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https://www.readbyqxmd.com/read/28329753/benefits-of-high-intensity-exercise-training-to-patients-with-chronic-obstructive-pulmonary-disease-a-controlled-study
#1
Tobias Boeselt, Christoph Nell, Lea Lütteken, Katharina Kehr, Janine Koepke, Sandra Apelt, Martina Veith, Björn Beutel, Marc Spielmanns, Timm Greulich, Claus F Vogelmeier, Klaus Kenn, Sabina Janciauskiene, Peter Alter, A Rembert Koczulla
BACKGROUND: Various exercise training programs are used for patients with chronic obstructive pulmonary disease (COPD) of different severity. OBJECTIVES: To investigate the impact of individualized high-intensity training on exercise capacity with COPD. METHODS: A total of 49 patients agreed to participate. Of these, 31 were assigned to the training group and 18 served as controls. The training group exercised twice a week for 90 min with consecutively increasing loads...
March 23, 2017: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/28328712/resistance-training-induced-elevations-in-muscular-strength-in-trained-men-are-maintained-after-2-weeks-of-detraining-and-not-differentially-affected-by-whey-protein-supplementation
#2
Paul S Hwang, Thomas L Andre, Sarah K McKinley-Barnard, Flor E Morales Marroquín, Joshua J Gann, Joon J Song, Darryn S Willoughby
Hwang, PS, Andre, TL, McKinley-Barnard, SK, Morales Marroquín, FE, Gann, JJ, Song, JJ, and Willoughby, DS. Resistance training-induced elevations in muscular strength in trained men are maintained after 2 weeks of detraining and not differentially affected by whey protein supplementation. J Strength Cond Res 31(4): 869-881, 2017-Resistance training (RT) with nutritional strategies incorporating whey protein intake postexercise can stimulate muscle protein synthesis and elicit hypertrophy. The early phases of training-induced anabolic responses can be attenuated with longer-term training...
April 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28326563/early-structural-and-functional-signature-of-3-day-human-skeletal-muscle-disuse-using-the-dry-immersion-model
#3
Rémi Demangel, Loïc Treffel, Guillaume Py, Thomas Brioche, Allan F Pagano, Marie-Pierre Bareille, Arnaud Beck, Laurence Pessemesse, Robin Candau, Claude Gharib, Angèle Chopard, Catherine Millet
Microgravity and hypoactivity are associated with skeletal muscle deconditioning. The decrease of muscle mass is an exponential decay with major changes in the first days. The purpose of the study was to dissect out the effects of a short-term 3-day dry immersion (DI) on human quadriceps muscle function and structure. The DI model, by suppressing all support zones, accurately reproduces the effects of microgravity. Twelve healthy volunteers (32 ± 5 yrs) completed 3 days of DI. Muscle function was investigated through maximal voluntary contraction (MVC) tests and muscle viscoelasticity...
March 22, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28325123/effect-of-stimulation-of-cold-receptors-with-menthol-on-emg-activity-of-quadriceps-muscle-during-low-load-contraction
#4
Tadayuki Tokunaga, Hitoshi Sugawara, Chigaya Tadano, Masuo Muro
PURPOSE: Facilitatory and inhibitory responses of spinal motor neurons are influenced by somatosensory input from the skin. The purpose of this study, employing electromyography, was to examine the neuromuscular changes that occur with menthol applied to the skin over the quadriceps muscle. METHODS: Forty-two healthy volunteers performed isometric knee extensions at 35% maximum voluntary contraction (MVC) in three groups (Adult Placebo, Adult Menthol, Older Adult Menthol)...
March 21, 2017: Somatosensory & Motor Research
https://www.readbyqxmd.com/read/28325029/noninvasive-eeg-correlates-of-overground-and-stair-walking
#5
Justin A Brantley, Trieu Phat Luu, Recep Ozdemir, Fangshi Zhu, Anna T Winslow, Helen Huang, Jose L Contreras-Vidal
Automated walking intention detection remains a challenge in lower-limb neuroprosthetic systems. Here, we assess the feasibility of extracting motor intent from scalp electroencephalography (EEG). First, we evaluated the corticomuscular coherence between central EEG electrodes (C1, Cz, C2) and muscles of the shank and thigh during walking on level ground and stairs. Second, we trained decoders to predict the linear envelope of the surface electromyogram (EMG). We observed significant EEG-led corticomuscular coupling between electrodes and sEMG (tibialis anterior) in the high delta (3-4 Hz) and low theta (4-5 Hz) frequency bands during level walking, indicating efferent signaling from the cortex to peripheral motor neurons...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324994/co-activation-periods-of-gastrocnemius-and-vastus-lateralis-during-walking-evaluated-by-surface-electromyography
#6
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/28321478/the-anterolateral-complex-in-anterior-cruciate-ligament-deficient-knees-demonstrate-sonographic-abnormalities-on-high-resolution-sonography
#7
Masahito Yoshida, Elmar Herbst, Macio Albers, Volker Musahl, Freddie H Fu, Kentaro Onishi
PURPOSE: The presence of anterolateral ligament of the knee is still controversial, and some physicians prefer to call this structure anterolateral complex (ALC) to infer plural nature of structures involved. The purpose of this study was to describe the scanning techniques and to classify various sonographic appearances of the tibial-side ALC of the knee in subjects with anterior cruciate ligament (ACL) injury. It was hypothesized that sonographic abnormity of the ALC would be associated with ACL injury history...
