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https://www.readbyqxmd.com/read/29334674/relationship-between-jumping-abilities-and-skeletal-muscle-architecture-of-lower-limbs-in-humans-systematic-review-and-meta-analysis
#1
J D Ruiz-Cárdenas, J J Rodríguez-Juan, J Ríos-Díaz
The aim of this study was to examine the influence of skeletal muscle architecture (SMA) features measured by 2-D ultrasonography on jumping performance in humans. A systematic review and meta-analysis was conducted, registry number: CRD42016043602. The scientific literature was systematically searched in eight databases, last run on March 14th, 2017. Cross-sectional studies focused on the association between SMA features and vertical jumping performance were selected. A random-effects model was used to analyze the influence of lower-limb SMA and maximal jump height...
January 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29333801/efficacy-of-the-regent-suit-based-rehabilitation-on-gait-emg-patterns-in-hemiparetic-subjects-a-pilot-study
#2
Luigi Iuppariello, Giovanni D'Addio, Maria Romano, Paolo Bifulco, Nicola Pappone, Bernardo Lanzillo, Mario Cesarelli
BACKGROUND: The recovery of the functional limb mobility of patients with cerebral damages can take great benefit of the role offered by proprioceptive rehabilitation. Recently have been developed a special Regent Suit (RS) for rehabilitative applications. Actually, there are preliminary studies which describes the effects of RS on gait recovery of stroke patients in acute stage, but none in chronic stage. Moreover, it is known that motor recovery does not always reflect improvements of the muscle activity and coactivity...
January 11, 2018: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29332757/activation-of-lower-limb-muscles-with-different-types-of-mount-in-hippotherapy
#3
Mariane Fernandes Ribeiro, Ana Paula Espindula, Domingos Emanuel Bevilacqua Júnior, Jéssica Aparecida Tolentino, Carolina Fioroni Ribeiro da Silva, Márcia Fernandes Araújo, Alex Abadio Ferreira, Vicente de Paula Antunes Teixeira
OBJECTIVES: To analyze muscle activation of lower limbs (LL) of subjects in hippotherapy sessions. METHODS: The study included 10 healthy subjects, five male and five female, with an average age of 24.03 (±4.06) years. Subjects underwent four hippotherapy sessions of 30 min with interval of one week, and each session was performed with a different type of mount material in the following order: 1st performed with saddle and feet in the stirrups (S1), 2nd with saddle and feet off the stirrups (S2), 3rd with blanket and feet off the stirrup (S3) and 4th with blanket and feet in the stirrups (S4)...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29332743/myoeletric-indices-of-fatigue-adopting-different-rest-intervals-during-leg-press-sets
#4
Humberto Miranda, Marianna Maia, Carlos G de Oliveira, Déborah Farias, Jurandir B da Silva, Vicente P Lima, Jeffrey M Willardson, Gabriel A Paz
INTRODUCTION: The purpose of this study was to examine the acute effect of different rest intervals between multiple sets of the 45° angled leg press exercise (LP45) on surface electromyographic (SEMG) spectral and amplitude indices of fatigue. METHODS: Fifteen recreationally trained females performed three protocols in a randomized crossover design; each consisting of four sets of 10 repetitions with 1 (P1), 3 (P3), or 5 (P5) minute rest intervals between sets...
January 2018: Journal of Bodywork and Movement Therapies
https://www.readbyqxmd.com/read/29330460/enhanced-skeletal-muscle-ribosome-biogenesis-yet-attenuated-mtorc1-and-ribosome-biogenesis-related-signalling-following-short-term-concurrent-versus-single-mode-resistance-training
#5
Jackson J Fyfe, David J Bishop, Jonathan D Bartlett, Erik D Hanson, Mitchell J Anderson, Andrew P Garnham, Nigel K Stepto
Combining endurance training with resistance training (RT) may attenuate skeletal muscle hypertrophic adaptation versus RT alone; however, the underlying mechanisms are unclear. We investigated changes in markers of ribosome biogenesis, a process linked with skeletal muscle hypertrophy, following concurrent training versus RT alone. Twenty-three males underwent eight weeks of RT, either performed alone (RT group, n = 8), or combined with either high-intensity interval training (HIT+RT group, n = 8), or moderate-intensity continuous training (MICT+RT group, n = 7)...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29324825/early-and-later-phases-satellite-cell-responses-and-myonuclear-content-with-resistance-training-in-young-men
#6
Felipe Damas, Cleiton A Libardi, Carlos Ugrinowitsch, Felipe C Vechin, Manoel E Lixandrão, Tim Snijders, Joshua P Nederveen, Aline V Bacurau, Patricia Brum, Valmor Tricoli, Hamilton Roschel, Gianni Parise, Stuart M Phillips
Satellite cells (SC) are associated with skeletal muscle remodelling after muscle damage and/or extensive hypertrophy resulting from resistance training (RT). We recently reported that early increases in muscle protein synthesis (MPS) during RT appear to be directed toward muscle damage repair, but MPS contributes to hypertrophy with progressive muscle damage attenuation. However, modulations in acute-chronic SC content with RT during the initial (1st-wk: high damage), early (3rd-wk: attenuated damage), and later (10th-wk: no damage) stages is not well characterized...
