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https://www.readbyqxmd.com/read/28742112/energy-cost-of-isolated-resistance-exercises-across-low-to-high-intensities
#1
Victor Machado Reis, Nuno Domingos Garrido, Jeferson Vianna, Ana Catarina Sousa, José Vilaça Alves, Mário Cardoso Marques
This study aimed to estimate the energy cost across various intensities at eight popular resistance exercises: half squat, 45° inclined leg press, leg extension, horizontal bench press, 45° inclined bench press, lat pull down, triceps extension and biceps curl. 58 males (27.5 ± 4.9 years, 1.78 ± 0.06 m height, 78.67 ± 10.7 kg body mass and 11.4 ± 4.1% estimated body fat) were randomly divided into four groups of 14 subjects each. For each group, two exercises were randomly assigned and on different days, they performed four bouts of 5-min constant-intensity for each of the two assigned exercises: 12%, 16%, 20% and 24% 1-RM...
2017: PloS One
https://www.readbyqxmd.com/read/28739313/cardiac-amyloidosis-an-update-on-pathophysiology-diagnosis-and-treatment
#2
REVIEW
Omar K Siddiqi, Frederick L Ruberg
The amyloidoses are a group of systemic diseases characterized by organ deposition of misfolded protein fragments of diverse origins. The natural history of the disease, involvement of other organs, and treatment options vary significantly based on the protein of origin. In AL amyloidosis, amyloid protein is derived from immunoglobulin light chains, and most often involves the kidneys and the heart. ATTR amyloidosis is categorized as mutant or wild-type depending on the genetic sequence of the transthyretin (TTR) protein produced by the liver...
July 13, 2017: Trends in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28735427/biomechanical-evaluation-of-distal-biceps-tendon-repair-using-tension-slide-technique-and-knotless-fixation-technique
#3
David D Savin, Hristo Piponov, Jonathan N Watson, Ari R Youderian, Farid Amirouche, Giovanni F Solitro, Mark R Hutchinson, Benjamin A Goldberg
BACKGROUND: Acute distal biceps tendon ruptures are uncommon injuries that often affect young active males, typically resulting from an eccentric load on their dominant extremity. The purpose of this study was to compare pullout strength and tendon gapping in the tension slide technique (TST) versus a knotless fixation technique (KFT). METHODS: Two sets of experiments were performed using cadaveric elbow specimens. In the first experiment, eight elbows from different cadavers were tested to compare TST with a standard locking whipstitch with KFT, four elbows in each group, using a standard locking whipstitch...
July 22, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28732761/the-use-of-intermuscular-coherence-analysis-as-a-novel-approach-to-detect-age-related-changes-on-postural-muscle-synergy
#4
Adriana M Degani, Charles T Leonard, Alessander Danna-Dos-Santos
The overall goal of this study was to investigate potential adaptations brought about by the natural processes of aging on the coordination of postural muscles. Considering the progressive and non-homogeneous deterioration of sensorimotor and neuromuscular systems as the individual grows older, it was hypothesized that aging is associated with a reorganization of synergistic mechanisms controlling postural muscles. Therefore, the presence, distribution, and strength of correlated neural inputs to three posterior postural muscles were measured by intermuscular coherence estimations at a low frequency band (0-55Hz)...
July 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28732494/the-effects-of-therapeutic-hip-exercise-with-abdominal-core-activation-on-recruitment-of-the-hip-muscles
#5
Mandy Ky Chan, Ka Wai Chow, Alfred Ys Lai, Noble Kc Mak, Jason Ch Sze, Sharon Mh Tsang
BACKGROUND: Core stabilization has been utilized for rehabilitation and prevention of lower limb musculoskeletal injuries. Previous studies showed that activation of the abdominal core muscles enhanced the hip muscle activity in hip extension and abduction exercises. However, the lack of the direct measurement and quantification of the activation level of the abdominal core muscles during the execution of the hip exercises affect the level of evidence to substantiate the proposed application of core exercises to promote training and rehabilitation outcome of the hip region...
