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 Results 401 - 450 of 1269 < 4 5 6 7 8 9 10 11 12 13 14 > 401 Koelwyn G J - - 2012 Hypoxia with exercise is commonly used to enhance physiological adaptation in athletes, but may prolong recovery between training bouts. To investigate this, heart rate variability (HRV), systemic immune response, and response to an orthostatic challenge were measured following exercise in hypoxia and air. Eleven trained men performed a 10-km cycling ... 402 Muller Matthew D - - 2012 Exaggerated blood pressure (BP) responses to dynamic exercise predict cardiovascular mortality in peripheral arterial disease (PAD) patients. However, the underlying mechanisms are unclear and no attempt has been made to attenuate this response using antioxidants. Three physiological studies were conducted in PAD patients and controls. In Protocol 1, subjects underwent ... 403 Roque Fernanda R - - 2012 BACKGROUND AND PURPOSE: Regular physical activity is an effective non-pharmacological therapy for prevention and control of hypertension. We investigated the effects of aerobic exercise training in vascular remodeling and in the mechanical and functional alterations of coronary and small mesenteric arteries from spontaneously hypertensive rats (SHR). EXPERIMENTAL APPROACH: Normotensive Wistar ... 404 Mendonca Goncalo V - - 2012 Persons with Down syndrome (DS) are at high risk for cardiovascular morbidity and mortality, and there is compelling evidence of autonomic dysfunction in these individuals. The main purpose of this study was to determine whether a combined aerobic and resistance exercise intervention produces similar results in cardiac autonomic function between ... 405 Weber Tobias - - 2013 The impact of whole-body vibration (WBV) upon the cardiovascular system is receiving increasing attention. Despite numerous studies addressing the acute cardiovascular effects of WBV training, very little is known regarding long-term adaptations in healthy humans. A 6-week training study, with a 70 days follow-up was designed to compare resistive exercise with ... 406 Dipla K - - 2012 The aim was to investigate the hemodynamic responses to isometric handgrip exercise (HG) and examine the role of the muscle metaboreflex in the exercise pressor response in individuals with intellectual disability (IID) and non-disabled control subjects. Eleven males with mild-moderate intellectual disabilities and eleven non-disabled males performed a testing protocol ... 407 Casey Darren P - - 2012 Hypoxia can have profound influences on the circulation. In humans, acute exposure to moderate hypoxia has been demonstrated to result in vasodilatation in the coronary, cerebral, splanchnic and skeletal muscle vascular beds. The combination of submaximal exercise and hypoxia produces a "compensatory" vasodilatation and augmented blood flow in contracting skeletal ... 408 Tocco F - - 2012 AIM: Considering that sympathetic activation is induced by exercise, it is reasonable to assume that hemodynamic adjustments to exercise act in opposition to those elicited by the diving response. However, cardiovascular measurements have never been performed during underwater dynamic apnoea (DA), and this hypothesis remains speculative. METHODS: Data concerning heart ... 409 Mortensen Stefan P - - 2012 Ageing is associated with an impaired ability to modulate sympathetic vasoconstrictor activity (functional sympatholysis) and a reduced exercise hypaeremia. The purpose of this study was to investigate whether a physically active lifestyle can offset the impaired functional sympatholysis and exercise hyperaemia in the leg and whether ATP signaling is altered ... 410 Madden K M - - 2012 There is a well-established relationship between increased arterial stiffness and cardiovascular mortality. We examined whether a long-term aerobic exercise intervention (6 months) would increase arterial compliance in older adults with hypertension complicated by Type 2 diabetes (T2DM) and hyperlipidemia. A total of 52 older adults (mean age 69.3±0.6 years, 30 ... 411 Taylor Ryan P - - 2012 Reactive oxygen species (ROS) have been reported to play a primary role in triggering the cardioprotective adaptations by some preconditioning procedures, but whether they are required for exercise-induced preconditioning is unclear. Thus in this study we used the free radical scavenger N-(2-mercaptopropionyl)glycine (MPG) to test the hypothesis that ROS is ... 412 Chaubet V - - 2012 This study aim was to compare the effects of unilateral knee extensor fatigue induced by electrically stimulated (ES) and voluntary (VOL) contractions on postural control during bipedal stance. Seventeen healthy active males (21.5±2 years) completed these two fatiguing exercises of the quadriceps femoris muscle. Both exercises were of equal duration ... 