2018: PloS One
https://www.readbyqxmd.com/read/29317845/pyomyositis-in-the-setting-of-complicated-diverticulitis-case-report
#7
James Sun, David Leor Kashan, Jolita Marie Auguste, Akella Chendrasekhar
Pyomyositis is typically thought of as a disease of the tropics. However, it is becoming more prevalent in temperate regions, and may be underdiagnosed. Here, pyomyositis is encountered as a complication of perforated diverticulitis, which has not been previously reported. A 61-year-old Caucasian man initially presented in respiratory distress and was diagnosed with respiratory failure due to COPD exacerbation. The patient was taking high-dose prednisone, 60 mg daily for the past 2 years. Initially, he was afebrile, normotensive, tachycardic to 178 beats/minute and tachypneic to 28 breaths/minute, requiring noninvasive ventilation to maintain oxygenation...
2018: International Journal of General Medicine
https://www.readbyqxmd.com/read/29315567/the-influence-of-capillarization-on-satellite-cell-pool-expansion-and-activation-following-exercise-induced-muscle-damage-in-healthy-young-men
#8
Joshua P Nederveen, Sophie Joanisse, Tim Snijders, Aaron Cq Thomas, Dinesh Kumbhare, Gianni Parise
Factors that determine the skeletal muscle satellite cell (SC) response remain incompletely understood. It is known, however, that SC activation status is closely related to the anatomical relationship between SC and muscle capillaries. We investigated the impact of muscle fibre capillarization on the expansion and activation status of SC following a muscle damaging exercise protocol in healthy young men. Twenty-nine young men (21 ± 0.5 yrs) performed 300 unilateral eccentric contractions (180 deg·s-1 ) of the knee extensors...
January 6, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29299218/electrical-stimulation-frequency-and-skeletal-muscle-characteristics-effects-on-force-and-fatigue
#9
Maria Vromans, Pouran Faghri
This investigation aimed to determine the force and muscle surface electromyography (EMG) responses to different frequencies of electrical stimulation (ES) in two groups of muscles with different size and fiber composition (fast- and slow-twitch fiber proportions) during a fatigue-inducing protocol. Progression towards fatigue was evaluated in the abductor pollicis brevis (APB) and vastus lateralis (VL) when activated by ES at three frequencies (10, 35, and 50Hz). Ten healthy adults (mean age: 23.2 ± 3.0 years) were recruited; participants signed an IRB approved consent form prior to participation...
December 5, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29290017/weight-bearing-exercise-can-elicit-similar-peak-muscle-activation-as-medium-high-intensity-resistance-exercise-in-elderly-women
#10
Remco J Baggen, Evelien Van Roie, Jaap H van Dieën, Sabine M Verschueren, Christophe Delecluse
PURPOSE: To assess whether stepping-based weight bearing exercise (WBE) can elicit peak activation of upper leg muscles similar to resistance exercise (RE) at an intensity required to induce strength gains in elderly women. METHODS: Muscular activation of several upper leg muscles was measured during RE and WBE in a cohort of 19 healthy elderly women (69.3 ± 3.4 years). WBE consisted of forward and lateral stepping with step heights of 10, 20 and 30 cm. Muscular activation was compared to 60% of one-repetition maximum (1-RM) of congruent RE...
