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Eccentric exercise

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https://www.readbyqxmd.com/read/28418696/eccentric-exercise-kinesiology-tape-and-balance-in-healthy-men
#1
Simona Hosp, Ramona Folie, Robert Csapo, Michael Hasler, Werner Nachbauer
CONTEXT:   Deficits in balance have been identified as a possible risk factor for knee injuries in athletes. Despite a lack of evidence for its effectiveness, kinesiology tape (KT) is widely used to prevent knee injuries. OBJECTIVE:   To investigate the influence of KT at the knee joint on balance ability in healthy men after eccentric exercise. DESIGN:   Crossover study. SETTING:   University laboratory. PATIENTS OR OTHER PARTICIPANTS:   Twelve young men with no history of lower limb injury volunteered for the study (age = 23...
April 18, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28417082/improving-glucose-tolerance-by-muscle-damaging-exercise
#2
Chien-Te Ho, Machiko Otaka, Chia-Hua Kuo
Tissue damage is regarded as an unwanted medical condition to be avoided. However, introducing tolerable tissue damages has been used as a therapeutic intervention in traditional and complementary medicine to cure discomfort and illness. Eccentric exercise is known to cause significant necrosis and insulin resistance of skeletal muscle. The purpose of this study was to determine the magnitude of muscle damage and blood glucose responses during an oral glucose tolerance test (OGTT) after eccentric training in 21 young participants...
April 2017: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/28414268/shifting-the-current-clinical-perspective-isolated-eccentric-exercise-as-an-effective-intervention-to-promote-the-recovery-of-muscle-after-injury
#3
Lindsey K Lepley, Timothy A Butterfield
Eccentric exercise is able to mechanically engage muscle, initiating strain-sensing molecules that promote muscle recovery by inducing beneficial adaptations in neural activity and muscle morphology, 2 critical components of muscle function that are negatively altered after injury. However, due to misinterpreted mathematic modeling and in situ and in vitro stretch protocols, a dogma that exposing muscle to eccentric exercise is associated with injury has been perpetuated in the literature. In response, clinicians have been biased toward using concentric exercise postinjury to improve the recovery of muscle function...
April 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28414265/effectiveness-of-a-home-based-eccentric-exercise-program-on-the-torque-angle-relationship-of-the-shoulder-external-rotators-a-pilot-study
#4
Timothy L Uhl, Thomas Rice, Brianna Papotto, Timothy A Butterfield
CONTEXT: The role of the rotator cuff is to provide dynamic stability to the glenohumeral joint. Human and animal studies have identified sarcomerogenesis as an outcome of eccentric training indicated by more torque generation with the muscle in a lengthened position. OBJECTIVE: The authors hypothesized that a home-based eccentric-exercise program could increase the shoulder external rotators' eccentric strength at terminal internal rotation (IR). DESIGN: Prospective case series...
April 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28400506/acute-elevations-in-serum-hormones-are-attenuated-after-chronic-training-with-traditional-isoinertial-but-not-accentuated-eccentric-loads-in-strength-trained-men
#5
Simon Walker, Keijo Häkkinen, Guy Gregory Haff, Anthony J Blazevich, Robert U Newton
It has been proposed that the maintenance of acute hormonal responses reveal an efficacy of a training stimulus to evoke ongoing increases in strength and muscle mass. We previously observed that maximum strength continued to improve throughout a 10-week period in an accentuated eccentric loading group (AEL) but not a traditional isoinertial loading (ISO) group. Therefore, this study investigated whether the magnitude of acute hormonal responses was greater (i.e., maintained) in AEL compared to ISO at the end of the training period...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28391765/the-efficacy-of-cooling-with-phase-change-material-for-the-treatment-of-exercise-induced-muscle-damage-pilot-study
#6
Susan Y Kwiecien, Malachy P McHugh, Glyn Howatson
Post-exercise cryotherapy treatments are typically short duration interventions. This study examined the efficacy of prolonged cooling using phase change material (PCM) on strength loss and pain after eccentric exercise. Eight adults performed 120 bilateral eccentric quadriceps contractions (90% MVC). Immediately afterwards, frozen PCM packs (15°C) were placed over the quadriceps, with room temperature PCM packs on the contralateral quadriceps. Skin temperature was recorded continually (6 h PCM application)...
April 10, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28386694/effect-of-alcohol-after-muscle-damaging-resistance-exercise-on-muscular-performance-recovery-and-inflammatory-capacity-in-women
#7
Danielle E Levitt, Hui-Ying Luk, Anthony A Duplanty, Brian K McFarlin, David W Hill, Jakob L Vingren
PURPOSE: To investigate the effect of acute alcohol consumption on muscular performance recovery, assessed by maximal torque production, and on inflammatory capacity, assessed by lipopolysaccharide (LPS)-stimulated cytokine production, following muscle-damaging resistance exercise in women. METHODS: Thirteen recreationally resistance-trained women completed two identical exercise bouts (300 maximal single-leg eccentric leg extensions) followed by alcohol (1.09 g ethanol kg(-1) fat-free body mass) or placebo ingestion...
