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Exercise induced muscle damage

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https://www.readbyqxmd.com/read/28095747/effects-of-roller-massager-on-muscle-recovery-after-exercise-induced-muscle-damage
#1
Nuno Casanova, Joana F Reis, João R Vaz, Rita Machado, Bruno Mendes, Duane C Button, Pedro Pezarat-Correia, Sandro R Freitas
Two experiments (n = 10) were conducted to determine the effects of roller massager (RM) on ankle plantar flexor muscle recovery after exercise-induced muscle damage (EIMD). Experiment 1 examined both functional [i.e., ankle plantar flexion maximal isometric contraction and submaximal (30%) sustained force; ankle dorsiflexion maximal range of motion and resistance to stretch; and medial gastrocnemius pain pressure threshold] and morphological [cross-sectional area, thickness, fascicle length, and fascicle angle] variables, before and immediately, 1, 24, 48, and 72 h after an EIMD stimulus...
January 18, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28060273/induction-and-assessment-of-exertional-skeletal-muscle-damage-in-humans
#2
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/28057817/contractile-efficiency-of-dystrophic-mdx-mouse-muscle-in-vivo-and-ex-vivo-assessment-of-adaptation-to-exercise-of-functional-end-points
#3
Roberta Francesca Capogrosso, Paola Mantuano, Anna Cozzoli, Francesca Sanarica, Ada Maria Massari, Elena Conte, Adriano Fonzino, Arcangela Giustino, Jean-Francois Rolland, Angelo Quaranta, Michela De Bellis, Giulia Maria Camerino, Robert W Grange, Annamaria De Luca
Progressive weakness is a typical feature of Duchenne muscular dystrophy (DMD) patients and is exacerbated in the benign mdx mouse model by in vivo treadmill exercise. We hypothesized a different threshold for functional adaptation of mdx muscles in response to the duration of the exercise protocol. In vivo weakness was confirmed by grip strength after 4, 8 and 12 weeks of exercise in mdx mice. Torque measurements revealed that exercise-related weakness in mdx mice correlated with the duration of the protocol, while wild-type (wt) mice were stronger...
January 5, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28054262/does-photobiomodulation-therapy-is-better-than-cryotherapy-in-muscle-recovery-after-a-high-intensity-exercise-a-randomized-double-blind-placebo-controlled-clinical-trial
#4
Thiago De Marchi, Vinicius Mazzochi Schmitt, Guilherme Pinheiro Machado, Juliane Souza de Sene, Camila Dallavechia de Col, Olga Tairova, Mirian Salvador, Ernesto Cesar Pinto Leal-Junior
This study aimed to determine the effectiveness of photobiomodulation therapy (PBMT) and cryotherapy, in isolated and combined forms, as muscle recovery techniques after muscle fatigue-inducing protocol. Forty volunteers were randomly divided into five groups: a placebo group (PG); a PBMT group (PBMT); a cryotherapy group (CG); a cryotherapy-PBMT group (CPG); and a PBMT-cryotherapy group (PCG). All subjects performed four sessions at 24-h intervals, during which they submitted to isometric assessment (MVC) and blood collection in the pre-exercise period, and 5 and 60 min post-exercise, while the muscle fatigue induction protocol occurred after the pre-exercise collections...
January 5, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28051341/effects-of-compression-garment-pressure-on-recovery-from-strenuous-exercise
#5
Jessica Hill, Glyn Howatson, Ken van Someren, David Gaze, Hayley Legg, Jack Lineham, Charles Pedlar
Compression garments are frequently used to facilitate recovery from strenuous exercise. Purpose To identify the effects of two different grades of compression garment on recovery indices following strenuous exercise. Methods Forty five recreationally active participants (n=26 males and n=19 females) completed an eccentric exercise protocol consisting of 100 drop jumps. Following the exercise protocol participants were matched for body mass and randomly but equally assigned to either a high (HI) compression pressure group, a low (LOW) compression pressure group, or a sham ultrasound group (SHAM)...
