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https://www.readbyqxmd.com/read/28329285/upright-treadmill-vs-semi-supine-bicycle-exercise-echocardiography-to-provoke-obstruction-in-symptomatic-hypertrophic-cardiomyopathy-a-pilot-study
#1
Patricia Reant, Maxence Dufour, Jerome Peyrou, Amelie Reynaud, Caroline Rooryck, Marina Dijos, Cecile Vincent, Claire Cornolle, Raymond Roudaut, Stephane Lafitte
Aims: Recent findings regarding hypertrophic cardiomyopathy (HCM) haemodynamics emphasized the relationship between symptoms, left ventricular outflow tract obstruction (LVOTO), and the preload condition as the venous return level. As various types of exercises have different effects on peripheral vascular beds, this study sought to compare upright treadmill exercise echocardiography (EE) to semi-supine bicycle EE in maximum provoked LVOTO in HCM patients. Methods and results: Semi-supine bicycle and upright treadmill EE were prospectively performed in HCM patients with New York Heart Association functional Class II...
February 17, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28326351/effects-of-low-dose-ibuprofen-supplementation-and-resistance-training-on-bone-and-muscle-in-postmenopausal-women-a-randomized-controlled-trial
#2
Whitney R D Duff, Saija A Kontulainen, Darren G Candow, Julianne J Gordon, Riley S Mason, Regina Taylor-Gjevre, Bindu Nair, Michael Szafron, Adam D G Baxter-Jones, Gordon A Zello, Philip D Chilibeck
PURPOSE: To compare the effects of nine months of exercise training and ibuprofen supplementation (given immeditately after exercise sessions) on bone and muscle in postmenopausal women. METHODS: In a double-blind randomized trial, participants (females: n = 90, mean age 64.8, SD 4.3 years) were assigned (computer generated, double blind) to receive supervised resistance training or stretching 3 days/week, and ibuprofen (400 mg, post-exercise) or placebo (i...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28319585/increased-fatigue-response-to-augmented-deceptive-feedback-during-cycling-time-trial
#3
Guillaume P Ducrocq, Thomas J Hureau, Olivier Meste, Grégory M Blain
PURPOSE: This study aimed to investigate the effect of different magnitudes of deception on performance and exercise-induced fatigue during cycling time-trial. METHODS: Following three familiarization visits, three females and eight males performed three 5 km cycling time-trials while following a simulated dynamic avatar reproducing either 100% (5K100%), 102% (5K102%) or 105% (5K105%) of the subject's previous fastest trial. Quadriceps muscle activation was quantified with surface electromyography...
March 18, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28314055/localization-of-muscle-damage-within-the-quadriceps-femoris-induced-by-different-types-of-eccentric-exercises
#4
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/28303472/chronic-exertional-compartment-syndrome-in-the-forearm-of-a-collegiate-softball-pitcher
#5
REVIEW
Austin Cole, John L Hiatt, Christopher Arnold, Terry Sites, Ramon Ylanon
BACKGROUND: Chronic exertional compartment syndrome (CECS) is a recognized condition in the lower limb, with many reports in the literature. However, very few instances include CECS of the upper limb. This article presents the case of a collegiate softball pitcher presenting with CECS in her right forearm. To our knowledge, this is the first case report of a softball player with CECS, with only one similar incident in a major league baseball player. PURPOSE: The rarity of this condition normally places it low on the differential diagnosis...
December 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28301435/different-cluster-sets-result-in-similar-metabolic-endocrine-and-perceptual-responses-in-trained-men
#6
James J Tufano, Jenny A Conlon, Sophia Nimphius, Jonathan M Oliver, Andreas Kreutzer, G Gregory Haff
The purpose of this study was to compare the kinematic, metabolic, endocrine, and perceptual responses of three back squat protocols with equal loads, number of repetitions, and total rest duration. Eight strength-trained men performed 36 back squats using 75% 1RM and 420 s of total rest during basic cluster sets of 4 (CS4), rest-redistribution sets of 4 (RR4), and rest-redistribution sets of 1 (RR1). Ratings of perceived exertion (RPE), blood lactate (La), mean velocity maintenance (MVM), and mean velocity loss (MVL) were measured during exercise...
