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https://www.readbyqxmd.com/read/28433473/sex-difference-in-the-heat-shock-response-to-high-external-load-resistance-training-in-older-humans
#1
Rose Njemini, Louis Nuvagah Forti, Tony Mets, Evelien Van Roie, Walter Coudyzer, Ingo Beyer, Christophe Delecluse, Ivan Bautmans
BACKGROUND: Literature reports on the effects of resistance training on heat shock protein70 (Hsp70) adaptation in older subjects are scarce. Moreover, the optimum training load required to obtain a beneficial adaptation profile is lacking. Therefore, the aim of this study was to determine the effects of resistance training at various external loads on extracellular Hsp70 (eHsp70) resting levels in older humans. METHODS: Fifty-six community-dwelling older (68±5years) volunteers were randomized to 12weeks of resistance training (3×/week) at either high-resistance (HIGH, 8 males, 10 females, 2×10-15 repetitions at 80%1RM), low resistance (LOW, 9 Males, 10 Females, 1×80-100 repetitions at 20%1RM), or mixed low resistance (LOW+, 9 Males, 10 Females, 1×60 repetitions at 20%1RM followed by 1×10-20 repetitions at 40%1RM)...
April 19, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28432606/neuromuscular-electrostimulation-a-new-therapeutic-option-to-improve-radio-cephalic-arteriovenous-fistula-maturation-in-end-stage-chronic-kidney-disease-patients
#2
Lucia Martinez, Vicent Esteve, Montserrat Yeste, Vicent Artigas, Secundino Llagostera
BACKGROUND: Radio-cephalic arteriovenous fistula (RCAVF) is the gold standard vascular access for end-stage chronic kidney disease patients. Exercises after arteriovenous fistula (AVF) creation improve maturation. No articles are published regarding neuromuscular electrostimulation (NMES) in AVF maturation. OBJECTIVES: To assess the usefulness of a NMES programme on RCAVF maturation process. METHODS: An 8-week single-centre prospective study...
April 21, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28432420/sex-differences-in-neuromuscular-function-after-repeated-eccentric-contractions-of-the-knee-extensor-muscles
#3
Andrea Lee, Jake Baxter, Claire Eischer, Matt Gage, Sandra Hunter, Tejin Yoon
PURPOSE: This study examined the mechanisms for force and power reduction during and up to 48 h after maximal eccentric contractions of the knee extensor muscles in young men and women. METHODS: 13 men (22.8 ± 2.6 years) and 13 women (21.6 ± 2.2 years) performed 150 maximal effort eccentric contractions (5 sets of 30) with the knee extensor muscles at 60° s(-1). Maximal voluntary isometric contractions (MVIC) and maximal voluntary concentric contractions (MVCC) were performed before and after the 150 eccentric contractions...
April 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28431747/effects-of-vibration-training-in-reducing-risk-of-slip-related-falls-among-young-adults-with-obesity
#4
Feng Yang, Jose Munoz, Long-Zhu Han, Fei Yang
This study examined the effects of controlled whole-body vibration training on reducing risk of slip-related falls in people with obesity. Twenty-three young adults with obesity were randomly assigned into either the vibration or placebo group. The vibration and placebo groups respectively received 6-week vibration and placebo training on a side-alternating vibration platform. Before and after the training, the isometric knee extensors strength capacity was measured for the two groups. Both groups were also exposed to a standardized slip induced by a treadmill during gait prior to and following the training...
April 9, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28422532/effects-of-post-exercise-protein-intake-on-muscle-mass-and-strength-during-resistance-training-is-there-an-optimal-ratio-between-fast-and-slow-proteins
#5
Marina Fabre, Christophe Hausswirth, Eve Tiollier, Odeline Molle, Julien Louis, Alexandre Durguerian, Nathalie Neuveux, Xavier Bigard
While effects of the two classes of proteins found in milk (i.e. soluble proteins, including whey, and casein) on muscle protein synthesis have been well investigated after a single bout of resistance exercise (RE), the combined effects of these two proteins on the muscle responses to resistance training (RT) have not yet been investigated. Therefore, the aim of this study was to examine the effects of protein supplementation varying by the ratio between milk soluble proteins (fast-digested protein) and casein (slow-digested protein) on the muscle to a 9-week RT program...
