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https://www.readbyqxmd.com/read/28319422/phototherapy-for-improvement-of-performance-and-exercise-recovery-comparison-of-3-commercially-available-devices
#1
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/28317206/vena-contracta-analysis-by-color-doppler-three-dimensional-transesophageal-echocardiography-shows-geometrical-differences-between-prolapse-and-pseudoprolapse-in-eccentric-mitral-regurgitation
#2
Javier Berdejo, Maiko Shiota, Hirotsugu Mihara, Yuji Itabashi, Hiroto Utsunomiya, Takahiro Shiota
AIMS: Evaluation of eccentric mitral regurgitation (MR) remains extremely difficult and the role played by its etiology, functional or degenerative, is not well understood. This study aimed to demonstrate the value of three-dimensional transesophageal echocardiography (3DTEE) in the evaluation of eccentric MR identifying geometric differences in the vena contracta area between functional and degenerative etiologies. METHODS AND RESULTS: We studied 61 patients with eccentric MR (30 functional and 31 degenerative)...
March 19, 2017: Echocardiography
https://www.readbyqxmd.com/read/28315596/effects-of-hip-and-trunk-muscle-strengthening-on-hip-function-and-lower-limb-kinematics-during-step-down-task
#3
Vanessa Lara Araújo, Thales Rezende Souza, Viviane Otoni do Carmo Carvalhais, Aline Castro Cruz, Sérgio Teixeira Fonseca
BACKGROUND: Strengthening of the hip and trunk muscles has the potential to change lower limb kinematic patterns, such as excessive hip medial rotation and adduction during weight-bearing tasks. This study aimed to investigate the effect of hip and trunk muscles strengthening on hip muscle performance, hip passive properties, and lower limb kinematics during step-down task in women. METHODS: Thirty-four young women who demonstrated dynamic knee valgus during step-down were divided into two groups...
February 27, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28315014/association-of-native-t1-times-with-biventricular-function-and-hemodynamics-in-precapillary-pulmonary-hypertension
#4
Yin Yin Chen, Hong Yun, Hang Jin, De Hong Kong, Yu Liang Long, Cai Xia Fu, Shan Yang, Meng Su Zeng
In precapillary pulmonary hypertension (PH) patients, we sought to (1) investigate the relationship between ventricular insertion point (VIP) T1 times, hemodynamic parameters, and biventricular function, and (2) determine the predictors of anterior and inferior VIP T1 time. Twenty-two patients with precapillary PH underwent 1.5-T cardiac MR, right heart catheterization (RHC), and echocardiography. A group of 10 healthy age- and sex-matched volunteers served as controls. Biventricular function, morphology and mass were obtained from short-axis cine images...
March 17, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28314618/drop-punt-kicking-induces-eccentric-knee-flexor-weakness-associated-with-reductions-in-hamstring-electromyographic-activity
#5
Steven J Duhig, Morgan D Williams, Geoffrey M Minett, David Opar, Anthony J Shield
OBJECTIVES: To examine the effect of 100 drop punt kicks on isokinetic knee flexor strength and surface electromyographic activity of bicep femoris and medial hamstrings. DESIGN: Randomized control study. METHODS: Thirty-six recreational footballers were randomly assigned to kicking or control groups. Dynamometry was conducted immediately before and after the kicking or 10min of sitting (control). RESULTS: Eccentric strength declined more in the kicking than the control group (p<0...
September 20, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28314091/changes-in-muscle-architecture-of-biceps-femoris-induced-by-eccentric-strength-training-with-nordic-hamstring-exercise
#6
Diego Alonso-Fernandez, Pedro Docampo-Blanco, Juan Martinez-Fernandez
Eccentric strength training alters muscle architecture, but it is also an important factor for the prevention of hamstring injuries. The purpose was to determine the architectural adaptations of the Biceps Femoris long head (BFlh) after eccentric strength training with Nordic Hamstring exercise (NHE), followed by a subsequent detraining period. The participants in this intervention (n = 23) completed a period of 13 weeks consisting of a first week of control and prior training, followed by 8 weeks of eccentric strength training with NHE, and concluding with a 4-week period of detraining...
March 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28314055/localization-of-muscle-damage-within-the-quadriceps-femoris-induced-by-different-types-of-eccentric-exercises
#7
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/28302709/acute-impact-of-conventional-and-eccentric-cycling-on-platelet-and-vascular-function-in-patients-with-chronic-heart-failure
#8
Andrew Haynes, Matthew D Linden, Lauren C Chasland, Kazunori Nosaka, Andrew J Maiorana, Ellen Adele Dawson, Lawrence Dembo, Louise H Naylor, Daniel J Green
Evidence-based guidelines recommend exercise therapy for patients with chronic heart failure (CHF). Such patients have increased atherothrombotic risk. Exercise can transiently increase platelet activation and reactivity and decrease vascular function in healthy participants, although data in CHF is scant. Eccentric (ECC) cycling is a novel exercise modality which may be particularly suited to patients with CHF, but the acute impacts of ECC on platelet and vascular function are currently unknown. Our null hypothesis was that ECC and concentric (CON) cycling, performed at matched external workloads, would not induce changes in platelet or vascular function in patients with CHF...
