Search Results
 Results 451 - 500 of 1353 < 5 6 7 8 9 10 11 12 13 14 15 > 451 Rivera-Brown Anita M - - 2012 Physical activity and fitness are associated with a lower prevalence of chronic diseases, such as heart disease, cancer, high blood pressure, and diabetes. This review discusses the body's response to an acute bout of exercise and long-term physiological adaptations to exercise training with an emphasis on endurance exercise. An overview ... 452 Xi-Qing Sun - - 2012 It has been demonstrated that individuals exposed to actual or simulated microgravity often experience cardiovascular dysfunctions when returning to Earth. The underlying mechanisms of orthostatic intolerance and countermeasure treatment are still poorly understood. In this paper, the progress in the mechanism of cardiovascular deconditioning from the view of vascular remodeling, ... 453 George Keith - - 2012 The impact of endurance exercise training on the heart has received significant research and clinical attention for well over a century. Despite this, many issues remain controversial and clinical interpretation can be complex of biomarkers of cardiomyocyte insult. This review assesses the current state of knowledge related to two areas ... 454 Heydari Mehrdad - - 2012 OBJECTIVE: The effect of 12 weeks of high-intensity intermittent exercise (HIIE) on cardiac, vascular, and autonomic function of young males was examined. METHODS: Thirty-eight young men with a BMI of 28.7 ± 3.1 kg m(-2) and age 24.9 ± 4.3 years were randomly assigned to either an HIIE or control group. The exercise group underwent HIIE three times ... 455 Mezzani Alessandro - - 2012 Aerobic exercise intensity prescription is a key issue in cardiac rehabilitation, being directly linked to both the amount of improvement in exercise capacity and the risk of adverse events during exercise. This joint position statement aims to provide professionals with up-to-date information regarding the identification of different exercise intensity domains, ... 456 Mezzani Alessandro - - 2012 Aerobic exercise intensity prescription is a key issue in cardiac rehabilitation, being directly linked to both the amount of improvement in exercise capacity and the risk of adverse events during exercise. This joint position statement aims to provide professionals with up-to-date information regarding the identification of different exercise intensity domains, ... 457 Mainguy Vincent - - 2012 Exercise tolerance in pulmonary arterial hypertension (PAH) is most commonly assessed by the 6-min walk test (6MWT). Whether endurance exercise tests are more responsive than the 6MWT remain unknown.Twenty stable PAH patients (mean age: 53[15]; mean pulmonary arterial pressure: 44[16]) already on PAH monotherapy completed the 6MWT, the endurance shuttle ... 458 Arazi Hamid - - 2013 To investigate the blood pressure responses during recovery after two protocols of circuit resistance exercises (CRE) with different rest intervals (RI). Eleven normotensive males (aged 19.5 ± 1.0 yrs, height 172.8 ± 5.7 cm and weight 65.1 ± 8.1 kg) performed two CRE with RI of 30 (RI30s) and 40 ... 459 Roberto Zamunér Antonio - - 2012 Abstract This study aimed to evaluate the autonomic modulation of heart rate in sedentary paraplegics and paraplegic wheelchair basketball players with thoracic spinal cord injury below T6. Seven paraplegic wheelchair basketball players (active paraplegic group), five paraplegics who were not involved in regular exercise (sedentary paraplegic group) and 10 able-bodied ... 460 Saeterbakken Atle Hole - - 2012 ABSTRACT: Little is known about the effect of performing upper-body resistance exercises with dumbbells versus barbells and standing versus seated. Therefore, this study sought to compare electromyogram activity (EMG) and one-repetition maximum (1-RM) in barbell and dumbbell shoulder presses performed seated and standing. 15 healthy men volunteered for 1-RM and ... 461 Lucini Daniela - - 2012 Overweight (OW) and obesity in children are important forerunners of cardiovascular risk, possibly through autonomic nervous system (ANS) dysregulation, while physical exercise exerts a beneficial influence. In this observational study we hypothesise that OW might influence ANS profile even in a population performing high volume of supervised exercise. We study ... 462 Dogan Umuttan - - 2012 Increased sympathetic activity and endothelial dysfunction are the proposed mechanisms underlying exaggerated blood pressure response to exercise (EBPR). However, data regarding heart rate behavior in patients with EBPR are lacking. We hypothesized that heart rate recovery (HRR) could be impaired in patients with EBPR. A total of 75 normotensive subjects ... 