Search Results
Results 301 - 350 of 1394
< 2 3 4 5 6 7 8 9 10 11 12 >
de Barros M Paes - - 2011
Background A plethora of data revealed that reactive oxygen species (ROS) are normally produced during/after endurance or resistance exercise. Drastic drops in performance, precocious fatigue and injury risk are putative outcomes of the ROS-mediated biochemical changes. On the other hand, adequate ROS production is essential to provide the desired physiological ...
Alahmadi Mohammad A - - 2011
: The purpose of this study was to determine the effect of acute bouts of moderate- and high-intensity walking exercise on nonexercise activity thermogenesis (NEAT) in overweight and obese adults. : Sixteen participants performed a single bout of either moderate-intensity walking exercise (MIE) or high-intensity walking exercise (HIE) on two ...
Robertson H Thomas - - 2011
This review explores the pathophysiology of gas exchange abnormalities arising consequent to either acute or chronic elevation of pulmonary venous pressures. The initial experimental studies of acute pulmonary edema outlined the sequence of events from lymphatic congestion with edema fluid to frank alveolar flooding and its resultant hypoxemia. Clinical studies ...
Billman George E - - 2011
The consumption of omega-3 polyunsaturated fatty acids (n-3 PUFAs) has been reported to decrease resting heart rate (HR) and increase heart rate variability (HRV). However, the effects of n-3 PUFAs on these variables in response to a physiological stress (e.g., exercise or acute myocardial ischemia), particularly in postmyocardial infarction (MI) ...
Schultz Martin G - - 2011
Abstract Purpose: Masked hypertension (MH) independently predicts mortality but cannot be diagnosed from clinic blood pressure (BP) taken under resting conditions. We sought to determine if MH could be identified from BP taken during a single bout of low-intensity exercise. Methods. BP was recorded at rest and during brief low-level ...
Thaning Pia - - 2011
Sympathetic vasoconstriction is blunted in contracting human skeletal muscles (functional sympatholysis). In young subjects, infusion of adenosine and ATP increases blood flow, and the latter compound also attenuates α-adrenergic vasoconstriction. In patients with type 2 diabetes and age-matched healthy subjects, we tested 1) the sympatholytic capacity during one-legged exercise, 2) ...
Rosa Jaime S - - 2011
Obesity (Ob) and type 1 diabetes (T1DM) are associated with increased inflammation and oxidative stress, which are major pathogenetic pathways toward higher cardiovascular risks. Although long-term exercise protects against systemic inflammation and oxidation, acute exercise actually exerts pro-inflammatory and oxidative effects, prompting the necessity for better defining these molecular processes ...
Pinkstaff Sherry - - 2011
INTRODUCTION:: Peak oxygen uptake (Vo2) is prognostic for morbidity and mortality. Estimating aerobic capacity during traditional exercise stress testing is common as it has been shown that total treadmill time on the Bruce protocol predicts peak Vo2. However, the potential to overestimate peak Vo2 exists and may have clinical implications ...
Casey Darren P - - 2011
Hypoxia during exercise augments blood flow in active muscles to maintain the delivery of O(2) at normoxic levels. However, the impact of hyperoxia on skeletal muscle blood flow during exercise is not completely understood. Therefore, we tested the hypothesis that the hyperemic response to forearm exercise during hyperbaric hyperoxia would ...
Vogiatzis Ioannis - - 2011
Besides dyspnea relief, an improvement in locomotor muscle oxygen delivery may also contribute to enhanced exercise tolerance following normoxic heliox administration in patients with chronic obstructive pulmonary disease (COPD). Whether blood flow redistribution from intercostal to locomotor muscles contributes to this improvement, currently remains unknown. Accordingly, the objective of this ...
Deminice Rafael - - 2011
The aim of this study was to evaluate the effect of creatine supplementation on homocysteine (Hcy) metabolism after acute aerobic and anaerobic exercise. A total of 112 Wistar rats were divided into four groups: aerobic exercise (A), aerobic exercise plus creatine supplementation (ACr), anaerobic exercise (An), and anaerobic exercise plus ...
Tsougos Elias - - 2011
To investigate whether exercise-induced changes of the E/E' average ratio can detect high-burden coronary artery disease (CAD) in patients with chest pain and normal left ventricular (LV) systolic function. The study population consisted of 359 patients admitted for chest pain (59.8 ± 9.8 years, 75% male). Patients underwent exercise echocardiography, scintigraphy and coronary ...
