTs comparing ACB with FNB after TKAs...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078435/the-effects-of-therapeutic-exercises-on-pain-muscle-strength-functional-capacity-balance-and-hemodynamic-parameters-in-knee-osteoarthritis-patients-a-randomized-controlled-study-of-supervised-versus-home-exercises
#5
Tuğba Kuru Çolak, Bahar Kavlak, Onur Aydoğdu, Emir Şahin, Gönül Acar, İlkşan Demirbüken, Zübeyir Sarı, İlker Çolak, Güven Bulut, M Gülden Polat
The aim of the study was to compare the effects of low-intensity exercise programs for lower extremities, either supervised or at home, on pain, muscle strength, balance and the hemodynamic parameters of knee osteoarthritis (OA) patients. This randomized study included 78 patients with knee OA in 2 groups of supervised and home-based exercise program. Exercises were applied to the first group in the clinic as a group exercise program and were demonstrated to the second group to be performed at home. Before and after the 6-week exercise program, assessment was made of pain, quadriceps and hamstring muscle strengths, 6-min walk test (6MWT), and non-invasive hemodynamic parameters...
January 11, 2017: Rheumatology International
https://www.readbyqxmd.com/read/28071729/rules-of-tissue-packing-involving-different-cell-types-human-muscle-organization
#6
Daniel Sánchez-Gutiérrez, Aurora Sáez, Pedro Gómez-Gálvez, Carmen Paradas, Luis M Escudero
Natural packed tissues are assembled as tessellations of polygonal cells. These include skeletal muscles and epithelial sheets. Skeletal muscles appear as a mosaic composed of two different types of cells: the "slow" and "fast" fibres. Their relative distribution is important for the muscle function but little is known about how the fibre arrangement is established and maintained. In this work we capture the organizational pattern in two different healthy muscles: biceps brachii and quadriceps. Here we show that the biceps brachii muscle presents a particular arrangement, based on the different sizes of slow and fast fibres...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070911/effects-of-exercise-training-on-brain-derived-neurotrophic-factor-in-skeletal-muscle-and-heart-of-rats-post-myocardial-infarction
#7
Heow Won Lee, Monir Ahmad, Hong-Wei Wang, Frans H H Leenen
Exercise training post myocardial infarction (MI) attenuates progressive left ventricle (LV) remodeling and dysfunction, but the peripheral stimuli induced by exercise which trigger these beneficial effects are still unclear. We investigated as possible mediators fibronectin type III domain-containing protein 5 (FNDC5) and brain-derived neurotrophic factor (BDNF) in the skeletal muscle and heart. Male Wistar rats underwent either sham surgery or ligation of left descending coronary artery, and surviving MI rats were allocated to either sedentary (Sed-MI) or exercise group (ExT-MI)...
January 9, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28068982/effect-of-proximal-translation-of-the-osteotomized-tibial-tuberosity-during-tibial-tuberosity-advancement-on-patellar-position-and-patellar-ligament-angle
#8
Jack D Neville-Towle, Mariano Makara, Kenneth A Johnson, Katja Voss
BACKGROUND: Cranial cruciate ligament insufficiency is a common orthopaedic problem in canine patients. This cadaveric and radiographic study was performed with the aim of determining the effect of proximal translation of the tibial tuberosity during tibial tuberosity advancement (TTA) on patellar position (PP) and patellar ligament angle (PLA). RESULTS: Disarticulated left hind limb specimens harvested from medium to large breed canine cadavers (n = 6) were used for this study...
January 9, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28068727/comparison-of-muscle-recovery-following-bi-cruciate-substituting-versus-posterior-stabilized-total-knee-arthroplasty-in-the-asian-population
#9
Akihito Takubo, Keinosuke Ryu, Takanori Iriuchishima, Yasuaki Tokuhashi
The purpose of this study was to compare muscle recovery in the lower extremities following the newly developed bi-cruciate substituting (BCS) to posterior stabilized (PS) total knee arthroplasty (TKA) in the Asian population. Forty-one knees in 41 patients undergoing BCS-TKA (41 female, average age: 71 ± 8.8) and 34 knees in 34 patients undergoing PS-TKA (33 female, average age: 73 ± 7.2) were included in this study. The maximum isometric power of the quadriceps and hamstring muscles was measured preoperatively, and at 1, 3, 6, and 12 months after surgery using a handheld dynamometer...