463 Hargens Alan R - - 2012 When applied individually, exercise countermeasures employed to date do not fully protect the cardiovascular and musculoskeletal systems during prolonged spaceflight. Recent ground-based research suggests that it is necessary to perform exercise countermeasures within some form of artificial gravity to prevent microgravity deconditioning. In this regard, it is important to provide ... 464 Kwon Young Sub - - 2012 ABSTRACT: The widespread belief that local cooling impairs short-term, strenuous exercise performance is controversial. Eighteen original investigations involving cooling before and intermittent cooling during short-term, intensive exercise are summarized in this review. Previous literature examining short-term intensive exercise and local cooling primarily has been limited to the effects on muscle ... 465 Tibana R A - - 2012 This investigation was designed to evaluate responses of blood pressure (BP) following an acute resistance exercise (RE) session. Middle-aged women (N=13) who were classified as overweight (N=8) or obese (N=5) according to body mass index (BMI) participated in the investigation. Participants were randomly submitted to a control session (30-min seated ... 466 White Michael J - - 2012 Muscle metabo- and mechanoreflexes are known to influence systemic cardiovascular responses to exercise. Whether interplay between these reflexes is operant in the control of the pulmonary vascular response to exercise is unknown. The aim of this study was to assess the pulmonary vascular response to the combined activation of the ... 467 Doonan Robert J - - 2012 There is controversy as to whether there are sex differences in arterial stiffness. Acute physical stress can elicit vascular abnormalities not present at rest. Our objective was to assess sex differences in arterial stiffness at rest and in response to acute physical stress. Healthy young men (n=67) and women (n=55) ... 468 Bothe Nina - - 2012 INTRODUCTION: Physical activity activates brain regions and transmitter systems that represent the reward system (i.e., the ventral striatum (VS) and dopamine (DA)). To date, the effect of training status and acute exercise on reward processing have not been investigated systematically in humans. To address this issue, we examined highly trained ... 469 McMorris Terry - - 2012 The primary purpose of this study was to examine, using meta-analytical techniques, the differential effects of differing intensities of acute exercise on speed and accuracy of cognition. Overall, exercise demonstrated a small, significant mean effect size (g=0.14, p<0.01) on cognition. Examination of the comparison between speed and accuracy dependent variables ... 470 Peterson Mark D - - 2012 OBJECTIVE: To examine the feasibility and potential benefits of using the NuStep® Recumbent Cross Trainer for non-ambulatory adults with cerebral palsy (CP). DESIGN: Observational SETTING: Clinical center for CP treatment and rehabilitation. PARTICIPANTS: Significantly motor-impaired adults with CP (N = 11) with a mean age ± SD of 36.3 ± ... 471 Chen Chi-Wen - - 2012 BACKGROUND: Nowadays, most adolescents with mild congenital heart disease (CHD) undergo medical or surgical correction in early childhood for their congenital anomalies. There is a need to examine the determinants of exercise behaviour among adolescents (CHD) who are able to exercise. AIMS: The aims of this study were to examine ... 472 Low David A - - 2012 The autonomic nervous system closely integrates a range of vital processes, including, cardiovascular function. Physical activity, or exercise, requires a range of integrated autonomic and cardiovascular adjustments in order to maintain homeostasis. Pathological conditions that result in dysfunction of the autonomic nervous system, such as autonomic failure, can therefore jeopardize ... 473 Goldie Catherine L - - 2012 The effects of a 12-week low-intensity exercise conditioning program (walking) on blood pressure (BP), heart rate (HR), rate- pressure product (RPP), and cardiac autonomic function were measured in 40 sedentary women with hypertension. Women were assigned to either an exercise group (n = 20) or a control group (n = ... 474 Lu Frank Jing-Horng - - 2012 The purpose of this study was to examine the associations of exercise identity, exercise commitment, exercise dependence, and, particularly, the mediating effects of exercise commitment on the relationship between exercise identity and exercise dependence. 