Search Results
Results 251 - 300 of 897
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Morales-Alamo David - - 2012
AMP-activated protein kinase (AMPK) is a major mediator of the exercise response and a molecular target to improve insulin sensitivity. To determine if the anaerobic component of the exercise response, which is exaggerated when sprint is performed in severe acute hypoxia, influences sprint exercise-elicited Thr(172)-AMPKα phosphorylation, 10 volunteers performed a ...
Schommer Kai - - 2012
Physical exertion is thought to exacerbate acute mountain sickness (AMS). In this prospective, randomized, crossover trial, we investigated whether moderate exercise worsens AMS in normobaric hypoxia (12% oxygen, equivalent to 4,500 m). Sixteen subjects were exposed to altitude twice: once with exercise [3 × 45 min within the first 4 ...
Alves Christiano Rodrigues - - 2012
The aim of this study was to compare the effects of acute aerobic and strength exercises on selected executive functions. A counterbalanced, crossover, randomized trial was performed. Forty-two healthy women were randomly submitted to three different conditions: (1) aerobic exercise, (2) strength exercise, and (3) control condition. Before and after ...
Almada C - - 2012
Increased interleukin-6 (IL-6) plasma levels have been described to occur during physical exercise. A relative reduction in energy intake after physical activity has also been reported after exercise, indicating a possible involvement of IL-6 as an anorexigenic factor. Given the possible effect of interleukins on appetite, we assessed whether a ...
Moerch L - - 2012
Mechanical loading of human tendon stimulates collagen synthesis, but the relationship between acute loading responses and training status of the tendon is not clear. We tested the effect of prolonged load deprivation on the acute loading-induced collagen turnover in human tendons, by applying the same absolute load to a relative ...
Villanueva Matthew G - - 2012
ABSTRACT: We hypothesized that total body strength (S) and hypertrophic (H) resistance training (RT) protocols utilizing relatively short rest interval (RI) lengths between sets will elicit significant acute increases in total testosterone (TT) and cortisol (C) in healthy young men. 6 men, 26 (±2.4) years, completed 4 randomized RT sessions, ...
Rattray Ben - - 2012
There is limited understanding of the mitochondrial adaptation following repeated eccentric exercise bouts, a model resulting in muscle adaptation known as the repeat bout effect. It was hypothesized that downhill training would reduce mitochondrial calcium content (MCC) post an acute eccentric bout with concurrent improvements in mitochondrial respiratory function. Thirty-four ...
Gothe Neha - - 2012
BACKGROUND: Despite an increase in the prevalence of yoga exercise, research focusing on the relationship between yoga exercise and cognition is limited. The purpose of this study was to examine the effects of an acute yoga exercise session, relative to aerobic exercise, on cognitive performance. METHODS: A repeated measures design ...
Sanchez Anthony M J - - 2012
This study aimed to investigate the effects on a possible improvement in aerobic and anaerobic performance of oral terbutaline (TER) at a supra-therapeutic dose in 7 healthy competitive male athletes. On day 1, ventilatory threshold, maximum oxygen uptake [Formula: see text] and corresponding power output were measured and used to ...
Gusso Silmara - - 2012
To determine whether adolescents with type 1 diabetes have left ventricular functional changes at rest and during acute exercise and whether these changes are affected by metabolic control and diabetes duration. The study evaluated 53 adolescents with type 1 diabetes and 22 control adolescents. Baseline data included peak exercise capacity ...
Breitbach Sarah - - 2012
The phenomenon of circulating cell-free DNA (cfDNA) concentrations is of importance for many biomedical disciplines including the field of exercise physiology. Increases of cfDNA due to exercise are described to be a potential hallmark for the overtraining syndrome and might be related to, or trigger adaptations of, immune function induced ...
Hulke Sandip Meghnad - - 2012
participation in regular intensive exercise is associated with a modest increase in left ventricular wall thickness and cavity size. The magnitude of improvement depends on frequency, intensity, type, and duration of exercise program. to determine the effect of sports training on LV morphology and function, lung function, and to know ...
Fatima Nosheen - - 2012
The aim of this is to evaluate the negative predictive value (NPV) of a normal gated myocardial perfusion imaging (NGMPI) with exercise and dipyridamole in a propensity matched population. This is a prospective study conducted at Nuclear Cardiology Department of Karachi Institute of Heart Diseases, Karachi from December 2008 until ...