March 13, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28299447/markers-of-physiological-stress-during-exercise-under-conditions-of-normoxia-normobaric-hypoxia-hypobaric-hypoxia-and-genuine-high-altitude
#7
David Richard Woods, John Paul O'Hara, Christopher John Boos, Peter David Hodkinson, Costas Tsakirides, Neil Edward Hill, Darren Jose, Amanda Hawkins, Kelly Phillipson, Antonia Hazlerigg, Nicola Arjomandkhah, Liam Gallagher, David Holdsworth, Mark Cooke, Nicholas Donald Charles Green, Adrian Mellor
PURPOSE: To investigate whether there is a differential response at rest and following exercise to conditions of genuine high altitude (GHA), normobaric hypoxia (NH), hypobaric hypoxia (HH), and normobaric normoxia (NN). METHOD: Markers of sympathoadrenal and adrenocortical function [plasma normetanephrine (PNORMET), metanephrine (PMET), cortisol], myocardial injury [highly sensitive cardiac troponin T (hscTnT)], and function [N-terminal brain natriuretic peptide (NT-proBNP)] were evaluated at rest and with exercise under NN, at 3375 m in the Alps (GHA) and at equivalent simulated altitude under NH and HH...
March 15, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28296942/co-ingestion-of-carbohydrate-and-whey-protein-increases-fasted-rates-of-muscle-protein-synthesis-immediately-after-resistance-exercise-in-rats
#8
Wanyi Wang, Zhenping Ding, Geoffrey J Solares, Soon-Mi Choi, Bo Wang, Aram Yoon, Roger P Farrar, John L Ivy
The objective of the study was to investigate whether co-ingestion of carbohydrate and protein as compared with protein alone augments muscle protein synthesis (MPS) during early exercise recovery. Two months old rats performed 10 repetitions of ladder climbing with 75% of body weight attached to their tails. Placebo (PLA), whey protein (WP), or whey protein plus carbohydrate (CP) was then given to rats by gavage. An additional group of sedentary rats (SED) was used as controls. Blood samples were collected immediately and at either 1 or 2 h after exercise...
2017: PloS One
https://www.readbyqxmd.com/read/28292763/oxygen-delivery-and-the-restoration-of-the-muscle-energetic-balance-following-exercise-implications-for-delayed-muscle-recovery-in-patients-with-copd
#9
Gwenael Layec, Corey R Hart, Joel D Trinity, Oh-Sung Kwon, Matthew J Rossman, Ryan M Broxterman, Yann Le Fur, Eun-Kee Jeong, Russell S Richardson
Patients with chronic obstructive pulmonary disease (COPD) experience a delayed recovery from skeletal muscle fatigue following exhaustive exercise that likely contributes to their progressive loss of mobility. As this phenomenon is not well understood, this study sought to examine post-exercise peripheral oxygen (O2) transport and muscle metabolism dynamics in patients with COPD, two important determinants of muscle recovery. Twenty four subjects, 12 non-hypoxemic patients with COPD and 12 healthy subjects with a sedentary lifestyle, performed dynamic plantar flexion exercise at 40% of maximal work rate (WRmax) with phosphorus magnetic resonance spectroscopy ((31)P-MRS), near-infrared spectroscopy (NIRS), and vascular Doppler ultrasound assessments...
March 14, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28292758/feeding-influences-adipose-tissue-responses-to-exercise-in-overweight-men
#10
Yung-Chih Chen, Rebecca L Travers, Jean-Philippe Walhin, Javier T Gonzalez, Francoise Koumanov, James A Betts, Dylan Thompson
Feeding profoundly affects metabolic responses to exercise in various tissues but the effect of feeding status on human adipose tissue responses to exercise has never been studied. Ten healthy overweight men aged 26 ± 5 years (mean ± SD) with a waist circumference of 105 ± 10 cm walked at 60% of maximum oxygen uptake under either FASTED or FED conditions in a randomised, counterbalanced design. Feeding comprised 648 ± 115 kcal 2 h before exercise. Blood samples were collected at regular intervals to examine changes in metabolic parameters and adipokine concentrations...