Devereux Gavin R - - 2011
In this study, we examined the correlations between selected markers of isometric training intensity and subsequent reductions in resting blood pressure. Thirteen participants performed a discontinuous incremental isometric exercise test to volitional exhaustion at which point mean torque for the final 2-min stage (2min-torque(peak)) and peak heart rate peak (HR(peak)) ...
de Liefde Inge I - - 2011
OBJECTIVE: Earlier studies have shown that hypertensive or hypotensive blood pressure (BP) response during a preoperative treadmill exercise test in patients with peripheral arterial disease is associated with a two-fold increased risk of cardiovascular events and mortality. However, it is unknown if these patients also experience an increased perioperative complication ...
Greer Beau K - - 2011
Greer, BK and Jones, BT. Acute arginine supplementation fails to improve muscle endurance or affect blood pressure responses to resistance training. J Strength Cond Res 25(X): 000-000, 2011-Dietary supplement companies claim that arginine supplements acutely enhance skeletal muscular endurance. The purpose of this study was to determine whether acute arginine ...
Monzen Hajime - - 2011
BACKGROUND: The combination of adenosine infusion with low-level exercise has become a common approach for inducing stress during stress myocardial perfusion imaging (MPI). We investigated stress MPI performed by combined low-level exercise and adenosine infusion. This combined protocol can decrease adverse reactions and reduce the effect of scattered rays from ...
Straburzyńska-Migaj Ewa - - 2011
OBJECTIVES: To evaluate influence of Bone Marrow Stem Cells (BMSC) intracoronary infusion on exercise capacity, pulmonary function, heart rate recovery and SAECG in patients with AMI of anterior wall, compared to control group - from baseline in the acute phase during 12months follow up. METHODS: Forty five patients were randomized ...
Mascher Henrik - - 2011
Aim:  The major aim of the present investigation was to determine the fractional rate of protein synthesis (FSR) during the early period of recovery after intensive aerobic exercise in the absence of nutritional supplementation. Methods:  Sixteen male subjects performed one-legged cycling exercise for 1h at approximately 65-70% of their one-legged ...
Sondergaard Esben - - 2011
Lipids are important substrates for oxidation at rest and during exercise. Aerobic exercise mediates a delayed onset decrease in total and VLDL-triglyceride (TG) plasma concentration. However, the acute effects of exercise on VLDL-TG oxidation and turnover remain unclear. Here, we studied the acute effects of 90 min of moderate-intensity exercise ...
Stagg Nicola J - - 2011
BACKGROUND:: Exercise is often prescribed as a therapy for chronic pain. Short-term exercise briefly increases the production of endogenous analgesics, leading to transient antinociception. In limited studies, exercise produced sustained increases in endogenous opioids, sustained analgesia, or diminished measures of chronic pain. This study tests the hypothesis that regular aerobic ...
Farinatti Paulo T V - - 2011
Farinatti, PTV, Brandão, C, Soares, PPS, and Duarte, AFA. Acute effects of stretching exercise on the heart rate variability in subjects with low flexibility levels. J Strength Cond Res 25(X): 000-000, 2011-The study investigated the heart rate (HR) and heart rate variability (HRV) before, during, and after stretching exercises performed ...
Lovering Andrew T - - 2011
The prevalence of a patent foramen ovale (PFO) is ~30%, and this source of right-to-left shunt could result in greater pulmonary gas exchange impairment at rest and during exercise. The aim of this work was to determine if individuals with an asymptomatic PFO (PFO+) have greater pulmonary gas exchange inefficiency ...
de Liefde I I - - 2011
Background: Exercise test parameters (exercise ankle brachial index (ABI), walking distance and blood pressure response) separately are associated with long-term outcome in patients with known or suspected peripheral arterial disease (PAD). However, the clinical value of the combination of these parameters together is unknown. Methods: 2165 patients performed a treadmill ...
Evangelista Renato - - 2011
To compare differences between two different rest interval lengths between sets on the volume completed, muscle damage and muscle soreness during a resistance exercise bout. Twenty-eight healthy sedentary men (18 ± 1 y old) volunteered to participate in this study and were divided into the 1 min (1RI; n = ...
Gebauer Dieter P - - 2011
: To test the hypothesis that 2 types of custom-made mouthguards will have no effect on ventilation (&OV0312;E, L·min), oxygen uptake (&OV0312;O2, mL·kg·min·), and heart rate (beats per minutes) at varying exercise intensities (10 km·h and 12 km·h) and at subjective maximal effort (&OV0312;O2peak) in male field hockey and water ...