Lin Song S Department of Cardiology, Nanjing Medical University Affiliated Nanjing First Hospital, Nanjing, - - 2012
To determine whether isometric exercise increases collateral flow in remote ischaemic myocardium in acute coronary occlusion models of patients with coronary artery disease. A randomized controlled study. Sixty-five patients with 1-vessel coronary artery disease. Subjects were randomly assigned to either the isometric exercise group or non-exercise group. Patients in the ...
Holloway Cameron J CJ Department of Physiology, Anatomy and Genetics, The University of Oxford, Parks Road, Sherrington Building, Oxford OX1 3PT, UK. - - 2012
To determine the effects of short-term exercise training on cardiac function and metabolism during rest and physical exercise in patients with heart failure from dilated cardiomyopathy (DCM). Patients with DCM (n=15, age 58±2 years, NYHA class I-III) were studied before and after 8 weeks of cycle exercise for 20 min, ...
Belviranlı Muaz - - 2012
The objective of the present study was to investigate the effects of grape seed extract (GSE) supplementation on oxidative stress and antioxidant defense markers in liver tissue of acutely and chronically exercised rats. Rats were randomly assigned to six groups: Control (C), Control Chronic Exercise (CE), Control Acute Exercise (AE), ...
Hartman Annelies - - 2012
BACKGROUND: Impaired motor performance and reduced maximum exercise capacity during and after treatment of acute lymphoblastic leukemia (ALL) has been shown. However, no longitudinal study monitoring motor performance after cessation of treatment has been published. Whether sub-maximal exercise capacity is reduced is unknown. PROCEDURE: Motor performance of pediatric ALL survivors, ...
Katayama Keisho - - 2012
The purpose of this study was to clarify the effect of acute exercise in hypoxia on flow-mediated vasodilation (FMD). Eight males participated in this study. Two maximal exercise tests were performed using arm cycle ergometry to estimate peak oxygen uptake [Formula: see text] while breathing normoxic [inspired O(2) fraction (FIO(2)) = 0.21] ...
Alibhai Shabbir M H - - 2012
Patients with acute myeloid leukemia (AML) receiving induction chemotherapy (IC) were enrolled in a supervised exercise intervention to determine safety, feasibility, and efficacy. Physical fitness measures, quality of life (QOL) and fatigue were assessed using standardized measures at baseline, post-induction, and post first consolidation. Retention was excellent, the intervention was ...
Schuler Beat - - 2012
Application of recombinant human erythropoietin (rhEpo) improves exercise capacity by stimulating red blood cell production that, in turn, enhances oxygen delivery and utilization. Apart from this, when applied at high doses, rhEpo crosses the blood-brain barrier, triggering protective neuronal effects. Here we show a fundamental new role by which the ...
Duncan M J - - 2012
This double-blind, within-subjects experiment examined the effects of acute caffeine ingestion on perceptions of muscle pain following a bout of high-intensity, upper-body resistance exercise to failure. Moderately trained males (N.=18) ingested a dose of caffeine (5 mg · kg-1) or placebo in a randomised and counterbalanced order and 1 hour ...
Kilic-Toprak Emine - - 2012
This study aimed to explore the effects of progressive resistance exercise training (PRET) on hemorheology. Exercise sessions included 1-3 sets of 8-12 repetitions at 40-60% of 1-repetition maximum (1-RM) for 3 weeks and at 75-80% of 1-RM during weeks 4-12. Red blood cell (RBC) deformability and aggregation were determined by ...
Fulco Charles S - - 2012
ABSTRACT: Acute mountain sickness (AMS) and large decrements in endurance exercise performance occur when unacclimatized individuals rapidly ascend to high altitude. Six altitude and hypoxia pre-acclimatization strategies were evaluated to determine their effectiveness for minimizing AMS and improving performance during altitude exposure. Strategies using hypobaric chambers or true altitude were ...
Currie Katharine D - - 2012
PURPOSE: Cardiovascular disease is characterized by decreased endothelial function. Chronic exercise training improves endothelial function in individuals with cardiovascular diseases; however, the acute endothelial responses to a single bout of exercise are not consistent in the literature. This study investigated if a single bout of moderate-intensity endurance exercise (END) and ...
Noreen Eric E - - 2012
ABSTRACT: The purpose of this study was to determine the effects of an acute oral dose of 3mg/kg of Rhodiola Rosea (Rr) on endurance exercise performance, perceived exertion, mood, and cognitive function. Subjects (n=18) ingested either Rr or a carbohydrate placebo 1 h prior to testing in a double blind, ...