January 4, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28039193/short-term-intense-exercise-training-reduces-stress-markers-and-alters-the-transcriptional-response-to-exercise-in-skeletal-muscle
#6
James Matthew Hinkley, Adam R Konopka, Miranda K Suer, Matthew P Harber
The purpose of this investigation was to examine the influence of short-term intense endurance training on cycling performance, along with the acute and chronic signaling responses of skeletal muscle stress and stability markers. Ten recreationally active subjects (25 ± 2 yr, 79 ± 3 kg, 47 ± 2 ml·kg·min-1) were studied before and after a 12-day cycling protocol to examine the effects of short-term intense (70-100% VO2max) exercise training on resting and exercise-induced regulation of molecular factors related to skeletal muscle cellular stress and protein stability...
December 30, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28035017/muscle-damage-and-inflammation-during-recovery-from-exercise
#7
Jonathan M Peake, Oliver Neubauer, Paul A Della Gatta, Kazunori Nosaka
Unaccustomed exercise consisting of eccentric (i.e., lengthening) muscle contractions often results in muscle damage characterized by ultrastructural alterations in muscle tissue, clinical signs and symptoms (e.g., reduced muscle strength and range of motion, increased muscle soreness and swelling, efflux of myocellular proteins). The time course of recovery following exercise-induced muscle damage depends on the extent of initial muscle damage, which in turn is influenced by the intensity and duration of exercise, joint angle/muscle length and muscle groups used during exercise...
December 29, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28027662/redox-control-of-skeletal-muscle-regeneration
#8
Emmeran Le Moal, Vincent Pialoux, Gaëtan Juban, Carole Groussard, Hassan Zouhal, Bénédicte Chazaud, Rémi Mounier
Skeletal muscle shows high plasticity in response to external demand. Moreover, adult skeletal muscle is capable of complete regeneration after injury, due to the properties of Muscle Stem Cells (MuSCs), the satellite cells, which follow a tightly regulated myogenic program to generate both new myofibers and new MuSCs for further needs. Whereas reactive oxygen species (ROS) and reactive nitrogen species (RNS) have long been associated with skeletal muscle physiology, their implication in the cell and molecular processes at work during muscle regeneration is more recent...
December 27, 2016: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28025376/local-and-generalized-endogenous-pain-modulation-in-healthy-men-effects-of-exercise-and-exercise-induced-muscle-damage
#9
Christopher D Black, Brandon K Tynes, Alexander R Gonglach, Dwight E Waddell
: Isometric exercise has been shown to activate endogenous pain inhibitory pathways in healthy adults, but not in some clinical pain populations. OBJECTIVE:  Exercise-induced muscle damage (EIMD) and the associated delayed-onset muscle soreness (DOMS) are a model for studying clinical pain; thus, our purpose was to examine the effects of isometric exercise on pressure pain threshold (PPT) in the presence and absence of DOMS. METHODS:  Data were collected on 23 males (22...
December 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28012598/mechanisms-underpinning-protection-against-eccentric-exercise-induced-muscle-damage-by-ischemic-preconditioning
#10
Alexander Franz, Michael Behringer, Kazunori Nosaka, Bettina Alexandra Buhren, Holger Schrumpf, Constantin Mayer, Christoph Zilkens, Moritz Schumann
Eccentric exercise training is effective for increasing muscle mass and strength, and improving insulin sensitivity and blood lipid profiles. However, potential muscle damage symptoms such as prolonged loss of muscle function and delayed onset of muscle soreness may restrict the use of eccentric exercise, especially in clinical populations. Therefore, strategies to reduce eccentric exercise-induced muscle damage (EIMD) are necessary, and an extensive number of scientific studies have tried to identify potential intervention modalities to perform eccentric exercises without adverse effects...