March 16, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28298302/visual-and-presaccadic-activity-in-area-8ar-of-the-macaque-monkey-lateral-prefrontal-cortex
#9
Kelly R Bullock, Florian Pieper, Adam J Sachs, Julio C Martinez-Trujillo
Common trends observed in many visual and oculomotor-related cortical areas include retinotopically organized receptive and movement fields exhibiting a Gaussian shape and increasing size with eccentricity. These trends are demonstrated in the frontal eye fields (FEF), many visual areas, and the superior colliculus (SC), but have not been thoroughly characterized in prearcuate area 8Ar of the prefrontal cortex. This is important since area 8Ar, located anterior to the FEF, is more cytoarchitectonically similar to prefrontal areas than premotor areas...
March 15, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28298284/changes-in-body-weight-and-composition-are-associated-with-changes-in-left-ventricular-geometry-and-function-in-the-general-population-ship-study-of-health-in-pomerania
#10
Marcello Ricardo Paulista Markus, Nicole Werner, Sabine Schipf, Ulrike Siewert-Markus, Martin Bahls, Sebastian Edgar Baumeister, Henry Völzke, Stephan Burkhard Felix, Till Ittermann, Marcus Dörr
BACKGROUND: The different effects of total body weight (TBW), fat-free mass (FFM), and fat mass (FM) on left ventricular (LV) geometry and function are complex. We investigated the associations of changes over time in TBW, FM, and FFM with changes in LV geometry and function. METHODS AND RESULTS: We analyzed data from 1189 subjects (694 women), aged 44 to 86 years, from the baseline and the 5-year follow-up examination of the population-based SHIP (Study of Health in Pomerania)...
March 2017: Circulation. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28297922/eigenvector-statistics-of-the-product-of-ginibre-matrices
#11
Zdzisław Burda, Bartłomiej J Spisak, Pierpaolo Vivo
We develop a method to calculate left-right eigenvector correlations of the product of m independent N×N complex Ginibre matrices. For illustration, we present explicit analytical results for the vector overlap for a couple of examples for small m and N. We conjecture that the integrated overlap between left and right eigenvectors is given by the formula O=1+(m/2)(N-1) and support this conjecture by analytical and numerical calculations. We derive an analytical expression for the limiting correlation density as N→∞ for the product of Ginibre matrices as well as for the product of elliptic matrices...
February 2017: Physical Review. E
https://www.readbyqxmd.com/read/28295522/effects-of-progressive-hypoventilation-on-left-ventricular-appearance-an-alternative-etiology-of-acute-sonographic-short-axis-d-shaping
#12
Viktor Kromann Ringgård, Anders Høyer Sørensen, Kristian Borup Wemmelund, Erik Sloth, Peter Juhl-Olsen
OBJECTIVES: The purpose of this study was to evaluate the effects of progressive hypoventilation on echocardiographic measures of the left ventricular (LV) appearance in a porcine model. METHODS: Ten piglets were included in the experimental group, and 5 served as controls. The experimental group underwent 3 interventions of progressive hypoventilation (baseline: tidal volume, 240 mL; respiratory frequency, 16 minutes(-1) ; first intervention: tidal volume, 240 mL; respiratory frequency, 8 minutes-1; second intervention: tidal volume, 240 mL; respiratory frequency, 4 minutes(-1) ; and third intervention: tidal volume, 120 mL; respiratory frequency, 4 minutes(-1) )...
March 15, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28294698/the-relationship-between-the-golf-swing-plane-and-ball-impact-characteristics-using-trajectory-ellipse-fitting
#13
Andrew Morrison, Denise McGrath, Eric S Wallace
The trajectory of the clubhead close to ball impact during the golf swing has previously been shown to be planar. However, the relationship between the plane orientation and the orientation characteristics of the clubhead at ball impact has yet to be defined. Fifty-two male golfers (27 high skilled, 25 intermediate skilled) hit 40 drives each in an indoor biomechanics laboratory. This study successfully fitted the trajectory of the clubhead near impact to an ellipse for each swing for players of different skill levels to help better explain this relationship...
March 15, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28293200/eccentric-exercise-and-the-critically-ill-patient
#14
W Kyle Mitchell, Tanja Taivassalo, Marco V Narici, Martino V Franchi
No abstract text is available yet for this article.