July 21, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28730695/concurrent-electrical-cervicomedullary-stimulation-and-cervical-transcutaneous-spinal-direct-current-stimulation-results-in-a-stimulus-interaction
#6
Siobhan C Dongés, Siwei Bai, Janet L Taylor
Transcutaneous spinal direct current stimulation (tsDCS) can modulate neuronal excitability within the human spinal cord; however few studies have used tsDCS at a cervical level. This study aimed to further characterise cervical tsDCS by observing its acute effects on motor responses to transcranial magnetic stimulation (TMS) and cervicomedullary stimulation. In both Study 1 and 2, participants (Study 1: n = 8, 4F; Study 2: n = 8, 3F) received two periods of 10 min, 3 mA cervical tsDCS on the same day through electrodes placed in an anterior-posterior configuration over the neck; one period with the cathode posterior (c-tsDCS) and the other with the anode posterior (a-tsDCS)...
July 20, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28730689/relationships-among-muscle-fiber-type-composition-fiber-diameter-and-mrf-gene-expression-in-different-skeletal-muscles-of-naturally-grazing-wuzhumuqin-sheep-during-postnatal-development
#7
Qimuge Siqin, Tadayuki Nishiumi, Takahisa Yamada, Shuiqing Wang, Wenjun Liu, Rihan Wu, Gerelt Borjigin
The aim of this study was to determine the relationships among muscle fiber-type composition, fiber diameter, and myogenic regulatory factor (MRF) gene expression in different skeletal muscles during development in naturally grazing Wuzhumuqin sheep. Three major muscles (i.e. the Longissimus dorsi (LD), Biceps femoris (BF) and Triceps brachii (TB)) were obtained from 20 Wuzhumuqin sheep and 20 castrated rams at each of the following ages: 1, 3, 6, 9, 12 and 18 months. Muscle fiber-type composition and fiber diameter were measured using histochemistry and morphological analysis, and MRF gene expression levels were determined using real-time PCR...
July 20, 2017: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28728368/assessment-of-frozen-storage-duration-effect-on-quality-characteristics-of-various-horsemeat-muscles
#8
Pil Nam Seong, Hyun Woo Seo, Jin Hyoung Kim, Soo Hyun Cho, Yoon Seok Kim, Beom Young Park, Hoa Van Ba
Objective: The study aimed at assessing the effects of frozen storage duration on quality characteristics, lipid oxidation and sensory quality of various horse muscles. Methods: Five representative muscles: longissimus dorsi (LD), gluteus medius (GM), semimembranosus (SM), biceps femoris (BF) and triceps brachii (TB) at 24 h post-mortem obtained from 28-mo-old Jeju female breed horses (n=8) were used in the present investigation. The muscles were vacuum-packaged and frozen at -20oC for 120, 240 and 360 days...
June 27, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28727669/differential-pulmonary-rehabilitation-outcomes-in-patients-with-and-without-copd-role-of-gender
#9
Lam-Phuong Nguyen, Emily Beck, Katherine Cayetano, Chin-Shang Li, Kimberly Hardin
PURPOSE: Individuals with all forms of pulmonary disease are referred for pulmonary rehabilitation. This study examines pulmonary rehabilitation outcomes between individuals with chronic obstructive lung disease (COPD) and non-COPD disease and the impact of gender. METHODS: This is a retrospective study at a tertiary center. The primary endpoint was the difference in 6-min walk test distance. Secondary measurements included treadmill and NuStep minutes; biceps curls and front arm raises load; quality of life measured by the St George's Respiratory Questionnaire; and University of California San Diego-Shortness of Breath Questionnaire (UCSD-SOBQ) scores...
