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"Blood flow restriction"

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https://www.readbyqxmd.com/read/28706859/role-of-metabolic-stress-for-enhancing-muscle-adaptations-practical-applications
#1
REVIEW
Marcelo Conrado de Freitas, Jose Gerosa-Neto, Nelo Eidy Zanchi, Fabio Santos Lira, Fabrício Eduardo Rossi
Metabolic stress is a physiological process that occurs during exercise in response to low energy that leads to metabolite accumulation [lactate, phosphate inorganic (Pi) and ions of hydrogen (H(+))] in muscle cells. Traditional exercise protocol (i.e., Resistance training) has an important impact on the increase of metabolite accumulation, which influences hormonal release, hypoxia, reactive oxygen species (ROS) production and cell swelling. Changes in acute exercise routines, such as intensity, volume and rest between sets, are determinants for the magnitude of metabolic stress, furthermore, different types of training, such as low-intensity resistance training plus blood flow restriction and high intensity interval training, could be used to maximize metabolic stress during exercise...
June 26, 2017: World Journal of Methodology
https://www.readbyqxmd.com/read/28704612/blood-flow-in-humans-following-low-load-exercise-with-and-without-blood-flow-restriction
#2
J Grant Mouser, Gilberto C Laurentino, Scott J Dankel, Samuel L Buckner, Matthew B Jessee, Brittany R Counts, Kevin T Mattocks, Jeremy P Loenneke
Blood flow restriction (BFR) in combination with exercise has been used to increase muscle size and strength using relatively low loads (20%-30% 1RM). In research, the range of applied pressures based on a percentage of arterial occlusion pressure (AOP), is wide. PURPOSE: To measure the blood flow response before, following each set of exercise, and post exercise to low-load elbow flexion combined with no restriction (NOBFR), 40% of AOP (40BFR), and 80% of AOP (80BFR). METHODS: 152 participants volunteered; 140 completed the protocol (women=75, men=65)...
July 13, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28685423/dorsiflexor-muscle-oxygenation-during-low-moderate-and-submaximal-sustained-isometric-contraction
#3
Adkham Paiziev, Martin Wolf, Fikrat Kerimov
Sustained isometric contractions of skeletal muscles produce intramuscular pressures that lead to blood flow restriction. Thus, we have the paradox of rising O2 demand due to muscle activity and at the same time reduced blood flow. The aim was to assess muscle oxygenation during sustained isometric low (30%), moderate (60%) and submaximal [90% of maximal voluntary contraction (MVC)] contraction of the dorsiflexor muscle. Experiments were conducted on the dominant (right) leg of 8 male students (age 19 ± 2 years, weight 75 ± 6 kg)...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28682937/effects-of-blood-flow-restriction-combined-with-post-activation-potentiation-stimuli-on-jump-performance-in-recreationally-active-males
#4
Ryan M Miller, Victoria M Keeter, Eduardo D S Freitas, Aaron D Heishman, Allen W Knehans, Debra A Bemben, Michael G Bemben
Whole-body vibration and maximum voluntary contractions combined with blood flow restriction to augment post-activation potentiation have yet to be examined. Therefore, the purpose of this investigation was to examine the augmented effects of post-activation potentiation when whole-body vibration and maximum voluntary contraction are combined with blood-flow restriction. Twenty men (21.8 ± 2.6 years, 180.5 ± 6.2 cm and 84.5 ± 12.1 kg) completed the study. Participants completed three testing sessions in a randomized design that included one of the following: 1) control (CON), 2) whole-body vibration (WBV) and whole-body vibration combined with blood flow restriction (WBV+BFR), or 3) maximum voluntary contraction (MVC) and maximum voluntary contraction combined with blood-flow restriction (MVC+BFR)...