April 19, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28421126/femoral-neck-strain-during-maximal-contraction-of-isolated-hip-spanning-muscle-groups
#6
Saulo Martelli
The aim of the study was to investigate femoral neck strain during maximal isometric contraction of the hip-spanning muscles. The musculoskeletal and the femur finite-element models from an elderly white woman were taken from earlier studies. The hip-spanning muscles were grouped by function in six hip-spanning muscle groups. The peak hip and knee moments in the model were matched to corresponding published measurements of the hip and knee moments during maximal isometric exercises about the hip and the knee in elderly participants...
2017: Computational and Mathematical Methods in Medicine
https://www.readbyqxmd.com/read/28418751/influence-of-exergaming-on-the-perception-of-cancer-related-fatigue
#7
Ricardo da Silva Alves, Denise Hollanda Iunes, Isabela Carvalho Pereira, Juliana Bassalobre Carvalho Borges, Denismar Alves Nogueira, Andreia Maria Silva, Daniel Ferreira Moreira Lobato, Leonardo Cesar Carvalho
OBJECTIVE: Exercise is recommended for cancer patients to reduce fatigue and improve quality of life. This study's aim is to evaluate the influence of an exergaming protocol on cancer-related fatigue, muscle fatigue, and muscle strength in cancer patients. MATERIALS AND METHODS: We conducted a quasi-experimental control study using exergaming in all groups through an Xbox360 Kinect™ console, two to three times per week, for 20 sessions. Three groups were created: cancer patients in chemotherapy and/or radiotherapy group (CRG; n:15), cancer patients after chemotherapy and/or radiotherapy (CAG; n:15), and a control group (CG; n:15)...
April 2017: Games for Health
https://www.readbyqxmd.com/read/28417202/cardiorespiratory-fitness-and-muscle-strength-in-pancreatic-cancer-patients
#8
Dorothea Clauss, Christine Tjaden, Thilo Hackert, Lutz Schneider, Cornelia M Ulrich, Joachim Wiskemann, Karen Steindorf
PURPOSE: Cancer patients frequently experience reduced physical fitness due to the disease itself as well as treatment-related side effects. However, studies on physical fitness in pancreatic cancer patients are missing. Therefore, we assessed cardiorespiratory fitness and muscle strength of pancreatic cancer patients. METHODS: We included 65 pancreatic cancer patients, mostly after surgical resection. Cardiorespiratory fitness was assessed using cardiopulmonary exercise testing (CPET) and 6-min walk test (6MWT)...
April 17, 2017: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
https://www.readbyqxmd.com/read/28417093/instability-resistance-training-for-health-and-performance
#9
REVIEW
Erika Zemková
Recently, resistance exercises performed on an unstable surface have become part of athletic training and rehabilitation. Accordingly, their role in performance and health-oriented strength training has increasingly emerged as a matter of interest to researchers and conditioning specialists. A more pronounced activation of stabilizing muscles is assumed to be the main feature of instability resistance exercises. This assumption has been proven by EMG studies, which have highlighted significantly greater electromyographic activity of trunk-stabilizing muscles during exercises under unstable as compared to stable conditions...
April 2017: Journal of Traditional and Complementary Medicine
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
#10
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
#11
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/28393555/examining-the-relationship-between-endogenous-pain-modulation-capacity-and-endurance-exercise-performance
#12
Andrew Flood, Gordon Waddington, Stuart Cathcart
The aim of the current study was to examine the relationship between pain modulatory capacity and endurance exercise performance. Twenty-seven recreationally active males between 18 and 35 years of age participated in the study. Pain modulation was assessed by examining the inhibitory effect of a noxious conditioning stimulus (cuff occlusion) on the perceived intensity of a second noxious stimulus (pressure pain threshold). Participants completed two, maximal voluntary contractions followed by a submaximal endurance time task...
April 10, 2017: Research in Sports Medicine
https://www.readbyqxmd.com/read/28391765/the-efficacy-of-cooling-with-phase-change-material-for-the-treatment-of-exercise-induced-muscle-damage-pilot-study
#13
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/28391722/eversion-strength-and-surface-electromyography-measures-with-and-without-chronic-ankle-instability-measured-in-2-positions
#14
Lindsy Donnelly, Luke Donovan, Joseph M Hart, Jay Hertel
BACKGROUND: Individuals with chronic ankle instability (CAI) have demonstrated strength deficits compared to healthy controls; however, the influence of ankle position on force measures and surface electromyography (sEMG) activation of the peroneus longus and brevis has not been investigated. The purpose of this study was to compare sEMG amplitudes of the peroneus longus and brevis and eversion force measures in 2 testing positions, neutral and plantarflexion, in groups with and without CAI...