July 19, 2017: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/28727124/similar-effects-of-lysine-deficiency-in-muscle-biochemical-characteristics-of-fatty-and-lean-piglets
#10
P Palma-Granados, A Haro, I Seiquer, L Lara, J F Aguilera, R Nieto
The main objective of this work was to investigate the effects of feeding Lys-deficient diets on muscle biochemical characteristics, particularly intramuscular fat concentration and fatty acid profile, in a fatty (Iberian) and a conventional pig genotype (Landrace × Large White [LDW]) maintained in identical experimental conditions. Performance and plasma metabolite changes were also monitored. Twenty-eight barrows of 10 kg initial BW, 14 of Iberian and 14 of LDW breed, were randomly assigned to each of 2 experimental diets in a 2 × 2 factorial arrangement (2 breeds × 2 diets)...
July 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28727042/dietary-supplementation-with-arginine-and-glutamic-acid-modifies-growth-performance-carcass-traits-and-meat-quality-in-growing-finishing-pigs
#11
C J Hu, Q Y Jiang, T Zhang, Y L Yin, F N Li, J P Deng, G Y Wu, X F Kong
Sixty Duroc × Large White × Landrace pigs with an average initial BW of 77.1 ± 1.3 kg were used to investigate the effects of dietary supplementation with arginine and glutamic acid on growth performance, carcass traits, and meat quality in growing-finishing pigs. The animals were randomly assigned to 1 of 5 treatment groups (12 pigs/group, male:female ratio 1:1). The pigs in the control group were fed a basal diet (basal diet group), and those in the experimental groups were fed the basal diet supplemented with 2...
June 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28725314/actions-of-the-biceps-brachii-at-the-shoulder-a-review
#12
REVIEW
Dennis Landin, Melissa Thompson, Meghan R Jackson
Bi-articular muscles cross more than one joint and contribute to motion at both joints, and the extremities of the human body contain several such muscles. Actions produced by all muscles are determined, to a large extent, by joint moment arms and muscle length. These are transient factors which change as joint angles are altered. Measuring muscle moments while manipulating both joints will produce a better understanding of the actions of bi-articular muscles. This review summarizes investigations which have explored the actions of the biceps brachii as shoulder and elbow joints are moved into various angle combinations...
August 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/28719995/biomechanics-of-the-proximal-radius-following-drilling-of-the-bicipital-tuberosity-to-mimic-cortical-button-distal-biceps-repair-technique
#13
Nikhil R Oak, John R Lien, Alexander Brunfeldt, Jeffrey N Lawton
BACKGROUND: A fracture through the proximal radius is a theoretical concern after cortical button distal biceps fixation in an active patient. The permanent, nonossified cortical defect and medullary tunnel is at risk during a fall eliciting rotational and compressive forces. We hypothesized that during simulated torsion and compression, in comparison with unaltered specimens, the cortical button distal biceps repair model would have decreased torsional and compressive strength and would fracture in the vicinity of the bicipital tuberosity bone tunnel...
March 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/28719731/anatomical-vs-functional-motor-points-of-selected-upper-body-muscles
#14
Alexander Franz, Joschua Klaas, Moritz Schumann, Thomas Frankewitsch, Timm J Filler, Michael Behringer
Introduction We aimed to identify nerve entry points (NEP) of superficial skeletal muscles obtained by dissection of 20 human cadavers and to compare those to motor points (MP) previously obtained by electrical stimulation. Methods The biceps brachii- (BB), trapezius (TZ), latissimus dorsi (LD), pectoralis major (Pmaj) and pectoralis minor muscles (Pmin) were dissected from human cadavers. Mean values ±SD of the NEPs of each muscle were calculated. F-tests with Bonferroni corrections were used to compare NEPs and MPs...