253 Taiwanese regular exercisers completed measures, including the Exercise Dependence Scale-Revised, the Exercise Identity Scale, the ... 475 Paolillo Stefania - - 2012 Patients affected by pulmonary arterial hypertension (PAH) show a reduced exercise tolerance with early occurrence of dyspnoea and fatigue. The origin of functional capacity limitation is multifactorial and several mechanisms have been proposed, including right heart failure, which leads to a limited increase in cardiac output during exercise, and hyperventilation ... 476 Park Mi-Youn - - 2012 Exercise-induced atrioventricular (AV) block in patients with normal AV conduction at rest is rare. Herein, we describe the case of a 67-year-old woman with normal 1 : 1 AV conduction at rest, who developed complete AV block during a treadmill test. Our patient complained of effort-related dizziness and dyspnea, which ... 477 Calbet Jose A L JA Department of Physical Education, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira, Las Palmas de Gran Canaria, 35017, Spain. - - 2012 Maximal exercise vasodilatation results from the balance between vasoconstricting and vasodilating signals combined with the vascular reactivity to these signals. During maximal exercise with a small muscle mass the skeletal muscle vascular bed is fully vasodilated. During maximal whole body exercise, however, vasodilatation is restrained by the sympathetic system. This ... 478 Iwase Michiko - - 2012 Previously, we undertook simultaneous recording of ventilation and pulmonary gas exchange in mice. These studies revealed that dopamine D2 receptors participate in exercise hyperpnoea via behavioural control of ventilation with unchanged pulmonary gas exchange. Here we examined the hypothesis that D1 receptors also contribute to exercise hyperpnoea using the simultaneous ... 479 Purkayastha Sushmita - - 2012 Abstract: We tested the hypothesis that pharmacologic blockade of α-1 adrenoreceptor (prazosin), at rest and during steady-state dynamic exercise would impair cerebral autoregulation (CA) and result in cerebral vasodilatation in healthy humans. In ten subjects beat-to-beat mean arterial pressure (MAP) and mean middle cerebral artery blood velocity (MCA V) were ... 480 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 ... 481 Muller Matthew D MD Penn State University College of Medicine, Heart and Vascular Institute, Hershey, PA 17033, - - 2012 Exaggerated blood pressure (BP) responses to dynamic exercise predict cardiovascular mortality in patients with peripheral arterial disease (PAD). However, the underlying mechanisms are unclear and no attempt has been made to attenuate this response using antioxidants. Three physiological studies were conducted in patients with PAD and controls. In Protocol 1, ... 482 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 ... 483 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 ... 484 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 ... 485 Casey Darren P DP Department of Anesthesiology, Mayo Clinic, Rochester, MN 55905, USA. - - 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 ... 486 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 ... 487 Mortensen S P SP The Copenhagen Muscle Research Centre, Rigshospitalet, Section 7641, Blegdamsvej 9, DK-2100 Copenhagen Ø, Denmark. - - 2012 Ageing is associated with an impaired ability to modulate sympathetic vasoconstrictor activity (functional sympatholysis) and a reduced exercise hyperaemia. 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 signalling is altered ... 488 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 ... 489 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 ... 490 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 ... 491 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, ... 492 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, ... 493 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 ... 494 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 ... 495 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 ... 496 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) ... 497 Biondi Olivier O Universite Paris Descartes - CESEM UMR 8194, 45 rue des Saints Peres, Paris 75006, France. - - 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 ... 498 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 ... 499 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 ... 500 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 ... < 5 6 7 8 9 10 11 12 13 14 15 >