March 20, 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
#8
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/28319872/intrathecal-baclofen-bolus-reduces-exaggerated-extensor-coactivation-during-pre-swing-and-early-swing-of-gait-after-acquired-brain-injury
#9
John W Chow, Stuart A Yablon, Dobrivoje S Stokic
OBJECTIVE: To characterize the concurrent activation of rectus femoris (RF) and medial gastrocnemius (MG) muscles (extensor coactivation) during gait in subjects with pronounced resting hypertonia after acquired brain injury (ABI) and examine changes after intrathecal baclofen (ITB) bolus injection. METHODS: Magnitude and duration of extensor coactivation during different phases of gait were assessed by recording gait kinematics and activity in bilateral RF and MG muscles in 18 controls and 18 ABI subjects before and at 2, 4, and 6h after a 50-μg ITB injection...
March 2, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28318098/decreased-insulin-stimulated-brown-adipose-tissue-glucose-uptake-after-short-term-exercise-training-in-healthy-middle-aged-men
#10
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/28317895/upregulation-of-skeletal-muscle-pgc-1%C3%AE-through-the-elevation-of-cyclic-amp-levels-by-cyanidin-3-glucoside-enhances-exercise-performance
#11
Toshiya Matsukawa, Hideko Motojima, Yuki Sato, Shinya Takahashi, Myra O Villareal, Hiroko Isoda
Regular exercise and physical training enhance physiological capacity and improve metabolic diseases. Skeletal muscles require peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α) in the process of their adaptation to exercise owing to PGC-1α's ability to regulate mitochondrial biogenesis, angiogenesis, and oxidative metabolism. Cyanidin-3-glucoside (Cy3G) is a natural polyphenol and a nutraceutical factor, which has several beneficial effects on human health. Here, the effect of Cy3G on exercise performance and the underlying mechanisms involved were investigated...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28316588/alterations-of-muscle-activation-pattern-in-stroke-survivors-during-obstacle-crossing
#12
Chenming Ma, Na Chen, Yurong Mao, Dongfeng Huang, Rong Song, Le Li
OBJECTIVE: This study investigates changes in the neuromuscular activation pattern of the lower limb muscles in stroke survivors when crossing obstacles of three different heights. METHODS: Eight stroke survivors and eight age-, height-, and gender-matched healthy controls were recruited and instructed to cross over obstacles with heights of 10, 20, and 30% leg length. Surface electromyography (EMG) signals were recorded from the rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA), and medial gastrocnemius (MG) of both limbs...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28316157/-the-diagnostic-value-of-plasma-fibrin-related-markers-in-perioperation-of-femoral-fracture
#13
J Li, Z Chen, L H Zhang, Z L Li, D M Wu, S S Wang, L J Xu, H Xu, P F Tang, C B Wang
Objective: To investigate potential value of fibrin related markers in patients with femoral fracture during perioperative period. Methods: Ninety-five patients were enrolled, including 39 males with (53±24) years old and 56 females with (73±13) years old, of which 44 fracture on caput femoris, 34 collum femoris and 17 shaft of femur. Sampling on the day before operation and 1(st,) 3(rd,) 5(th) days after operation, fibrin monomer (FM), D-dimer(DD), fibrinogen degradation product (FDP) and other coagulation assays were detected by reagents from Stago...
March 14, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28314618/drop-punt-kicking-induces-eccentric-knee-flexor-weakness-associated-with-reductions-in-hamstring-electromyographic-activity
#14
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
#15
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
#16
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/28300287/analysis-of-stroma-labeling-during-multiple-passage-of-a-sarcoma-imageable-patient-derived-orthotopic-xenograft-ipdox-in-red-fluorescent-protein-transgenic-nude-mice
#17
Tasuku Kiyuna, Takashi Murakami, Yasunori Tome, Kei Kawaguchi, Kentaro Igarashi, Kentaro Miyake, Fuminori Kanaya, Arun Singh, Fritz C Eilber, Robert M Hoffman
A patient-derived orthotopic xenograft (PDOX) model of undifferentiated pleomorphic sarcoma (UPS) was previously established that acquired red fluorescent protein (RFP)-expressing stroma by growth in an RFP transgenic nude mouse. In the present study, an imageable PDOX model (iPDOX) of UPS was established by orthotopic implantation in the biceps femoris of transgenic RFP nude mice. After the tumors grew to a diameter of 10 mm, they were harvested and the brightest portion of the tumors were subsequently orthotopically transplanted to both RFP and non-colored nude mice...
March 16, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28298673/single-step-extraction-and-derivatization-of-intramuscular-lipids-for-fatty-acid-ultra-fast-gc-analysis-application-on-pig-thigh
#18
Eleonora Laura De Paola, Giuseppe Montevecchi, Francesca Masino, Andrea Antonelli, Domenico Pietro Lo Fiego
Two different methods for single step transesterification from pig meat without fat extraction have been tested. Freeze-drying of the meat with and without anhydrous salt, followed by a base-catalyzed transmethylation (KOH/MeOH) was carried out. Both methods were compared with the standard Folch procedure of fat extraction followed by transmethylation. The methods were tested on a complete sample set of biceps femoris of pig thigh, used for the production of dry-cured ham. The set was divided in three subgroups according to total fat content...
March 2017: Journal of Food Science and Technology
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
#19
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/28290752/mri-based-assessment-of-lower-extremity-muscle-volumes-in-patients-before-and-after-acl-reconstruction
#20
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
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