Tartibian Bakhtyar - - 2011
: To examine the effect of ingestion of omega-3 (N-3) fatty acids on the production of interleukin (IL) 6, tumor necrosis factor (TNF) α, prostaglandin (PG) E2, lactate dehydrogenase (LDH), creatine kinase (CK), and myoglobin (Mb) during an eccentric exercise program. : A randomized, double-blinded, repeated measures design was used ...
Coiro V - - 2011
The effect of an i. v. infusion of somatostatin (SRIH) 4.1 μg/min×90 min on the basal secretion of NPY and on the NPY response to physical exercise was studied in normal men. Basal NPY secretion was not modified by SRIH infusion, whereas the NPY response to physical exercise was significantly ...
Başkurt M - - 2011
The aim of this study was to detect any relationship between serum high-sensitivity C-reactive protein (hs-CRP), serum amyloid-associated protein (SAA) and N-terminal pro B-type natriuretic peptide (NT-proBNP) levels, and reversible myocardial ischaemia during cardiovascular exercise tests and to determine whether these biomarkers could predict transient myocardial ischaemia. Ninety-six patients (36 ...
Ciolac Emmanuel G - - 2011
Exercise training is an effective intervention for treating and preventing hypertension, but its effects on heart rate (HR) response to exercise and cardiorespiratory fitness (CRF) of non-hypertensive offspring of hypertensive parents (FH+) has not been studied. We compared the effects of three times per week equal-volume high-intensity aerobic interval (AIT) ...
Kirby Brett S - - 2011
The ability to modulate sympathetic α-adrenergic vasoconstriction in contracting muscle is impaired with age. In young adults, adenosine triphosphate (ATP) has been shown to blunt sympathetic vasoconstrictor responsiveness similar to exercise. Therefore, we tested the hypothesis that modulation of postjunctional α-adrenergic vasoconstriction to exogenous ATP is impaired in ageing humans.We ...
Adser H - - 2011
Aim:  The aim of the present study was to test the hypothesis that interleukin-6 plays a role in exercise-induced PGC-1α and TNFα mRNA responses in skeletal muscle and to examine the potential IL-6 mediated AMPK regulation in these responses. Methods:  Whole body IL-6 knockout and wildtype (WT) male mice (4 ...
Hager Alfred - - 2011
Background: Even after excellent repair of aortic coarctation without restenosis there are limitations in exercise capacity at long-term follow-up. This study was performed to assess the contribution of inherited genomic polymorphisms to exercise capacity in patients without restenosis. Patients and methods: 122 patients aged 17-72 years, 46 female, 76 male, ...
Maarbjerg Stine J - - 2011
Exercise counteracts insulin resistance and improves glucose homeostasis in many ways. Apart from increasing muscle glucose uptake quickly, exercise also clearly increases muscle insulin sensitivity in the post exercise period. This review will focus on the mechanisms responsible for this increased insulin sensitivity. It is believed that increased sarcolemmal content ...
Van De Bruaene Alexander - - 2011
Volume overload of the pulmonary circulation in patients with atrial septal defect (ASD)-type secundum causes pulmonary vascular disease over a long period of time. This study aimed at (1) evaluating pulmonary vascular resistance (PVR) and (2) investigating the relation between PVR and exercise capacity in patients with open and closed ...
de Liefde Inge I - - 2011
BACKGROUND: The clinical value of exercise ankle brachial index (ABI) is still unclear, especially in patients with normal resting ABI. METHOD: 2164 patients performed a single-stage treadmill exercise test to diagnose or evaluate PAD. The population was divided into two groups: a normal resting ABI (resting ABI≥0.90) and PAD (resting ...
Green Jackson G - - 2011
Exercise has the potential to alleviate the resistance to insulin-mediated glucose uptake precipitated by elevated circulating free fatty acids (FFAs) in conditions such as obesity, lipid infusion, and starvation. In this study, 6 lean healthy men underwent two 3-day periods of starvation with either no exercise or daily endurance exercise ...
Borel Benoit - - 2011
BACKGROUND: The aim of this study was to evaluate the occurrence and severity of mechanical ventilatory constraints in healthy prepubescent children during continuous and intermittent exercise. METHODS: Twelve prepubescent children (7-11 years old) performed 7 exercises on a treadmill: one graded test for the determination of maximal aerobic speed (MAS), ...
Prado Eduardo Seixas - - 2011
Hyperammonaemia is related to both central and peripheral fatigue during exercise. Hyperammonaemia in response to exercise can be reduced through supplementation with either amino acids or combined keto analogues and amino acids (KAAA). In the present study, we determined the effect of short-term KAAA supplementation on ammonia production in subjects ...