January 9, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28068656/mechanisms-of-improved-exercise-performance-under-hyperoxia
#10
Silvia Ulrich, Elisabeth D Hasler, Séverine Müller-Mottet, Stephan Keusch, Michael Furian, Tsogyal D Latshang, Simon Schneider, Stéphanie Saxer, Konrad E Bloch
BACKGROUND: The impact of hyperoxia on exercise limitation is still incompletely understood. OBJECTIVES: We investigated to which extent breathing hyperoxia enhances the exercise performance of healthy subjects and which physiologic mechanisms are involved. METHODS: A total of 32 healthy volunteers (43 ± 15 years, 12 women) performed 4 bicycle exercise tests to exhaustion with ramp and constant-load protocols (at 75% of the maximal workload [Wmax] on FiO2 0...
January 10, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28068520/impact-loading-following-quadriceps-strength-training-in-individuals-with-medial-knee-osteoarthritis-and-varus-alignment
#11
Crystal O Kean, Rana S Hinman, Tim V Wrigley, Boon-Whatt Lim, Kim L Bennell
BACKGROUND: Greater impact loading at initial contact is postulated to play a role in the progression of osteoarthritis. Quadriceps weakness is common in individuals with knee osteoarthritis and may contribute to high impact loading. The purpose of this study was to examine the effects of quadriceps strengthening on impact loading parameters. METHODS: Data from 97 individuals with knee osteoarthritis who participated in a randomized clinical trial examining effects of a 12-week quadriceps strengthening program was used to conduct this secondary exploratory analysis...
January 4, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28066619/clinical-management-of-chronic-obstructive-pulmonary-disease-patients-with-muscle-dysfunction
#12
REVIEW
Joaquim Gea, Carme Casadevall, Sergi Pascual, Mauricio Orozco-Levi, Esther Barreiro
Muscle dysfunction is frequently observed in chronic obstructive pulmonary disease (COPD) patients, contributing to their exercise limitation and a worsening prognosis. The main factor leading to limb muscle dysfunction is deconditioning, whereas respiratory muscle dysfunction is mostly the result of pulmonary hyperinflation. However, both limb and respiratory muscles are also influenced by other negative factors, including smoking, systemic inflammation, nutritional abnormalities, exacerbations and some drugs...
November 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28065978/spontaneous-bilateral-quadriceps-rupture-in-a-patient-with-ankylosing-spondylitis-a-case-report
#13
Azib Shahid, Hafiz Shahid Mushtaq, Syed Muhammad Azfar
Ankylosing spondylitis is a prototype rheumatoid factor-negative spondyloarthropathy that causes the vertebrae to fuse making the spine less flexible, resulting in a hunched-forward posture. A 47-year-old male who was a known case of ankylosing spondylitis presented with left quadriceps rupture after raising his right foot to lightly hit a football. He was fitted with a knee immobilizer as an emergency measure. The extent of the rupture was not yet established when patient requested leave to go home. The right quadriceps was ruptured as well when he took his immobilizer off to go the bathroom...
January 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28063610/ultrasound-measurements-of-skeletal-muscle-architecture-are-associated-with-strength-and-functional-capacity-in-older-adults
#14
Isaac Selva Raj, Stephen R Bird, Anthony J Shield
The goal of this study was to determine whether ultrasound measures of muscle architecture can be used to infer strength and functional capacity in older adults. Thirty-six healthy older adults (aged 68.2 ± 5.3 y) undertook isokinetic dynamometry for isometric and isokinetic concentric knee extensor strength, the 6-m fast walk, timed up and go, stair climb and descent and vertical jump tests. Longitudinal brightness-mode ultrasound scans (probe frequency, 10 MHz) of the vastus lateralis, vastus intermedius, rectus femoris and gastrocnemius medialis were obtained, and muscle architecture measures (thickness, fascicle pennation angle and fascicle length) were correlated with the aforementioned strength and functional measures...
January 4, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28061746/microrna-expression-patterns-in-post-natal-mouse-skeletal-muscle-development
#15
Séverine Lamon, Evelyn Zacharewicz, Lauren C Butchart, Liliana Orellana, Jasmine Mikovic, Miranda D Grounds, Aaron P Russell
BACKGROUND: MiRNAs are essential regulators of skeletal muscle development and homeostasis. To date, the role and regulation of miRNAs in myogenesis have been mostly studied in tissue culture and during embryogenesis. However, little information relating to miRNA regulation during early post-natal skeletal muscle growth in mammals is available. Using a high-throughput miRNA qPCR-based array, followed by stringent statistical and bioinformatics analysis, we describe the expression pattern and putative role of 768 miRNAs in the quadriceps muscle of mice aged 2 days, 2 weeks, 4 weeks and 12 weeks...