December 30, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29289349/motor-units-in-vastus-lateralis-and-in-different-vastus-medialis-regions-show-different-firing-properties-during-low-level-isometric-knee-extension-contraction
#11
Leonardo Mendes Leal de Souza, Hélio Veiga Cabral, Liliam Fernandes de Oliveira, Taian Martins Vieira
Architectural differences along vastus medialis (VM) and between VM and vastus lateralis (VL) are considered functionally important for the patellar tracking, knee joint stability and knee joint extension. Whether these functional differences are associated with a differential activity of motor units between VM and VL is however unknown. In the present study, we, therefore, investigate neuroanatomical differences in the activity of motor units detected proximo-distally from VM and from the VL muscle. Nine healthy volunteers performed low-level isometric knee extension contractions (20% of their maximum voluntary contraction) following a trapezoidal trajectory...
December 28, 2017: Human Movement Science
https://www.readbyqxmd.com/read/29287785/evaluation-of-muscle-activity-just-after-straight-leg-raising-exercise-by-using-18fdg-pet
#12
Hiroyuki Shiozawa, Takashi Ohsawa, Yoshito Tsushima, Tetsuya Higuchi, Kenji Takagishi, Hirotaka Chikuda
BACKGROUND: Exercise therapy is one of the recognized treatment methods for knee osteoarthritis (KOA). One such exercise technique, straight leg raising (SLR), is widely known as a home exercise method for strengthening the quadriceps femoris muscle. However, whether this exercise truly strengthens the quadriceps is not known. The objective of the present study was to investigate which lower limb muscle is stimulated and shows increased activity with SLR. METHODS: A total of 14 lower limbs in seven healthy adult male volunteers (mean age: 31...
December 26, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29286445/3d-ultrasound-imaging-fast-and-cost-effective-morphometry-of-musculoskeletal-tissue
#13
Guido Weide, Stephan van der Zwaard, Peter A Huijing, Richard T Jaspers, Jaap Harlaar
The developmental goal of 3D ultrasound imaging (3DUS) is to engineer a modality to perform 3D morphological ultrasound analysis of human muscles. 3DUS images are constructed from calibrated freehand 2D B-mode ultrasound images, which are positioned into a voxel array. Ultrasound (US) imaging allows quantification of muscle size, fascicle length, and angle of pennation. These morphological variables are important determinants of muscle force and length range of force exertion. The presented protocol describes an approach to determine volume and fascicle length of m...
November 27, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29283930/a-comparison-of-the-effects-of-endurance-training-on-alternate-days-and-on-consecutive-four-days-each-week-for-eight-weeks-on-the-abundance-of-pgc-1%C3%AE-camkii-nrf-1-mttfa-and-coxiv-proteins-in-rat-skeletal-muscle
#14
Jiwen Qiu, Liping Huang, Allan J Davie, Shi Zhou
The aim of this study was to compare the effects of two training protocols, training on alternate days (A) or on consecutive four days followed by three days of rest in each week (C) for eight weeks, on selected proteins involved in the biogenesis and function of mitochondria in skeletal muscle. Eighty male SD rats were randomly allocated into 10 groups (n=8 each), including Pre and Post control groups, and A or C training groups with 8, 16, 24 and 32 training sessions, respectively. The vastus lateralis and soleus muscle samples were obtained 24 hours after the last training session, or at rest for the controls...
December 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29283696/the-neuromuscular-determinants-of-unilateral-jump-performance-in-soccer-players-are-direction-specific
#15
Conall Murtagh, Christopher Nulty, Jos Vanrenterghem, Andy O'Boyle, Ryland Morgans, Barry Drust, Robert Erskine
PURPOSE: To investigate differences in neuromuscular factors between elite and non-elite players, and to establish which factors underpin direction-specific unilateral jump performance. METHODS: Elite (n=23; age, 18.1 ± 1.0 yrs; BMI, 23.1 ± 1.8 kg/m2) and non-elite (n=20; age, 22.3 ± 2.7 yrs; BMI, 23.8 ± 1.8 kg/m2) soccer players performed three unilateral countermovement jumps (CMJs) on a force platform in the vertical, horizontal-forward and medial directions...