McFarlan Jay T - - 2012
For ~40 years it has been widely accepted that (i) the exercise-induced increase in muscle fatty acid oxidation (FAO) is dependent on the increased delivery of circulating fatty acids, and (ii) exercise training-induced FAO up-regulation is largely attributable to muscle mitochondrial biogenesis. These long standing concepts were developed prior to ...
Engan Harald K - - 2012
Acute dietary nitrate (NO(3)(-)) supplementation has been reported to lower resting blood pressure, reduce the oxygen (O(2)) cost of sub-maximal exercise, and improve exercise tolerance. Given the proposed effects of NO(3)(-) on tissue oxygenation and metabolic rate, it is possible that NO(3)(-) supplementation might enhance the duration of resting apnea. ...
Minshull Claire - - 2012
Abstract This study examined the concurrent effects of exercise-induced muscle damage and superimposed acute fatigue on the neuromuscular activation performance of the knee flexors of nine males (age: 26.7±6.1 years; height 1.81±0.05 m; body mass 81.2±11.7 kg [mean±s]). Measures were obtained during three experimental conditions: (i) 'fatigue-muscle damage', involving acute ...
Strak Maciej - - 2012
Background. Specific characteristics of particulate matter (PM) responsible for associations with respiratory health observed in epidemiological studies are not well established. High correlations among and differential measurement errors of individual components contribute to this uncertainty. Objectives. Investigate which PM characteristics have the most consistent associations with acute changes in respiratory ...
Smith Douglas C - - 2012
People with multiple sclerosis (MS) are likely to benefit from regular exercise, but physical inactivity is more common among people with MS than among the general population. This small randomized study evaluated whether motivational interviewing (MI) affects adherence to and personal experience in an exercise program. Inactive people with MS ...
Tang Clarice Y - - 2012
: To determine whether an early rehabilitation program was safe and feasible for patients during an acute exacerbation of chronic obstructive pulmonary disease (COPD). : In this phase 1 randomized controlled trial, patients with an acute exacerbation of COPD admitted to the hospital were randomly allocated to a low-intensity exercise ...
Lane A D - - 2012
Aortic reservoir function is a measure of the aorta's ability to distribute blood during diastole, attenuating the pulsatility of blood flow, and is important in balancing cardiac flow. Effects of acute high versus moderate exercise intensity on reservoir function and cardiac energetics is unknown. Eighteen athletes completed a interval (INT) ...
Wilkerson Daryl P - - 2012
Dietary nitrate supplementation has been reported to improve short distance time trial (TT) performance by 1-3 % in club-level cyclists. It is not known if these ergogenic effects persist in longer endurance events or if dietary nitrate supplementation can enhance performance to the same extent in better trained individuals. Eight well-trained ...
Mitchell Cameron J - - 2012
We have reported that the acute postexercise increases in muscle protein synthesis rates, with differing nutritional support, are predictive of longer-term training-induced muscle hypertrophy. Here, we aimed to test whether the same was true with acute exercise-mediated changes in muscle protein synthesis. Eighteen men (21 ± 1 yr, 22.6 ± ...
Barna Bárbara F - - 2012
During exercise, intense brain activity orchestrates an increase in muscle tension. Additionally, there is an increase in cardiac output and ventilation to compensate the increased metabolic demand of muscle activity and to facilitate the removal of CO(2) from and the delivery of O(2) to tissues. Here we tested the hypothesis ...
Jiang Meng - - 2012
The early- to mid-term impact of bone-marrow-derived stem cells (BMC) on diastolic function and exercise capacity after acute myocardial infarction (AMI) remains controversial. We performed a systematic analysis to assess whether BMC transfer is related to an early improvement in diastolic function and exercise capacity after AMI. Randomized controlled trials ...
Fogarty Mark C - - 2012
Pharmacological antioxidant vitamins have previously been investigated for a prophylactic effect against exercise-induced oxidative stress. However, large doses are often required and may lead to a state of pro-oxidation and oxidative damage. Watercress contains an array of nutritional compounds such as β-carotene and α-tocopherol which may increase protection against exercise-induced ...
Dalbo Vincent J - - 2012
PURPOSE: The aim of the study was to examine the acute effects of pre-exercise ingestion of protein, carbohydrate, and a non-caloric placebo on serum concentrations of insulin and cortisol, and the intramuscular gene expression of myostatin- and ubiquitin proteasome pathway (UPP)-related genes following a bout of resistance exercise. METHODS: Ten ...