Thrush A Brianne - - 2011
Ceramide accumulation has been implicated in the impairment of insulin-stimulated glucose transport in skeletal muscle following saturated fatty acid (FA) exposure. Importantly, a single bout of exercise can protect against acute lipid-induced insulin resistance. The mechanism by which exercise protects against lipid-induced insulin resistance is not completely known, but may ...
Cilli Aykut - - 2011
To address the yield of routine exercise stress testing as a screening tool for subclinical coronary artery disease (CAD) in patients with moderate to severe obstructive sleep apnea (OSA). A cross-sectional study in a university hospital. Of 380 consecutive patients with OSA, data from 206 subjects (mean apnea-hypopnea index [AHI] ...
Knab Amy M - - 2011
INTRODUCTION:: The magnitude and duration of the elevation in resting energy expenditure following vigorous exercise have not been measured in a metabolic chamber. This study investigated the effects of inserting a 45-min vigorous cycling bout into the daily schedule versus a controlled resting day on 24-h energy expenditure in a ...
Thatcher Joanne - - 2011
We examined the hypothesis that congruence between motivational dominance and state results in optimal psychological responses and performance during exercise. Twenty participants (10 telic dominant and 10 paratelic dominant) rated their stress at 5 min intervals as they cycled on an ergometer at gas exchange threshold for 30 min in both telic ...
Price Mike J - - 2011
We examined the effects of concomitant increases in crank rate and power output on incremental arm crank ergometry. Ten healthy males undertook three incremental upper body exercise tests to volitional exhaustion. The first test determined peak minute power. The subsequent tests involved arm cranking at an initial workload of 40% ...
Zafeiridis Andreas - - 2011
This study assessed the extent of aerobic system activation in young adolescents and men during heavy continuous (HC), short-interval (SI), and long-interval (LI) aerobic exercise protocols, and compared this response between the 2 age groups in the 3 protocols. Ten young adolescents (aged 13.2 ± 0.3 years) and 10 men (aged 21.0 ± 1.6 years) ...
Kukuła Krzysztof - - 2011
VIF-CAD randomized, placebo-controlled, double-blind trial was an attempt to induce therapeutic angiogenesis by percutaneous intramyocardial transfer of bicistronic (vascular endothelial growth factor/fibroblast growth factor [VEGF/FGF]) plasmid (pVIF) in patients with refractory heart ischemia. Myocardial perfusion, clinical symptoms, exercise tolerance, left ventricular function, and safety were assessed. Fifty-two patients with refractory ...
Casey Darren P - - 2011
We tested the hypotheses that (1) the compensatory vasodilatation in skeletal muscle during hypoxic exercise is attenuated in ageing humans and (2) local inhibition of nitric oxide (NO) synthesis in the forearm of ageing humans will have less impact on the compensatory dilatation during rhythmic exercise with hypoxia, due to ...
Mandroukas Athanasios - - 2011
Mandroukas, A, Heller, J, Metaxas, TI, Sendelides, T, Riganas, C, Vamvakoudis, E, Christoulas, K, Stefanidis, P, Karagiannis, V, Kyparos, A, and Mandroukas, K. Cardiorespiratory and metabolic alterations during exercise and passive recovery after three modes of exercise. J Strength Cond Res 25(X): 000-000, 2011-The objective of this study was to ...
Murakami Taro - - 2011
An acute bout of exercise induces repression of protein synthesis in skeletal muscle due in part to reduced signaling through the mammalian target of rapamycin complex 1 (mTORC1). Previous studies have shown that upregulated expression of regulated in DNA damage and development (REDD) 1 and 2 is an important mechanism ...
Yamada Tomohide - - 2011
Slow heart rate recovery (HRR) predicts all-cause mortality. This study investigated the relationship between silent myocardial ischemia (SMI) and HRR in type 2 diabetes. The study enrolled 87 consecutive patients with type 2 diabetes and no chest symptoms. They underwent treadmill exercise testing and single-photon emission computed tomography imaging with ...
Tanskanen Minna M - - 2011
We hypothesized that increased oxidative stress and disrupted redox balance may be predisposing factors and markers for overreaching (OR). PURPOSE:: To examine whether oxidative stress markers and antioxidant status and physical fitness are related to overreaching during an 8-week military basic training (BT) period. METHODS:: Oxidative stress and antioxidant status ...
< 2 3 4 5 6 7 8 9 10 11 12 >