413 Lucini Daniela - - 2012 Considering that changes in exercise routines might have relevance in treatment of adolescents with type 1 diabetes mellitus, we sought to assess whether spontaneous modifications to weekly exercise habits might occur in these patients and whether such variations would be accompanied by alterations in autonomic profile. In this observational study, ... 414 Zhang Anjing - - 2012 The current study explored the effects of treadmill exercise intensity on functional recovery and hippocampal phospho-NR2B (p-NR2B) expression in cerebral ischemic rats, induced by permanent middle cerebral artery occlusion (MCAO) surgery. Adult male Sprague-Dawley rats were randomly divided into four groups, including sham, no exercise (NE), low intensity training (LIT, ... 415 Chifamba Jephat - - 2012 Aim: The objective of the study was to compare blood pressure changes during exercise between low and normal birth weight young Black adults. Methods: Eighty medical students in their first and second year who had neonatal clinic cards as proof of birth weight were included in the study. Resting blood ... 416 Afroundeh R - - 2012 To determine that whether arterial carbon dioxide (PaCO2) affects ventilation ($\dot V$E) during recovery from impulse-like exercises of various intensities, subjects performed four impulse-like tests with different workloads. Each test consisted of a 20-sec impulse-like exercise at 80 rpm and 60-min recovery. Blood samples were collected at rest and during ... 417 Michaelides Andreas P - - 2012 ST-segment changes during exercise testing can be attributed mainly to ischemia, but also, in some patients, to other physiological parameters, such as body position or hyperventilation, making ECG exercise test interpretation more complex. Here we describe the case of a patient who had an electrocardiographically positive exercise test, in order ... 418 Christensen Peter Moller - - 2012 In response to hypoxic breathing most studies report slower pulmonary oxygen uptake (VO(2)) kinetics at the onset of exercise, but it is not known if this relates to an actual slowing of the VO(2) in the active muscles. The aim of the present study was to evaluate whether thigh VO(2) ... 419 Biondi Olivier - - 2012 Spinal muscular atrophy (SMA), the leading genetic cause of death in infants worldwide, is due to the misexpression of the survival of motor neuron protein, causing death of motor neurons. Several clinical symptoms suggested that, in addition to motor neurons, the autonomic nervous systems could be implicated in the cardiac ... 420 Ozaki Kenichi - - 2012 OBJECTIVE: To examine the efficacy of postural strategy training using a personal transport assistance robot for patients with central nervous system disorders. DESIGN: Single group intervention trial. SETTING: Rehabilitation center at a university hospital. PARTICIPANTS: Eight outpatients (mean age, 50±13 years; male/female ratio, 5/3) with gait disturbance (mean time after ... 421 Mastelari Rosiane Batista - - 2012 The paraventricular nucleus of hypothalamus (PVN) is a well known site of integration for autonomic and cardiovascular responses, and the glutamate neurotransmitter plays an important role. The aim of our study was to evaluate the cardiovascular parameters and autonomic modulation by means of spectral analysis after ionotropic glutamate receptor inhibition ... 422 Stepanovic Jelena - - 2012 The aims of this study were to investigate the incidence and parameters associated with myocardial ischemia during mental stress (MS) as measured by echocardiography and to evaluate the relation between MS-induced and exercise-induced myocardial ischemia. Study participants were 79 patients (63 men; mean [M] [standard deviation {SD}] age = 52 ... 423 Sivasankar M Preeti - - 2012 OBJECTIVE: Low humidity environments and mouth breathing may contribute to superficial vocal fold dehydration. The purpose of this study was to investigate the effects of obligatory mouth breathing, during daily activities in low- and high-humidity environments, on voice measures. The activities included 15 minutes of obligatory mouth breathing alone, during ... 424 Tsuji Bun - - 2012 Elevation of core temperature leads to increases in ventilation in both resting subjects and those engaged in prolonged exercise. We compared the characteristics of the hyperthermic hyperventilation elicited during passive heating at rest and during prolonged moderate and light exercise. Twelve healthy men performed three trials: a rest trial in ... 425 Smith K J - - 2012 We investigated regional changes in cerebral artery velocity during incremental exercise while breathing normoxia (21% O(2)), hyperoxia (100% O(2)) or hypoxia (16% O(2)) [n=10; randomized cross over design]. Middle cerebral and posterior cerebral arterial velocities (MCAv and PCAv) were measured continuously using transcranial Doppler ultrasound. At rest, only PCAv was ... 