July 3, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28651256/the-cardiovascular-and-perceptual-response-to-very-low-load-blood-flow-restricted-exercise
#5
Matthew B Jessee, Scott J Dankel, Samuel L Buckner, J Grant Mouser, Kevin T Mattocks, Jeremy P Loenneke
This study sought to compare cardiovascular and perceptual responses to blood flow restriction (BFR) exercise using various pressure and load combinations. Fourteen participants completed four sets of BFR elbow flexion using 10, 15 and 20% 1RM with 40 and 80% arterial occlusion pressure (AOP). AOP was measured before and after exercise. Perceived exertion (RPE) and discomfort were assessed before exercise and after each set. Data presented as mean (95% CI), except for RPE and discomfort: 25(th), 50(th), 75(th) percentiles...
July 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28643221/post-exercise-blood-flow-restriction-attenuates-hyperemia-similarly-in-males-and-females
#6
Scott J Dankel, J Grant Mouser, Matthew B Jessee, Kevin T Mattocks, Samuel L Buckner, Jeremy P Loenneke
PURPOSE: Our laboratory recently demonstrated that post-exercise blood flow restriction attenuated muscle hypertrophy only in females, which we hypothesized may be due to alterations in post-exercise blood flow. The aim of this study is to test our previous hypothesis that sex differences in blood flow would exist when employing the same protocol. METHODS: Twenty-two untrained individuals (12 females; 10 males) performed two exercise sessions, each involving one set of elbow flexion exercise to volitional failure on the right arm...
August 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28642225/blood-flow-restriction-training-a-novel-approach-to-augment-clinical-rehabilitation-how-to-do-it
#7
EDITORIAL
Stephen D Patterson, Luke Hughes, Paul Head, Stuart Warmington, Christopher Brandner
No abstract text is available yet for this article.
June 22, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28571673/a-toe-flexion-nirs-assisted-test-for-rapid-assessment-of-foot-perfusion-in-peripheral-arterial-disease-feasibility-validity-and-diagnostic-accuracy
#8
F Manfredini, N Lamberti, T Rossi, F Mascoli, N Basaglia, P Zamboni
OBJECTIVES: Feasibility, validity, and diagnostic accuracy of a non-invasive dynamic ambulatory test were assessed with near infrared spectroscopy (NIRS) evaluating foot perfusion in peripheral arterial disease (PAD). METHODS: This was a prospective observational study. Eighty PAD patients (63 males, 71 ± 9 years), including 41 patients with coexisting diabetes, participated. Thirteen healthy subjects (8 males, 26 ± 8 years) were also studied by echo colour Doppler providing 160 diseased and 26 non-diseased limbs...
May 29, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28513326/the-effects-of-blood-flow-restricted-electrostimulation-on-strength-hypertrophy
#9
Joshua Slysz, Jamie F Burr
CONTEXT: The combined effect of neuromuscular electrical muscle stimulation (NMES) and blood flow restriction (BFR) on muscle mass and strength has not been thoroughly investigated. OBJECTIVE: To examine the effects of combined and independent BFR and a low-intensity NMES on skeletal muscle adaptation. DESIGN: Exploratory Study. SETTING: Laboratory. PARTICIPANTS: Twenty recreationally active subjects...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28502262/effects-of-combined-iugr-and-prenatal-stress-on-the-development-of-the-hippocampus-in-a-fetal-guinea-pig-model
#10
A L Cumberland, H K Palliser, P Rani, D W Walker, J J Hirst
Intrauterine growth restriction (IUGR) and maternal stress during pregnancy are two compromises that negatively impact neurodevelopment and increase the risk of developing later life neuropsychiatric disorders such as schizophrenia, depression and behavioural disorders. Neurosteroids, particularly allopregnanolone, are important in protecting the developing brain and promoting many essential neurodevelopmental processes. Individually, IUGR and prenatal stress (PS) reduce myelination and neurogenesis within affected fetal brains, however less information is available on the combined effects of these two disorders on the term fetal brain...