July 18, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28717628/does-combined-strength-training-and-local-vibration-improve-isometric-maximum-force-a-pilot-study
#15
Ruben Goebel, Monoem Haddad, Heinz Kleinöder, Zengyuan Yue, Thomas Heinen, Joachim Mester
BACKGROUND: The aim of the study was to determine whether a combination of strength training (ST) and local vibration (LV) improved the isometric maximum force of arm flexor muscles. ST was applied to the left arm of the subjects; LV was applied to the right arm of the same subjects. The main aim was to examine the effect of LV during a dumbbell biceps curl (Scott Curl) on isometric maximum force of the opposite muscle among the same subjects. It is hypothesized, that the intervention with LV produces a greater gain in isometric force of the arm flexors than ST...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717347/effect-of-eicosapentaenoic-acids-rich-fish-oil-supplementation-on-motor-nerve-function-after-eccentric-contractions
#16
Eisuke Ochi, Yosuke Tsuchiya, Kenichi Yanagimoto
BACKGROUND: This study investigated the effect of supplementation with fish oil rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on the M-wave latency of biceps brachii and muscle damage after a single session of maximal elbow flexor eccentric contractions (ECC). METHODS: Twenty-one men were completed the randomized, double-blind, placebo-controlled, and parallel-design study. The subjects were randomly assigned to the fish oil group (n = 10) or control group (n = 11)...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28717093/paraneoplastic-anti-3-hydroxy-3-methylglutary-coenzyme-a-reductase-antibody-positive-immune-mediated-necrotizing-myopathy-in-a-patient-with-uterine-cancer
#17
Atsushi Mizuma, Maiko Kouchi, Shizuka Netsu, Sachiko Yutani, Ruriko Kitao, Shigeaki Suzuki, Kenya Murata, Eiichiro Nagata, Shunya Takizawa
We report the case of a 69-year-old woman with proximal limb muscle weakness, who received post-operative chemotherapy for uterine cancer. Her serum creatinine kinase level was high (10,779 mg/dL) and a muscle biopsy from her left biceps revealed various sizes of muscle fibers accompanied by necrotic and regenerating fibers. She was positive for anti-3 hydroxy-3-methylglutary-coenzyme A reductase (anti-HMGCR) antibodies, but negative for anti-signal recognition particle (anti-SRP) antibodies. She was diagnosed with immune-mediated necrotizing myopathy (IMNM) and treated with prednisolone...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28713535/strength-training-with-repetitions-to-failure-does-not-provide-additional-strength-and-muscle-hypertrophy-gains-in-young-women
#18
Saulo Martorelli, Eduardo Lusa Cadore, Mikel Izquierdo, Rodrigo Celes, André Martorelli, Vitor Alonso Cleto, José Gustavo Alvarenga, Martim Bottaro
This study investigated the effects of a 10-week resistance training to failure on neuromuscular adaptations in young women. Eighty-nine active young women were randomly assigned to one of three groups: 1) repetitions to failure (RF; three sets of repetitions to failure); 2) repetitions not to failure with equalized volume (RNFV; four sets of 7 repetitions); and 3) repetitions not to failure (RNF; three sets of 7 repetitions). All groups performed the elbow flexor exercise (bilateral biceps curl) and trained 2 days per week using 70% of 1RM...
June 24, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/28713459/the-effects-of-bench-press-variations-in-competitive-athletes-on-muscle-activity-and-performance
#19
Atle Hole Saeterbakken, Dag-André Mo, Suzanne Scott, Vidar Andersen
The aim of the study was to compare the EMG activity performing 6RM competition style bench press (flat bench-wide grip) with 1) medium and narrow grip widths on a flat bench and 1) inclined and declined bench positions with a wide grip. Twelve bench press athletes competing at national and international level participated in the study. EMG activity was measured in the pectoralis major, anterior and posterior deltoid, biceps brachii, triceps brachii and latissimus dorsi. Non-significant differences in activation were observed between the three bench positions with the exception of 58...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28711376/motor-evoked-potentials-in-patients-with-chronic-whiplash-associated-disorder-grade-ii
#20
Jacques De Reuck
BACKGROUND AND PURPOSE: It is common belief that psychological problems influence the persistence of complains in patients with so-called mild whiplash-associated disorders (WADs). The usefulness of motor evoked potentials (MEPs) is investigated in patients with grade II WAD and remaining complains for more than 6 months. PATIENTS AND METHODS: Twenty consecutive patients, aged between 24 and 58 years, with persistent neck pain for months after a car accident were included...
July 8, 2017: Neurologia i Neurochirurgia Polska
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