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28293194/quantification-of-internal-stress-strain-fields-in-human-tendon-unraveling-the-mechanisms-that-underlie-regional-tendon-adaptations-and-mal-adaptations-to-mechanical-loading-and-the-effectiveness-of-therapeutic-eccentric-exercise
#15
REVIEW
Constantinos N Maganaris, Panagiotis Chatzistergos, Neil D Reeves, Marco V Narici
By virtue of their anatomical location between muscles and bones, tendons make it possible to transform contractile force to joint rotation and locomotion. However, tendons do not behave as rigid links, but exhibit viscoelastic tensile properties, thereby affecting the length and contractile force in the in-series muscle, but also storing and releasing elastic stain energy as some tendons are stretched and recoiled in a cyclic manner during locomotion. In the late 90s, advancements were made in the application of ultrasound scanning that allowed quantifying the tensile deformability and mechanical properties of human tendons in vivo...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28293141/eshelby-s-problem-of-a-spherical-inclusion-eccentrically-embedded-in-a-finite-spherical-body
#16
W-N Zou, Q-C He
Resorting to the superposition principle, the solution of Eshelby's problem of a spherical inclusion located eccentrically inside a finite spherical domain is obtained in two steps: (i) the solution to the problem of a spherical inclusion in an infinite space; (ii) the solution to the auxiliary problem of the corresponding finite spherical domain subjected to appropriate boundary conditions. Moreover, a set of functions called the sectional and harmonic deviators are proposed and developed to work out the auxiliary solution in a series form, including the displacement and Eshelby tensor fields...
February 2017: Proceedings. Mathematical, Physical, and Engineering Sciences
https://www.readbyqxmd.com/read/28292262/low-adiponectin-is-associated-with-diastolic-dysfunction-in-women-a-cross-sectional-study-from-the-troms%C3%A3-study
#17
Jon V Norvik, Henrik Schirmer, Kirsti Ytrehus, Trond G Jenssen, Svetlana N Zykova, Anne E Eggen, Bjørn O Eriksen, Marit D Solbu
BACKGROUND: Heart failure with preserved ejection fraction is closely associated with diastolic dysfunction and related to obesity and female sex. We investigated whether adiponectin, an adipocyte-secreted protein hormone with cardioprotective effects, was associated with indices of diastolic dysfunction, and whether the association was sex dependent. METHODS: We conducted a cross-sectional study on 1165 women and 896 men without diabetes. We stratified the multivariable adjusted logistic regression analyses and the fractional polynomial regression analyses according to sex, with echocardiographic markers of diastolic dysfunction as dependent variables, and adiponectin as the independent variable of interest...
March 14, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28291948/eccentric-training-for-tendon-healing-after-acute-lesion-a-rat-model
#18
Jean-François Kaux, Vincent Libertiaux, Pierre Leprince, Marianne Fillet, Vincent Denoel, Clémence Wyss, Christelle Lecut, André Gothot, Caroline Le Goff, Jean-Louis Croisier, Jean-Michel Crielaard, Pierre Drion
BACKGROUND: The tendon is a dynamic entity that remodels permanently. Platelet-rich plasma (PRP) injection has been shown to have a beneficial effect on tendon healing after lesion in rats. Furthermore, eccentric exercise seems to improve the mechanical quality of the tendon. HYPOTHESIS: A combination of PRP injection and eccentric training might be more effective than either treatment alone. STUDY DESIGN: Controlled laboratory study. METHODS: Adult male rats were anesthetized, an incision was performed in the middle of their left patellar tendon and an injection of physiological fluid (PF) or homologous PRP was randomly made at the lesion level...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28291122/smarcb1-ini-1-deficient-sinonasal-carcinoma-a-series-of-39-cases-expanding-the-morphologic-and-clinicopathologic-spectrum-of-a-recently-described-entity
#19
Abbas Agaimy, Arndt Hartmann, Cristina R Antonescu, Simion I Chiosea, Samir K El-Mofty, Helene Geddert, Heinrich Iro, James S Lewis, Bruno Märkl, Stacey E Mills, Marc-Oliver Riener, Thomas Robertson, Ann Sandison, Sabine Semrau, Roderick H W Simpson, Edward Stelow, William H Westra, Justin A Bishop
To more fully characterize the clinical and pathologic spectrum of a recently described tumor entity of the sinonasal tract characterized by loss of nuclear expression of SMARCB1 (INI1), we analyzed 39 SMARCB1-deficient sinonasal carcinomas collected from multiple medical centers. The tumors affected 23 males and 16 females with an age range of 19 to 89 years (median, 52). All patients presented with locally advanced disease (T3, n=5; T4, n=27) involving the sinuses (mainly ethmoid) with variable involvement of the nasal cavity...
April 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28291022/effects-of-descending-stair-walking-on-health-and-fitness-of-elderly-obese-women
#20
Trevor C Chen, Chung-Chan Hsieh, Kuo-Wei Tseng, Chih-Chiao Ho, Kazunori Nosaka
PURPOSE: Eccentric exercise training produces positive fitness and health outcomes, but whether this is also the case for descending stair walking (DSW) is unknown. This study investigated the hypothesis that DSW would improve insulin sensitivity, lipid profiles and physical fitness better than ascending stair walking (ASW). METHODS: Elderly (≥60 y) obese women were placed to either DSW or ASW group (n=15/group). An elevator was used to eliminate ascending stairs for DSW, and descending stairs for ASW...
March 13, 2017: Medicine and Science in Sports and Exercise
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