January 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/27983587/role-of-redox-signaling-and-inflammation-in-skeletal-muscle-adaptations-to-training
#11
REVIEW
Maria Carmen Gomez-Cabrera, Jose Viña, Li Li Ji
The inflammatory response to exercise-induced muscle damage has been extensively described. Exercise has important modulatory effects on immune function. These effects are mediated by diverse factors including pro-inflammatory cytokines, classical stress hormones, and hemodynamic effects leading to cell redistribution. As has been reported regarding oxidative stress, inflammation can have both detrimental and beneficial effects in skeletal muscle. In this review we will address the role of inflammation on protein metabolism in skeletal muscle...
December 13, 2016: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/27974950/evidence-of-a-redox-dependent-regulation-of-immune-responses-to-exercise-induced-inflammation
#12
Alexandra Sakelliou, Ioannis G Fatouros, Ioannis Athanailidis, Dimitrios Tsoukas, Athanasios Chatzinikolaou, Dimitris Draganidis, Athanasios Z Jamurtas, Christina Liacos, Ioannis Papassotiriou, Dimitrios Mandalidis, Kimon Stamatelopoulos, Meletios A Dimopoulos, Asimina Mitrakou
We used thiol-based antioxidant supplementation (n-acetylcysteine, NAC) to determine whether immune mobilisation following skeletal muscle microtrauma induced by exercise is redox-sensitive in healthy humans. According to a two-trial, double-blind, crossover, repeated measures design, 10 young men received either placebo or NAC (20 mg/kg/day) immediately after a muscle-damaging exercise protocol (300 eccentric contractions) and for eight consecutive days. Blood sampling and performance assessments were performed before exercise, after exercise, and daily throughout recovery...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27941488/no-differences-between-alter-g-trainer-and-active-and-passive-recovery-strategies-on-isokinetic-strength-systemic-oxidative-stress-and-perceived-muscle-soreness-after-exercise-induced-muscle-damage
#13
Matthew B Cooke, Carrie Nix, Lori Greenwood, Mike Greenwood
The incidence of muscle injuries is prevalent in elite sport athletes as well as weekend warriors and strategies that safely and effectively hasten recovery are highly desirable. The purpose of this study was to examine the differences between three recovery methods after eliciting muscle damage in recreationally active men relative to maximal isokinetic contractions, perceived muscle soreness and psychological mood states. Twenty-five recreationally active men (22.15±3.53yrs, 75.75±11.91kg, 180.52±7.3cm) were randomly matched by VO2 peak (53...
November 28, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27936249/the-impact-of-exercise-on-statin-associated-skeletal-muscle-myopathy
#14
Hae R Chung, Mayand Vakil, Michael Munroe, Alay Parikh, Benjamin M Meador, Pei T Wu, Jin H Jeong, Jeffrey A Woods, Kenneth R Wilund, Marni D Boppart
HMG-CoA reductase inhibitors (statins) are the most effective pharmacological means of reducing cardiovascular disease risk. The most common side effect of statin use is skeletal muscle myopathy, which may be exacerbated by exercise. Hypercholesterolemia and training status are factors that are rarely considered in the progression of myopathy. The purpose of this study was to determine the extent to which acute and chronic exercise can influence statin-induced myopathy in hypercholesterolemic (ApoE-/-) mice...
2016: PloS One
https://www.readbyqxmd.com/read/27936123/correction-myosin-light-chain-kinase-mlck-gene-influences-exercise-induced-muscle-damage-during-a-competitive-marathon
#15
Juan Del Coso, Marjorie Valero, Beatriz Lara, Juan José Salinero, César Gallo-Salazar, Francisco Areces
[This corrects the article DOI: 10.1371/journal.pone.0160053.].
2016: PloS One
https://www.readbyqxmd.com/read/27929385/the-metabolic-implications-of-glucocorticoids-in-a-high-fat-diet-setting-and-the-counter-effects-of-exercise
#16
REVIEW
Emily C Dunford, Michael C Riddell
Glucocorticoids (GCs) are steroid hormones, naturally produced by activation of the hypothalamic-pituitary-adrenal (HPA) axis, that mediate the immune and metabolic systems. Synthetic GCs are used to treat a number of inflammatory conditions and diseases including lupus and rheumatoid arthritis. Generally, chronic or high dose GC administration is associated with side effects such as steroid-induced skeletal muscle loss, visceral adiposity, and diabetes development. Patients who are taking exogenous GCs could also be more susceptible to poor food choices, but the effect that increasing fat consumption in combination with elevated exogenous GCs has only recently been investigated...