April 6, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28385560/skeletal-muscle-functional-and-structural-adaptations-after-eccentric-overload-flywheel-resistance-training-a-systematic-review-and-meta-analysis
#8
REVIEW
Sergio Maroto-Izquierdo, David García-López, Rodrigo Fernandez-Gonzalo, Osvaldo C Moreira, Javier González-Gallego, José A de Paz
OBJECTIVES: The purpose of this meta-analysis was to examine the effect of flywheel (FW) resistance training with Eccentric Overload (FW-EOT) on muscle size and functional capacities (i.e. strength and power) in athletes and healthy subjects, and to compare FW-induced adaptations with those triggered by traditional resistance exercise interventions. DESIGN: A systematic review and meta-analysis of randomised controlled trials. METHODS: A search of electronic databases [PubMed, MEDLINE (SportDiscus), Web of Science, Scopus and PEDro] was conducted to identify all publications employing FW-EOT up to April 30, 2016...
March 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28381470/evidence-supporting-the-existence-of-a-distinct-obese-phenotype-of-heart-failure-with-preserved-ejection-fraction
#9
Masaru Obokata, Yogesh N V Reddy, Sorin V Pislaru, Vojtech Melenovsky, Barry A Borlaug
Background -Heart failure (HF) with preserved ejection fraction (HFpEF) is a heterogeneous syndrome. Phenotyping patients into pathophysiologically homogenous groups may enable better targeting of treatment. Obesity is common in HFpEF and has many cardiovascular effects, suggesting it may be a viable candidate for phenotyping. We compared cardiovascular structure, function, and reserve capacity in subjects with obese HFpEF, non-obese HFpEF, and controls. Methods -Subjects with obese HFpEF (BMI≥35kg/m(2), n=99), non-obese HFpEF (BMI<30kg/m(2), n=96), and non-obese controls free of HF (n=71) underwent detailed clinical assessment, echocardiography and invasive hemodynamic exercise testing...
April 5, 2017: Circulation
https://www.readbyqxmd.com/read/28379908/effects-of-long-term-high-load-exercise-on-the-anatomy-of-the-hip-joints-a-preliminary-report
#10
Yawei Song, Xiyuan Zhang, Ke Rong
The aim of this study was to assess the impact of different sports on hip joint anatomic parameters in athletes. This was a cross-sectional study of eight male trampolinists, eight male weightlifters, and eight male volunteers enrolled in July 2014. Hip joint anatomic parameters were measured from plain radiographs taken at the level of the lesser trochanter center. Data were compared between groups using the χ-test or one-way analysis of variance with the Bonferroni post-hoc test. There were no significant differences among groups in age, height, or weight...
April 4, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28353212/stress-induced-alteration-of-left-ventricular-eccentricity-an-additional-marker-of-multivessel-cad
#11
Alessia Gimelli, Riccardo Liga, Assuero Giorgetti, Mirta Casagranda, Paolo Marzullo
BACKGROUND: Abnormal left ventricular (LV) eccentricity index (EI) is a marker of adverse cardiac remodeling. However, the interaction between stress-induced alterations of EI and major cardiac parameters has not been explored. We sought to evaluate the relationship between LV EI and coronary artery disease (CAD) burden in patients submitted to myocardial perfusion imaging (MPI). METHODS AND RESULTS: Three-hundred and forty-three patients underwent MPI and coronary angiography...
March 28, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28344449/the-effects-of-3-weeks-of-uphill-and-downhill-walking-on-blood-lipids-and-glucose-metabolism-in-pre-diabetic-men-a-pilot-study
#12
Marc Philippe, Hannes Gatterer, Erika Maria Eder, Alexander Dzien, Matthias Somavilla, Andreas Melmer, Christoph Ebenbichler, Tom Müller, Martin Burtscher
The prevention of type 2 diabetes in persons at risk for diabetes is of utmost importance. Physical activity in general and even exercises at moderate intensities such as walking significantly reduce the risk of the development of type 2 diabetes. However, it is still a matter of debate whether lipids and glucose metabolism are differently affected by regular concentric (e.g., uphill walking) and eccentric (e.g., downhill walking) endurance exercise. The aim of this study was to investigate the effects of short-term (3 weeks) uphill and downhill walking on glucose metabolism and blood lipids in pre-diabetic middle-aged men in a real world setting...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28344445/effects-of-static-and-dynamic-stretching-on-the-isokinetic-peak-torques-and-electromyographic-activities-of-the-antagonist-muscles
#13
Abdullah Serefoglu, Ufuk Sekir, Hakan Gür, Bedrettin Akova
The aim of this study was to investigate if static and dynamic stretching exercises of the knee muscles (quadriceps and hamstring muscles) have any effects on concentric and eccentric isokinetic peak torques and electromyographic amplitudes (EMG) of the antagonist muscles. Twenty healthy male athletes (age between 18-30 years) voluntarily participated in this study. All of the subjects visited the laboratory to complete the following intervention in a randomized order on 5 separate days; (a) non-stretching (control), (b) static stretching of the quadriceps muscles, (c) static stretching of the hamstring muscles, (d) dynamic stretching of the quadriceps muscles, and (e) dynamic stretching of the hamstring muscles...