426 Boiten Hendrik J - - 2012 Exercise (99m)Tc-tetrofosmin single-photon emission computed tomography (SPECT) is a useful tool for short- and medium-term risk stratifications. Currently, the long-term prognostic application of this technique has not been evaluated. Exercise (99m)Tc-tetrofosmin was performed in 655 consecutive patients. Ten patients who underwent revascularization <60 days after nuclear testing were excluded from ... 427 Louvaris Zafeiris - - 2012 Some reports suggest that heliox breathing during exercise may improve peripheral muscle oxygen availability in patients with chronic obstructive pulmonary disease (COPD). Besides COPD patients who dynamically hyperinflate during exercise (hyperinflators), there are patients who do not hyperinflate (non-hyperinflators). As heliox breathing may differently affect cardiac output in hyperinflators (by ... 428 Seo Jeong-Sook - - 2012 Background: The aim of the present study was to evaluate the mechanism of diastolic dysfunction (DD) after aortic valve replacement (AVR) in patients with aortic stenosis (AS). Methods and Results: Supine bicycle exercise Doppler echocardiography (EDE) with measurement of early diastolic peak velocities of transmitral flow (E) and mitral septal annular movement ... 429 Dobšák Petr - - 2012 Neuromuscular electrical stimulation (NMES) of leg muscles has been introduced in clinical practice as a rehabilitation (RHB) method in patients with chronic heart failure (CHF); however, the role of NMES on the reduction of arterial stiffness and autonomic disbalance in these patients has not yet been studied. Sixty-one patients with ... 430 Gayda Mathieu - - 2012 J Clin Hypertens (Greenwich). 2012;00:00-00 ©2012 Wiley Periodicals, Inc. The effects of sauna alone vs exercise and sauna on ambulatory blood pressure monitoring and central hemodynamic variables were measured in 16 patients with untreated hypertension assigned to a control period, sauna, or exercise and sauna. Exercise and sauna had positive ... 431 Jurrens Traci L - - 2012 BACKGROUND: Some experts have suggested that patients with exaggerated blood pressure responses during exercise echocardiography are more likely to have abnormal exercise echocardiographic findings and less likely to have angiographically significant coronary artery disease than patients with normal blood pressure responses. The aim of this study was to evaluate the ... 432 Pollonini Luca - - 2012 Current methods for monitoring exercise exertion rely upon heart rate monitors, which represent a crude and lagging indicator of conditioning. The rationale for the present study is that both systemic and local metabolic mechanisms are responsible for physical performance, and therefore they should be simultaneously quantified to achieve an objective ... 433 Farah Breno Q - - 2012 This investigation analyzed the effect of rest interval length on the rating of perceived exertion (RPE) during a resistance exercise session. Nineteen males performed two experimental sessions: resistance exercise with 30-sec. rest intervals (E30) and 90-sec. rest intervals (E90). In both sessions, five exercises (bench press, knee extension, seated row, ... 434 Laouini Ghailen - - 2012 In this paper, we analyze the heart rate variability (HRV), obtained by using the time-varying integral pulse frequency modulation (TVIPFM) which is well adapted to the exercise stress testing. 435 Burdyukova E V - - 2012 Schoolchildren overloaded with learning do not have time to exercise and often have hypodynamia. Namely they show primarily such negative effects of hypokinesia as incorrect posture, insufficient muscular development, and obesity. Lack of physical activity has acute effect on the formation of the cardiovascular system in schoolchildren. Here we assess ... 436 DeBoer Lindsey B - - 2012 Anxiety disorders constitute a significant public health problem. Current gold standard treatments are limited in their effectiveness, prompting the consideration of alternative approaches. In this review, we examine the evidence for exercise as an intervention for anxiety disorders. This evidence comes from population studies, studies of nonclinical anxiety reduction, as ... 437 Otto J M - - 2012 BACKGROUND AND AIMS: Aerobic exercise capacity appears impaired in children with inflammatory bowel disease (IBD). Whether this holds true in adults with IBD is not known. Using cardiopulmonary exercise testing (CPET), we assessed anaerobic threshold (AT) in such patients comparing data with reference values and other elective surgical patients. We ... 