Donges Cheyne E - - 2012
We determined myofibrillar and mitochondrial protein fractional synthesis rates (FSR), intramuscular signaling protein phosphorylation, and mRNA expression responses after isolated bouts of resistance exercise (RE), aerobic exercise (AE), or in combination [termed concurrent exercise (CE)] in sedentary middle-aged men. Eight subjects (age = 53.3 ± 1.8 yr; body mass index ...
Rossow Lindy M - - 2012
The purpose of this study was to determine (i) the cardiovascular responses to acute blood-flow-restricted (BFR) resistance exercise and (ii) the influence of applied BFR cuff type on the cardiovascular and perceptual responses. In a randomized, crossover design, 27 participants wore either a 5·0 cm wide elastic cuff or a 13·5 cm ...
Halvorsen Silje - - 2012
OBJECTIVE: To evaluate the effectiveness of aerobic dance on cardiorespiratory fitness in pregnant women. DESIGN: Randomised controlled trial. PARTICIPANTS: Sixty-two primiparous women with a mean age of 30.6 [standard deviation (SD) 3.7] years randomised to exercise (n=34) and (n=28) control groups. INTERVENTION: Two aerobic dance classes per week and 30 ...
Goodall Stuart - - 2012
Inadequate cerebral O₂ availability has been proposed to be an important contributing factor to the development of central fatigue during strenuous exercise. Here we tested the hypothesis that supraspinal processes of fatigue would be increased after locomotor exercise in acute hypoxia compared to normoxia, and that such change would be ...
Sharafi Hossein - - 2012
ABSTRACT:: Sharafi, H, and Rahimi, R. The effect of resistance exercise on p53, caspase-9, and caspase-3 in trained and untrained men. J Strength Cond Res 26(4): 1142-1148, 2012-Apoptosis is a programmed cell death that has been demonstrated in human and animal studies and plays an essential role to remove injured ...
Newlin Mia K - - 2012
To investigate the effects of acute exercise on serum hepcidin and iron (sFe) in active women. Changes in interleukin-6 (IL-6), hepcidin, ferritin, and sFe in response to 2 different exercise durations were compared. Twelve women age 19-32 yr performed 2 treadmill runs (60 and 120 min) at 65% of VO2max. ...
Menon Manoj K - - 2012
ABSTRACT BACKGROUND:Quadriceps dysfunction in COPD may be mediated by inflammatory mechanisms or impaired satellite cell function. Resistance training is of proven efficacy in these patients, but data on muscle inflammatory and satellite cell response to resistance exercise in COPD is lacking. We aimed to examine the inflammatory and satellite cell ...
Fernandez-Gonzalo Rodrigo - - 2012
This study aimed to investigate the response of the toll-like receptor 4 (TLR4) signaling pathway to an acute bout of eccentric exercise, and to assess whether eccentric training attenuated the effects induced by acute eccentric exercise. Twenty men (22.4 ± 0.5 yr) were divided into a control group (CG, n ...
Lundberg Tommy R - - 2012
PURPOSE: This study assessed the influence of an acute aerobic exercise bout on molecular responses to subsequent resistance exercise. METHODS: Nine physically active men performed ∼45 min one-legged cycle ergometry exercise, and 4 × 7 maximal concentric-eccentric knee extensions for each leg 6 hrs later. Thus, one limb was subjected ...
Mestre-Alfaro Antonia - - 2012
Abstract The aim of this study was to determine the effects of whole body heat in combination with exercise on the oxidative stress and acute phase immune response. Nine male endurance-trained athletes volunteered performed two running bouts of 45 min at 75-80% of VO2max in a climatic chamber in two ...
Liu Sam - - 2012
PURPOSE: Aerobic exercise is recommended as way to prevent hypertension. However, about 25% of the individuals receive minimal anti-hypertensive benefits associated with chronic exercise training. Thus, we attempt to identify those "non-responders" to chronic exercise based on their blood pressure (BP) responses to acute exercise (single-session). Our primary objective is ...
Barrès Romain - - 2012
DNA methylation is a covalent biochemical modification controlling chromatin structure and gene expression. Exercise elicits gene expression changes that trigger structural and metabolic adaptations in skeletal muscle. We determined whether DNA methylation plays a role in exercise-induced gene expression. Whole genome methylation was decreased in skeletal muscle biopsies obtained from healthy ...
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