December 5, 2016: Metabolites
https://www.readbyqxmd.com/read/27913923/actn3-x-allele-carriers-had-greater-levels-of-muscle-damage-during-a-half-ironman
#17
Juan Del Coso, Juan José Salinero, Beatriz Lara, César Gallo-Salazar, Francisco Areces, Carlos Puente, David Herrero
PURPOSE: Alpha-actinin-3, encoded by the ACTN3 gene, is an actin-binding protein with an important role in myofibril contraction and muscle force output. In humans, there is a relatively common deficiency of the α-actinin-3 due to homozygosity in a polymorphism of the ACTN3 gene (R577X, rs1815739), that has been related to decreased resistance to strain during voluntary muscle contractions. The purpose of this study was to investigate the influence of the ACTN3 genotype on the level of exercise-induced muscle damage attained by 23 experienced triathletes during an official half-ironman competition...
December 2, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27912940/panax-ginseng-and-salvia-miltiorrhiza-supplementation-during-eccentric-resistance-training-in-middle-aged-and-older-adults-a-double-blind-randomized-control-trial
#18
Hsin-Fu Lin, Chun-Chung Chou, Hsiao-Han Chao, Hirofumi Tanaka
BACKGROUND: Muscle damage induced by an acute bout of eccentric exercise results in transient arterial stiffening. In this study, we sought to determine the effects of progressive eccentric resistance exercise training on vascular functions, and whether herb supplementation would enhance training adaptation by ameliorating the arterial stiffening effects. METHODS: By using a double-blinded randomized placebo-controlled design, older adults were randomly assigned to either the Panax ginseng and Salvia miltiorrhiza supplementation group (N=12) or the placebo group (N=11)...
December 2016: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/27911915/marathon-race-affects-neutrophil-surface-molecules-role-of-inflammatory-mediators
#19
Vinicius Coneglian Santos, Ana Paula Renno Sierra, Rodrigo Oliveira, Kim Guimarães Caçula, César Miguel Momesso, Fabio Takeo Sato, Maysa Braga Barros Silva, Heloisa Helena Oliveira, Maria Elizabeth Pereira Passos, Diego Ribeiro de Souza, Olivia Santos Gondim, Marino Benetti, Adriana Cristina Levada-Pires, Nabil Ghorayeb, Maria Augusta Peduti Dal Molin Kiss, Renata Gorjão, Tânia Cristina Pithon-Curi, Maria Fernanda Cury-Boaventura
The fatigue induced by marathon races was observed in terms of inflammatory and immunological outcomes. Neutrophil survival and activation are essential for inflammation resolution and contributes directly to the pathogenesis of many infectious and inflammatory conditions. The aim of this study was to investigate the effect of marathon races on surface molecules related to neutrophil adhesion and extrinsic apoptosis pathway and its association with inflammatory markers. We evaluated 23 trained male runners at the São Paulo International Marathon 2013...
2016: PloS One
https://www.readbyqxmd.com/read/27909227/castration-alters-protein-balance-following-high-frequency-muscle-contraction
#20
Jennifer L Steiner, David H Fukuda, Michael L Rossetti, Jay R Hoffman, Bradley S Gordon
Resistance exercise increases muscle mass by shifting protein balance in favor of protein accretion. Androgens independently alter protein balance, but it is unknown whether androgens alter this measure following resistance exercise. To answer this, male mice were subjected to sham or castration surgery 7-8 weeks prior to undergoing a bout of unilateral, high frequency, electrically induced muscle contractions in the fasted or refed state. Puromycin was injected 30 min prior to sacrifice to measure protein synthesis...
December 1, 2016: Journal of Applied Physiology
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