March 14, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28290716/cycling-vs-uphill-walking-impact-on-locomotor-muscle-fatigue-and-running-exercise
#11
Benjamin Pageaux, Jean Theurel, Romuald Leper
PURPOSE: To describe the effects of uphill walking versus cycling exercises on knee extensors (KE) neuromuscular properties and subsequent running exercise. METHODS: Nine athletes performed four different sessions (one familiarization and three experimental sessions, visit 2 to 4). Visit 2 (cycling + 10 km condition) consisted of the completion of 1-h cycling followed by a 10 km running time trial. Visit 3 consisted of the completion of 1-h uphill walking followed by a 10 km running exercise (RE)...
March 14, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28290057/intestinal-fatty-acid-binding-protein-and-gut-permeability-responses-to-exercise
#12
Daniel S March, Tania Marchbank, Raymond J Playford, Arwel W Jones, Rhys Thatcher, Glen Davison
PURPOSE: Intestinal cell damage due to physiological stressors (e.g. heat, oxidative, hypoperfusion/ischaemic) may contribute to increased intestinal permeability. The aim of this study was to assess changes in plasma intestinal fatty acid-binding protein (I-FABP) in response to exercise (with bovine colostrum supplementation, Col, positive control) and compare this to intestinal barrier integrity/permeability (5 h urinary lactulose/rhamnose ratio, L/R). METHODS: In a double-blind, placebo-controlled, crossover design, 18 males completed two experimental arms (14 days of 20 g/day supplementation with Col or placebo, Plac)...
March 13, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28288012/influence-of-upper-body-exercise-on-the-fatigability-of-human-respiratory-muscles
#13
Nicholas B Tiller, Ian G Campbell, Lee M Romer
PURPOSE: Diaphragm and abdominal muscles are susceptible to contractile fatigue in response to high-intensity, whole-body exercise. This study assessed whether the ventilatory and mechanical loads imposed by high-intensity, upper-body exercise would be sufficient to elicit respiratory muscle fatigue. METHODS: Seven healthy men (mean±SD: age 24±4 y; peak O2 uptake [V[Combining Dot Above]O2 peak] 31.9±5.3 ml/kg/min) performed asynchronous arm-crank exercise to exhaustion at work rates equivalent to 30% (heavy) and 60% (severe) of the difference between gas-exchange threshold and V[Combining Dot Above]O2 peak...
March 10, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28285432/a-low-dose-6-week-bovine-colostrum-supplementation-maintains-performance-and-attenuates-inflammatory-indices-following-a-loughborough-intermittent-shuttle-test-in-soccer-players
#14
Yiannis Kotsis, Anastasia Mikellidi, Cleopatra Aresti, Eleni Persia, Aristomenis Sotiropoulos, Demosthenes B Panagiotakos, Smaragdi Antonopoulou, Tzortzis Nomikos
PURPOSE: The aim of the study was to investigate the effect of a 6-week, low-dose bovine colostrum (BC) supplementation on exercise-induced muscle damage (EIMD) and performance decline in soccer players following the Loughborough Intermittent Shuttle Test (LIST) during a competitive season period. METHODS: In a double-blind, randomized, placebo-controlled design, two groups of soccer players were allocated to a 3.2 g/day of whey protein (WP, N = 8) or BC (N = 10) and performed a pre- and a post-supplementation LIST...
March 11, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28282743/can-changes-in-resistance-exercise-workload-influence-internal-load-countermovement-jump-performance-and-the-endocrine-response
#15
Daniel J Hiscock, Brian Dawson, Michael Clarke, Peter Peeling
This study examined the influence of differing volume load and intensity (%1 repetition maximum[%1RM]) resistance exercise workouts on session rating of perceived exertion (sRPE) countermovement jump (CMJ) performance and endocrine responses. Twelve participants performed a workout comprising four exercises (bench press, back squat, deadlift and prone bench pull) in randomised order as either power (POW); 3 sets × 6 repetitions at 45%1RM × 3 min inter-set rest, strength (ST); 3 sets × 3 repetitions at 90%1RM × 3 min inter-set rest, or hypertrophy (HYP); 3 sets × 10 repetitions at 70%1RM × 1 min inter-set rest in a randomised-crossover design...