May 15, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28501908/a-tale-of-three-cuffs-the-hemodynamics-of-blood-flow-restriction
#11
J Grant Mouser, Scott J Dankel, Matthew B Jessee, Kevin T Mattocks, Samuel L Buckner, Brittany R Counts, Jeremy P Loenneke
INTRODUCTION: The blood flow response to relative levels of blood flow restriction (BFR) across varying cuff widths is not well documented. With the variety of cuff widths and pressures reported in the literature, the effects of different cuffs and pressures on blood flow require investigation. PURPOSE: To measure blood pressure using three commonly used BFR cuffs, examine possible venous/arterial restriction pressures, and measure hemodynamic responses to relative levels of BFR using these same cuffs...
May 13, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28500081/quadriceps-strengthening-with-and-without-blood-flow-restriction-in-the-treatment-of-patellofemoral-pain-a-double-blind-randomised-trial
#12
Lachlan Giles, Kate E Webster, Jodie McClelland, Jill L Cook
BACKGROUND: Quadriceps strengthening exercises are part of the treatment of patellofemoral pain (PFP), but the heavy resistance exercises may aggravate knee pain. Blood flow restriction (BFR) training may provide a low-load quadriceps strengthening method to treat PFP. METHODS: Seventy-nine participants were randomly allocated to a standardised quadriceps strengthening (standard) or low-load BFR. Both groups performed 8 weeks of leg press and leg extension, the standard group at 70% of 1 repetition maximum (1RM) and the BFR group at 30% of 1RM...
May 12, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28488836/effects-of-low-load-resistance-exercise-with-blood-flow-restriction-on-intramuscular-hemodynamics-oxygenation-level-and-water-content
#13
Osamu Yanagisawa, Atsuki Fukutani
BACKGROUND: Muscle metabolism during and after low-load blood flow restriction (BFR) exercise should be further investigated to clarify the mechanism by which the exercise leads to muscle hypertrophy, and increases strength and endurance. We aimed to investigate the effects of low-load resistance exercise with BFR on intramuscular hemodynamics, oxygenation level, and water content. METHODS: Seven men performed ankle plantar flexion exercise (120 repetitions, 30% one repetition maximum) using a custom-made device with and without BFR inside a magnetic resonance scanner...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28483555/blood-flow-restriction-walking-and-physical-function-in-older-adults-a-randomized-control-trial
#14
Matthew John Clarkson, Louise Conway, Stuart Anthony Warmington
OBJECTIVES: The progressive age-related declines in muscle health and physical function in older adults are related to muscle size and strength. Walking with an applied blood flow restriction is an alternative to maintain muscle volume in older adults to increase the value for time spent walking. Therefore, the aim of this study was to examine the effect of adding blood flow restriction to low-intensity walking on clinical measures of physical function. DESIGN/METHODS: Sedentary older men and women were randomised to either a low-intensity blood flow restriction walking group (BFRW; n=10), or a non-blood flow restriction walking control group (CON; n=9)...
April 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28481416/blood-flow-restricted-training-leads-to-myocellular-macrophage-infiltration-and-upregulation-of-heat-shock-proteins-but-no-apparent-muscle-damage
#15
Jakob L Nielsen, Per Aagaard, Tatyana A Prokhorova, Tobias Nygaard, Rune D Bech, Charlotte Suetta, Ulrik Frandsen
KEY POINTS: Muscular contractions performed using a combination of low external loads and partial restriction of limb blood flow appear to induce substantial gains in muscle strength and muscle mass. This exercise regime may initially induce muscular stress and damage; however, the effects of a period of blood flow restricted training on these parameters remain largely unknown. The present study shows that short-term, high-frequency, low-load muscle training performed with partial blood flow restriction does not induce significant muscular damage...