March 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28324168/the-effect-of-eccentric-exercise-with-blood-flow-restriction-on-neuromuscular-activation-microvascular-oxygenation-and-the-repeated-bout-effect
#14
Jakob D Lauver, Trent E Cayot, Timothy Rotarius, Barry W Scheuermann
PURPOSE: To examine the effect of low-intensity eccentric contractions with and without blood flow restriction (BFR) on microvascular oxygenation, neuromuscular activation, and the repeated bout effect (RBE). METHODS: Participants were randomly assigned to either low-intensity (LI), low-intensity with BFR (LI-BFR), or a control (CON) group. Participants in LI and LI-BFR performed a preconditioning bout of low-intensity eccentric exercise prior to about of maximal eccentric exercise...
March 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28322596/motor-imagery-during-action-observation-increases-eccentric-hamstring-force-an-acute-non-physical-intervention
#15
Matthew Scott, Stephen Taylor, Paul Chesterton, Stefan Vogt, Daniel Lloyd Eaves
PURPOSE: Rehabilitation professionals typically use motor imagery (MI) or action observation (AO) to increase physical strength for injury prevention and recovery. Here we compared hamstring force gains for MI during AO (AO + MI) against two pure MI training groups. MATERIALS AND METHODS: Over a 3-week intervention physically fit adults imagined Nordic hamstring exercises in both legs and synchronized this with a demonstration of the same action (AO + MI), or they purely imagined this action (pure MI), or imagined upper-limb actions (pure MI-control)...
March 21, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28320258/sex-differences-in-oxidative-stress-after-eccentric-and-concentric-exercise
#16
Magdalena Wiecek, Marcin Maciejczyk, Jadwiga Szymura, Zbigniew Szygula
OBJECTIVES: Comparison of redox balance changes in the blood of women and men as a result of submaximal eccentric (ECC) and concentric (CONC) efforts. METHODS: 10 women and 10 men performed three 45-minute submaximal treadmill runs at constant velocities (downhill run - ECC, uphill run - CONC and level run). Prior to the 45-minute exercises, after their completion and following 24 hours of recovery, the concentration of lactate, oxidized low-density lipoprotein (ox-LDL), 3-nitrotyrosine, uric acid (UA) and the white blood cell count (WBC), neutrophil (NEUT), lymphocyte (LYMPH) and monocyte content in the blood were determined...
March 20, 2017: Redox Report: Communications in Free Radical Research
https://www.readbyqxmd.com/read/28319422/phototherapy-for-improvement-of-performance-and-exercise-recovery-comparison-of-3-commercially-available-devices
#17
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/28316572/eccentric-ergometer-training-promotes-locomotor-muscle-strength-but-not-mitochondrial-adaptation-in-patients-with-severe-chronic-obstructive-pulmonary-disease
#18
Norah J MacMillan, Sophia Kapchinsky, Yana Konokhova, Gilles Gouspillou, Riany de Sousa Sena, R Thomas Jagoe, Jacinthe Baril, Tamara E Carver, Ross E Andersen, Ruddy Richard, Hélène Perrault, Jean Bourbeau, Russell T Hepple, Tanja Taivassalo
Eccentric ergometer training (EET) is increasingly being proposed as a therapeutic strategy to improve skeletal muscle strength in various cardiorespiratory diseases, due to the principle that lengthening muscle actions lead to high force-generating capacity at low cardiopulmonary load. One clinical population that may particularly benefit from this strategy is chronic obstructive pulmonary disease (COPD), as ventilatory constraints and locomotor muscle dysfunction often limit efficacy of conventional exercise rehabilitation in patients with severe disease...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28315596/effects-of-hip-and-trunk-muscle-strengthening-on-hip-function-and-lower-limb-kinematics-during-step-down-task
#19
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/28314091/changes-in-muscle-architecture-of-biceps-femoris-induced-by-eccentric-strength-training-with-nordic-hamstring-exercise
#20
D Alonso-Fernandez, P Docampo-Blanco, J 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
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