February 23, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28282741/effects-of-acute-exercise-dehydration-and-rehydration-on-cognitive-function-in-well-trained-athletes
#16
Christopher Irwin, Nadia Campagnolo, Elizaveta Iudakhina, Gregory R Cox, Ben Desbrow
This study investigated the effects of aerobic exercise, fluid loss and rehydration on cognitive performance in well-trained athletes. Ten endurance-trained males (25 ± 5 years; 175 ± 5 cm; 70.35 ± 5.46 kg; VO2max, 62.95 ± 7.20 ml · kg.min(-1)) lost ~2.5 ± 0.6% body mass via continuous cycling exercise at ~65% peak sustainable power output (60 min duration) before consuming different beverages (Water = W1 and W2, Sustagen Sport = SS, Powerade = PD) and food ad libitum on four separate occasions...
March 2, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28281651/sprint-interval-but-not-continuous-exercise-increases-pgc-1%C3%AE-protein-content-and-p53-phosphorylation-in-nuclear-fractions-of-human-skeletal-muscle
#17
Cesare Granata, Rodrigo S F Oliveira, Jonathan P Little, Kathrin Renner, David J Bishop
Sprint interval training has been reported to induce similar or greater mitochondrial adaptations to continuous training. However, there is limited knowledge about the effects of different exercise types on the early molecular events regulating mitochondrial biogenesis. Therefore, we compared the effects of continuous and sprint interval exercise on key regulatory proteins linked to mitochondrial biogenesis in subcellular fractions of human skeletal muscle. Nineteen men, performed either 24 min of moderate-intensity continuous cycling at 63% of WPeak (CE), or 4 × 30-s "all-out" cycling sprints (SIE)...
March 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28280109/exercise-induced-dehydration-alters-pulmonary-function-but-does-not-modify-airway-responsiveness-to-dry-air-in-athletes-with-mild-asthma
#18
Andrew J Simpson, Lee M Romer, Pascale Kippelen
BACKGROUND: Local airway water loss is the main physiological trigger for exercise-induced bronchoconstriction (EIB). AIM: To investigate the effects of whole-body water loss on airway responsiveness and pulmonary function in athletes with mild asthma and/or EIB. METHODS: Ten recreational athletes with a doctor diagnosis of mild asthma and/or EIB completed a randomized, cross-over study. Pulmonary function tests (spirometry, whole-body plethysmography and diffusing capacity for carbon monoxide [DLCO]) were conducted before and after three conditions: i) 2 h exercise in the heat with no fluid intake (dehydration); ii) 2 h exercise with ad libitum fluid intake (control); and iii) time-matched rest period (rest)...
March 9, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28277406/comparable-neutrophil-responses-for-arm-and-intensity-matched-leg-exercise
#19
Christof A Leicht, Victoria L Goosey-Tolfrey, Nicolette C Bishop
INTRODUCTION: Arm exercise is performed at lower absolute intensities than lower body exercise. This may impact on intensity dependent neutrophil responses and it is unknown whether individuals restricted to arm exercise experience the same changes in the neutrophil response as found for lower body exercise. Therefore, we aimed to investigate the importance of exercise modality and relative exercise intensity on the neutrophil response. METHODS: Twelve moderately trained males performed three 45-min constant load exercise trials following determination of peak oxygen uptake for arm exercise (V[Combining Dot Above]O2peak arms) and cycling (V[Combining Dot Above]O2peak legs): (1) arm cranking exercise at 60%V[Combining Dot Above]O2peak arms; (2) moderate cycling at 60%V[Combining Dot Above]O2peak legs; and (3) easy cycling at 60%V[Combining Dot Above]O2peak arms...
March 8, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28276838/modulation-of-prefrontal-cortex-with-anodal-tdcs-prevents-post-exercise-facilitation-interference-during-dual-task
#20
Carmen Concerto, Jacqueline Babayev, Rowan Mahmoud, Basil Rafiq, Eileen Chusid, Eugenio Aguglia, Diego Coira, Fortunato Battaglia
In this study we aimed to investigate whether transcranial direct current stimulation (tDCS) over the left dorsolateral prefrontal cortex (DLPFC) reduces interference effects of a dual task (DT) on post-exercise facilitation (PEF) of the motor evoked potentials. Anodal tDCS reversed the DT interference on PEF after a non-fatiguing isometric contraction. We conclude that anodal DLPFC tDCS improves the ability to allocate attentional resources and modulates plastic adaptations across brain systems.
February 28, 2017: Somatosensory & Motor Research
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