April 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28391368/effects-of-auditory-distraction-on-voluntary-movements-exploring-the-underlying-mechanisms-associated-with-parallel-processing
#15
Marcelo Bigliassi, Costas I Karageorghis, Alexander V Nowicky, Michael J Wright, Guido Orgs
Highly demanding cognitive-motor tasks can be negatively influenced by the presence of auditory stimuli. The human brain attempts to partially suppress the processing of potential distractors in order that motor tasks can be completed successfully. The present study sought to further understand the attentional neural systems that activate in response to potential distractors during the execution of movements. Nineteen participants (9 women and 10 men) were administered isometric ankle-dorsiflexion tasks for 10 s at a light intensity...
April 8, 2017: Psychological Research
https://www.readbyqxmd.com/read/28387833/endocannabinoid-and-opioid-system-interactions-in-exercise-induced-hypoalgesia
#16
Kevin M Crombie, Angelique G Brellenthin, Cecilia J Hillard, Kelli F Koltyn
Objective.:  The purpose of this study was to examine the interaction between the endogenous opioid and endocannabinoid (eCB) systems in a pain modulatory process known as exercise-induced hypoalgesia (EIH). Design.:  Randomized controlled trial. Setting.:  Clinical research unit in a hospital. Subjects.:  Fifty-eight healthy men and women (mean age = 21 ± 3 years) participated in this study. Methods: ...
April 6, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28386694/effect-of-alcohol-after-muscle-damaging-resistance-exercise-on-muscular-performance-recovery-and-inflammatory-capacity-in-women
#17
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/28381456/muscle-mechanoreflex-activation-via-passive-calf-stretch-causes-renal-vasoconstriction-in-healthy-humans
#18
Rachel C Drew, Cheryl A Blaha, Michael D Herr, Ruda Cui, Lawrence I Sinoway
Reflex renal vasoconstriction occurs during exercise, and renal vasoconstriction in response to upper-limb muscle mechanoreflex activation has been documented. However, the renal vasoconstrictor response to muscle mechanoreflex activation originating from lower limbs, with and without local metabolite accumulation, has not been assessed. Eleven healthy young subjects (26 ± 1y; 5 men) underwent two trials involving 3-min passive calf muscle stretch (mechanoreflex) during 7.5-min lower-limb circulatory occlusion (CO)...
April 5, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28381447/acute-cardiac-functional-and-mechanical-responses-to-isometric-exercise-in-prehypertensive-males
#19
Jamie M O'Driscoll, Katrina A Taylor, Jonathan D Wiles, Damian A Coleman, Rajan Sharma
Isometric exercise (IE) training has been shown to reduce resting arterial blood pressure (ABP) in hypertensive, prehypertensive, and normotensive populations. However, the acute hemodynamic response of the heart to such exercise remains unclear. We therefore performed a comprehensive assessment of cardiac structure, function, and mechanics at rest and immediately post a single IE session in 26 male (age 44.8 ± 8.4 years) prehypertensive participants. Conventional echocardiography recorded standard and tissue Doppler measures of left ventricular (LV) structure and function...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28378137/hip-external-rotation-strength-predicts-hop-performance-after-anterior-cruciate-ligament-reconstruction
#20
Paul W Kline, Jeremy Burnham, Michael Yonz, Darren Johnson, Mary Lloyd Ireland, Brian Noehren
PURPOSE: Quadriceps strength and single-leg hop performance are commonly evaluated prior to return to sport after anterior cruciate ligament reconstruction (ACLR). However, few studies have documented potential hip strength deficits after ACLR, or ascertained the relative contribution of quadriceps and hip strength to hop performance. METHODS: Patients cleared for return to sports drills after ACLR were compared to a control group. Participants' peak isometric knee extension, hip abduction, hip extension, and hip external rotation (HER) strength were measured...
April 4, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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