July 15, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28451748/effects-of-4%C3%A2-weeks-of-low-load-unilateral-resistance-training-with-and-without-blood-flow-restriction-on-strength-thickness-v-wave-and-h-reflex-of-the-soleus-muscle-in-men
#16
David Colomer-Poveda, Salvador Romero-Arenas, Antonio Vera-Ibáñez, Manuel Viñuela-García, Gonzalo Márquez
PURPOSE: To test the effects of 4 weeks of unilateral low-load resistance training (LLRT), with and without blood flow restriction (BFR), on maximal voluntary contraction (MVC), muscle thickness, volitional wave (V wave), and Hoffmann reflex (H reflex) of the soleus muscle. METHODS: Twenty-two males were randomly distributed into three groups: a control group (CTR; n = 8); a low-load blood flow restriction resistance training group (BFR-LLRT; n = 7), who were an inflatable cuff to occlude blood flow; and a low-load resistance training group without blood flow restriction (LLRT; n = 7)...
April 27, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28448687/postexercise-blood-flow-restriction-does-not-enhance-muscle-hypertrophy-induced-by-multiple-set-high-load-resistance-exercise
#17
Haruhiko Madarame, Satoshi Nakada, Takahisa Ohta, Naokata Ishii
To test the applicability of postexercise blood flow restriction (PEBFR) in practical training programmes, we investigated whether PEBFR enhances muscle hypertrophy induced by multiple-set high-load resistance exercise (RE). Seven men completed an eight-week RE programme for knee extensor muscles. Employing a within-subject design, one leg was subjected to RE + PEBFR, whereas contralateral leg to RE only. On each exercise session, participants performed three sets of unilateral knee extension exercise at approximately 70% of their one-repetition maximum for RE leg first, and then performed three sets for RE + PEBFR leg...
April 27, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28444936/blood-flow-restriction-attenuates-eccentric-exercise-induced-muscle-damage-without-perceptual-and-cardiovascular-overload
#18
Victor M Curty, Alexandre B Melo, Leonardo C Caldas, Lucas Guimarães-Ferreira, Nuno F de Sousa, Paula F Vassallo, Elisardo C Vasquez, Valério G Barauna
The aim of this study was to evaluate the acute effects of high-intensity eccentric exercise (HI-ECC) combined with blood flow restriction (BFR) on muscle damage markers, and perceptual and cardiovascular responses. Nine healthy men (26 ± 1 years, BMI 24 ± 1 kg m(-) ²) underwent unilateral elbow extension in two conditions: without (HI-ECC) and with BFR (HI-ECC+BFR). The HI-ECC protocol corresponded to three sets of 10 repetitions with 130% of maximal strength (1RM). The ratings of perceived exertion (RPE) and pain (RPP) were measured after each set...
April 26, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28416903/effects-of-strength-training-with-blood-flow-restriction-on-torque-muscle-activation-and-local-muscular-endurance-in-healthy-subjects
#19
Jbc Sousa, G R Neto, H H Santos, J P Araújo, H G Silva, M S Cirilo-Sousa
The present study aimed to analyse the effects of six weeks of strength training (ST), with and without blood flow restriction (BFR), on torque, muscle activation, and local muscular endurance (LME) of the knee extensors. Thirty-seven healthy young individuals were divided into four groups: high intensity (HI), low intensity with BFR (LI+BFR), high intensity and low intensity + BFR (COMB), and low intensity (LI). Torque, muscle activation and LME were evaluated before the test and at the 2(nd), 4(th) and 6(th) weeks after exercise...
March 2017: Biology of Sport
https://www.readbyqxmd.com/read/28402045/brachial-blood-flow-under-relative-levels-of-blood-flow-restriction-is-decreased-in-a-nonlinear-fashion
#20
J Grant Mouser, Carl J Ade, Christopher D Black, Debra A Bemben, Michael G Bemben
INTRODUCTION: Blood flow restriction (BFR), the application of external pressure to occlude venous return and restrict arterial inflow, has been shown to increase muscular size and strength when combined with low-load resistance exercise. BFR in the research setting uses a wide range of pressures, applying a pressure based upon an individual's systolic pressure or a percentage of occlusion pressure; not a directly determined reduction in blood flow. The relationship between relative pressure and blood flow has not been established...
April 12, 2017: Clinical Physiology and Functional Imaging
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