January 7, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28060927/acute-effects-of-three-neuromuscular-warm-up-strategies-on-several-physical-performance-measures-in-football-players
#16
Francisco Ayala, Ana Calderón-López, Juan Carlos Delgado-Gosálbez, Sergio Parra-Sánchez, Carlos Pomares-Noguera, Sergio Hernández-Sánchez, Alejandro López-Valenciano, Mark De Ste Croix
No studies have analysed the acute effects of the FIFA 11+ and Harmoknee warm-up programmes on major physical performance measures. The aim of this study was to analyse the acute (post-exercise) effects of the FIFA 11+, Harmoknee and dynamic warm-up routines on several physical performance measures in amateur football players. A randomized, crossover and counterbalanced study design was used to address the purpose of this study. A total of sixteen amateur football players completed the following protocols in a randomized order on separate days: a) FIFA 11+; b) Harmoknee; and c) dynamic warm-up (DWU)...
2017: PloS One
https://www.readbyqxmd.com/read/28060455/self-reported-quality-of-sleep-is-associated-with-physical-strength-among-community-dwelling-young-old-adults
#17
Katarzyna B Malinowska, Tome Ikezoe, Noriaki Ichihashi, Hidenori Arai, Kimihiko Murase, Kazuo Chin, Takahisa Kawaguchi, Yasuharu Tabara, Takeo Nakayama, Fumihiko Matsuda, Tadao Tsuboyama
AIM: The present study examined the association between self-reported quality of sleep (QOS) and physical function in community-dwelling young-old adults. METHODS: This cross-sectional study included 737 community-dwelling older adults aged 60 years and older (498 women, 239 men); age 68.3 ± 5.2 years (range 60-79 years). Participants completed a self-administered questionnaire, which included the Pittsburgh Sleep Quality Index, as well as information regarding sociodemographic characteristics, physical activity, smoking and alcohol consumption...
January 6, 2017: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/28060273/induction-and-assessment-of-exertional-skeletal-muscle-damage-in-humans
#18
Michael R Deyhle, Jacob R Sorensen, Robert D Hyldahl
Contraction-induced muscle damage via voluntary eccentric (lengthening) contractions offers an excellent model for studying muscle adaptation and recovery in humans. Herein we discuss the design of an eccentric exercise protocol to induce damage in the quadriceps muscles, marked by changes in strength, soreness, and plasma creatine kinase levels. This method is simple, ethical, and widely applicable since it is performed in human participants and eliminates the interspecies translation of the results. Subjects perform 300 maximal eccentric contractions of the knee extensor muscles at a speed of 120°/sec on an isokinetic dynamometer...
December 11, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28060035/etiology-and-recovery-of-neuromuscular-fatigue-following-simulated-soccer-match-play
#19
Kevin Thomas, Jack Dent, Glyn Howatson, Stuart Goodall
PURPOSE: We profiled the etiology and recovery of neuromuscular fatigue post-simulated-soccer-match-play. METHODS: Fifteen semi-professional players completed a 90 min simulated soccer match. Pre-, immediately-post and at 24, 48 and 72 h participants completed a battery of neuromuscular, physical and perceptual tests. Perceived fatigue and muscle soreness were assessed via visual analogue scales. Maximum voluntary contraction (MVC) and twitch responses to electrical (femoral nerve) and magnetic (motor cortex) stimulation during isometric knee-extensor contractions and at rest were measured to assess central (voluntary activation, VA) and peripheral (quadriceps potentiated twitch force, Qtw,pot) fatigue, and responses to single and paired-magnetic stimuli were assessed to quantify corticospinal excitability and short-intracortical inhibition (SICI), respectively...
January 3, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28056487/non-invasive-assessment-of-muscle-injury-in-healthy-and-dystrophic-animals-with-electrical-impedance-myography
#20
Benjamin Sanchez, Shama R Iyer, Jia Li, Kush Kapur, Su Xu, Seward Rutkove, Richard M Lovering
INTRODUCTION: Dystrophic muscle is particularly susceptible to eccentric contraction-induced injury. We tested the hypothesis that electrical impedance myography (EIM) can detect injury induced by maximal-force lengthening contractions. METHODS: We induced injury in the quadriceps of wild type (WT) and dystrophic (mdx) mice with eccentric contractions using an established model. RESULTS: mdx quadriceps had significantly larger losses in peak twitch and tetany compared to losses in WT quadriceps...
January 5, 2017: Muscle & Nerve
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