December 28, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29283292/morphological-molecular-and-hormonal-adaptations-to-early-morning-versus-afternoon-resistance-training
#16
Milan Sedliak, Michal Zeman, Gabriel Buzgó, Jan Cvecka, Dusan Hamar, Eugen Laczo, Monika Okuliarova, Marian Vanderka, Tomas Kampmiller, Keijo Häkkinen, Juha P Ahtiainen, Juha J Hulmi, Tormod S Nilsen, Håvard Wiig, Truls Raastad
It has been clearly established that maximal force and power is lower in the morning compared to noon or afternoon hours. This morning neuromuscular deficit can be diminished by regularly training in the morning hours. However, there is limited and contradictory information upon hypertrophic adaptations to time-of-day-specific resistance training. Moreover, no cellular or molecular mechanisms related to muscle hypertrophy adaptation have been studied with this respect. Therefore, the present study examined effects of the time-of-day-specific resistance training on muscle hypertrophy, phosphorylation of selected proteins, hormonal concentrations and neuromuscular performance...
December 28, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29282853/contrast-enhanced-ultrasound-using-bolus-injections-of-contrast-agent-for-assessment-of-postprandial-microvascular-blood-volume-in-human-skeletal-muscle
#17
Kenneth H Mertz, Jacob Bülow, Lars Holm
Methods capable of measuring blood flow in a tissue-specific manner are needed. The purpose of this study was to investigate whether contrast-enhanced ultrasound (CEUS) using bolus injections of SonoVue® is an useful method for assessing postprandial changes in microvascular perfusion in the vastus lateralis muscle. Ten healthy, young subjects were recruited for this study. Six subjects participated in washout and reproducibility protocols to assess washout time of SonoVue® and the reproducibility of the method when measuring microvascular blood volume (MBV)...
December 27, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29261667/increased-lipid-availability-for-three-days-reduces-whole-body-glucose-uptake-impairs-muscle-mitochondrial-function-and-initiates-opposing-effects-on-pgc-1%C3%AE-promoter-methylation-in-healthy-subjects
#18
Roy Eldor, Luke Norton, Marcel Fourcaudot, Cynthia Galindo, Ralph A DeFronzo, Muhammad Abdul-Ghani
AIMS: FFA and FFA metabolites cause insulin resistance and impair beta cell function. The goal of our research was to examine whether elevation of plasma FFA impairs mitochondrial function and alters PGC-1α promoter methylation. METHODS: In this uncontrolled, change from baseline study design, insulin sensitivity and glucose-stimulated insulin secretion were measured in 9 normal glucose tolerant subjects before and after 3 day lipid infusion to elevate plasma FFA concentration...
2017: PloS One
https://www.readbyqxmd.com/read/29260019/influenza-a-h3n2-induced-rhabdomyolysis-complicating-anterior-compartment-syndrome-serial-changes-in-muscle-mri-t2-fat-suppression-imaging
#19
Tadanori Hamano, Akiko Matsunaga, Osamu Yamamura, Masako Nakamura, Yasutaka Kawamura, Itsuro Higuchi, Masaru Kuriyama, Yasunari Nakamoto
Background: Rhabdomyolysis with influenza infection is rarely reported in adults. We report here influenza A induced rhabdomyolysis and anterior compartment syndrome (ACS). Case report: This case report describes a 43-year-old woman exhibiting influenza A induced rhabdomyolysis. High levels of creatine kinase (97,000 IU/L) and high titer of anti-influenza A virus antibody (H3N2) (320 ×) with negative anti-influenza B virus antibody were observed. T2 fat suppression muscle MRI imaging showed high-intensity signals in rectus femoris, vastus lateralis, adductor magnus, and semimembranosus (SM) muscles...
June 2017: ENeurologicalSci
https://www.readbyqxmd.com/read/29258751/intraoperative-and-biomechanical-studies-of-human-vastus-lateralis-and-vastus-medialis-sarcomere-length-operating-range
#20
Jongsang Son, Andy Indresano, Kristin Sheppard, Samuel R Ward, Richard L Lieber
The vast majority of musculoskeletal models are not validated against primary experimental data. Conversely, most human experimental measurements are not explained theoretically using models to provide a mechanistic understanding of experimental results. Here we present a study with both primary human data and primary modeling data. Intraoperative sarcomere length was measured on the human vastus lateralis (VL) and vastus medialis (VM) muscles (n = 8) by laser diffraction. These data were compared to a biomechanical model based on muscle architecture and moment arms obtained independently from cadaveric specimens (n = 9)...
December 7, 2017: Journal of Biomechanics
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