438 Erol Tansel - - 2012 Behçet's disease (BD) is a chronic multi-system disease presenting with recurrent oral and genital ulceration, and relapsing uveitis. Heart rate recovery (HRR) after exercise is a marker of parasympathetic activity. A delayed recovery of systolic blood pressure (SBP) after exercise might reflect sympathetic hyperactivity. The analysis of variations in heart ... 439 Carter Holly - - 2012 In this article, we analyze feedback from simulated casualties who took part in field exercises involving mass decontamination, to gain an understanding of how responder communication can affect people's experiences of and compliance with decontamination. We analyzed questionnaire data gathered from 402 volunteers using the framework approach, to provide an ... 440 Kopeć Grzegorz - - 2012 Differences in clinical effects between selective and dual endothelin (ET) receptor antagonists (ERA) in patients with pulmonary arterial hypertension (PAH) are currently unknown. We aimed to assess prospectively how transition from selective (sitaxsentan) to dual (bosentan) ERA affected exercise capacity and cardiocirculatory performance in patients with Eisenmenger's syndrome. A series ... 441 Elia Davide - - 2012 Background: It is not known whether respiratory muscle fatigue occurs as a consequence of exercise in patients with interstitial lung disease (ILD) and, if so, to what extent it is related to changes in dynamic lung volumes. Objectives: To assess the development of respiratory muscle fatigue in patients with ILD ... 442 Hummel Yoran M - - 2012 Decreased exercise capacity is the main symptom in patients with heart failure (HF). We assessed the association among noninvasively determined maximal cardiac output at exercise, systolic and diastolic cardiac functions at rest, and peak oxygen uptake (pVo(2)) exercise capacity in patients with congestive HF. We studied 102 patients 62 ± ... 443 McDiarmid Adam - - 2012 The aim of this study was to determine the effects of the HeartWare left ventricular assist device (HVAD) (HeartWare International, Inc, Framingham, MA) on hemodynamics, ventricular function, and exercise capacity. Between July 2009 and March 2011, 46 patients with advanced heart failure had implantation of the HVAD. Of these patients, ... 444 Cagliyan Caglar Emre - - 2012 Introduction: Dynamic mitral regurgitation (MR) is frequently investigated in patients with left ventricular systolic dysfunction (LVSD). Data about the dynamic MR in patients with organic valve disease are limited. The aim of this study was to evaluate the alteration of MR by exercise in patients with rheumatic valve disease (RVD). ... 445 Lalande Sophie - - 2012 PURPOSE: To investigate the effect of changes in expiratory intrathoracic pressure (ITP) on stroke volume (SV) at rest and during moderate exercise in patients with heart failure vs. healthy individuals. METHODS: SV was obtained by echocardiography during spontaneous breathing and during expiratory loads of 5 and 10 cmH2O produced by ... 446 Iellamo Ferdinando - - 2012 BACKGROUND: The best format of exercise training in patients with chronic heart failure (CHF) is controversial. We tested the hypothesis that aerobic continuous training (ACT) and aerobic interval training (AIT) induce similar effects on functional capacity, central hemodynamics and metabolic profile in patients with postinfarction CHF provided that the training ... 447 Lepage Marie L - - 2012 AIM: Research suggests that exercise absence is frequently associated with greater guilt and negative affect, particularly when obligatory exercise beliefs and eating disordered psychopathology are considered. Two separate studies used ecological momentary assessment (EMA) to examine differences in mood on exercise and non-exercise days and the moderating impact of obligatory ... 448 Sharma Shalini - - 2012 In COPD, overactivation of ergoreceptors may be a link between peripheral changes, sympathetic over activation and increased hemodynamic and ventilatory responses to exercise. The current study was undertaken to test the hypothesis that, ergoreflex in COPD patients is hyperactive and contributes to breathlessness and exercise limitation. The aim of study ... 449 Schomacher Jochen - - 2012 The semispinalis cervicis muscle displays reduced and less defined activation in patients with neck pain which is associated with increased activity of the splenius capitis muscle. Exercises to selectively activate the semispinalis cervicis muscle may be relevant for patients with neck pain however the most appropriate type of exercise has ... 450 Dion Gregory R - - 2012 OBJECTIVE: Laryngomalacia is best known as a self-resolving infantile disorder characterized by inspiratory stridor with occlusion of the larynx by collapse of arytenoid tissues due to Bernoulli forces. Adult laryngomalacia has been sporadically described in the literature. We identified a series of patients with aerodynamic supraglottic collapse mimicking laryngomalacia in ... < 4 5 6 7 8 9 10 11 12 13 14 >