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Andreou E - - 2012
Background and Aims: To measure the prevalence of overweight and obesity in adults in the Republic of Cyprus, and to evaluate and relate possible obesity risk factors of the adult Cypriot population. Methods: This is an epidemiological cross-sectional study on a stratified random sample of 1001 (48.5% males-51.5% females) subjects, ...
Fortier Sylvie - - 2012
The definition of proprioception in the literature is equivocal, therefore it is desirable for communication and comprehension purposes that all authors who use proprioception and its related terms reach a consensus as to their meaning. This review aims to clarify these terms and to improve the understanding of the proprioceptive ...
Pettitt Robert W - - 2012
Standardized graded exercise test (GXT) protocols are ineffective for testing endurance athletes. Scientists have called for the abandonment of traditional techniques for corroborating "true" maximum oxygen uptake (VO2max), as measured during a GXT. Instead, a new technique, the verification bout subsequent to the GXT, has emerged for establishing the "true" ...
Haouzi Philippe - - 2012
We have found in four sheep that, following a muscular exercise, minute ventilation is maintained for 34-131s during a cardiac arrest (CA), at a magnitude (from 28.2 and 54.7lmin(-1)) similar to the level of ventilation (and thus proportional to the metabolic rate) preceding the period of asystole. Breathing was maintained ...
Gleyse J - - 2012
The long history of the conception of physical exercise in France may be viewed as a function of a series of changes in understanding the body. Scientific concepts were used to present the body in official texts by authors specializing in the subject, or to describe them, as did Michel ...
Spurway N C - - 2012
Abstract Three modern views about the factors limiting oxygen uptake in healthy humans are set against the original (early 1920s) concept of A. V. Hill and colleagues. The majority view for most of the intervening time has been that cardiac output is the essential limiting function. Among recent research in ...
Chang Ya-Ju - - 2012
The aim of this study was to examine the change of the intermuscular cross-correlation and coherence of the rectus femoris (RF), vastus medialis (VM) and vastus lateralis (VL) during exhausting stepping exercise. Eleven healthy adults repeated the stepping exercise up to their individual endurance limits (RPE score reached 20), and ...
Saunders Bryan - - 2012
β-alanine supplementation has been shown to improve high-intensity exercise performance and capacity. However, the effects on intermittent exercise are less clear, with no effect shown on repeated sprint activity. The aim of this study was to investigate the effects of β-alanine supplementation on YoYo Intermittent Recovery Test Level 2 (YoYo ...
Hwang In-Chang - - 2012
Although chronic effects of exercise on endothelial function are established, the impact of acute exercise on flow-mediated dilatation (FMD) of brachial artery has not been elucidated yet. Eighty-six young healthy volunteers were prospectively enrolled from January 2011 to December 2011. The subjects completed FMD tests at rest and immediately after ...
Gwin Joseph T - - 2012
Coherence between electroencephalography (EEG) recorded on the scalp above the motor cortex and electromyography (EMG) recorded on the skin of the limbs is thought to reflect corticospinal coupling between motor cortex and muscle motor units. Beta-range (13-30 Hz) corticomuscular coherence has been extensively documented during static force output while gamma-range ...
Xhauflaire-Uhoda Emmanuelle - - 2011
Background: Sweating is variably altered by physical exercise, diabetic neuropathy and antiperspirants. Methods: Skin temperature, skin surface water loss (SSWL), the Corneometer(®) average capacitance (CMAC) and skin capacitance mapping (SCM) were measured before and after moderate physical exercise in 20 healthy subjects. The effect of 5% aluminium chloride hexahydrate (ACH) ...
Temfemo Abdou - - 2011
Temfemo, A, Carling, C, and Ahmaidi, S. Relationship between power output, lactate, skin temperature and muscle activity during brief repeated exercises with increasing intensity. J Strength Cond Res 24(X): 000-000, 2011-The aim of this study was to assess the relationship between power output, lactate, skin temperature, and quadriceps muscle activity ...
Andrade R - - 2011
Introduction: The purpose of this study was to compare the electromyography index of muscle coactivation of the following muscle pairs: posterior deltoid and pectoralis major (PD/PM); triceps brachii and biceps brachii (TB/BB); and serratus anterior and upper trapezius (SA/UT) during three different closed kinetic chain exercises (wall-press, bench-press and push-up) ...
Martin Caroline - - 2011
The aim of this study was to compare tennis matches played on clay (CL) and resin (R) courts. Six matches were played (3 on CL courts and 3 on R courts) by 6 high-level players. Heart rate (HR) was monitored continuously while running time (4.66 m), and blood lactate concentration ...
Muller Matthew D - - 2011
Military and factory work often involves exposure to cold temperatures. With prolonged exposure, individuals report feeling cold and develop pain in their hands, both of which might be alleviated by endogenous heat production via exercise. The purpose of this study was to evaluate how interval (INT) and continuous (CONT) cycle ...
Zhou Yue - - 2010
OBJECTIVE: To investigate the feasibility of a non-invasive and instant method to evaluate the degree of exercise-induced muscle damage. METHODS: Thirteen male college athletes (23.4±1.0year, 180.03±3.51cm, 75.93±6.70kg) took part in the trial. Measures included serum creatine kinase (CK) after eccentric and endurance exercise, and surface electromyography (sEMG) during knee extension ...
Naqvi Tasneem Z - - 2010
Optimization of atrioventricular delay (AVD) and interventricular delay (VVD) in patients with a biventricular (Biv) pacemaker has been associated with improvement in cardiac output acutely, a reduction in heart failure symptoms, and improved exercise capacity. Several individual echocardiography (echo) Doppler parameters have been used for pacemaker optimization. In this review, ...
Bogaard Margot D - - 2010
Should We Optimize CRT During Exercise? Cardiac resynchronization therapy aims at diminishing cardiac dyssynchrony in patients with heart failure. The effect of cardiac resynchronization therapy can be improved by optimization of the atrioventricular (AV) and interventricular (VV) delays. Currently, optimization of these pacing settings is mainly performed during resting conditions. ...
Sy Raymond W - - 2010
Genotype and Exercise in LQTS. Repolarization dynamics during exercise in patients with long-QT Syndrome (LQTS) may be influenced by various factors such as a patient's genotype. We sought to systematically characterize the repolarization dynamics during exercise in patients with LQTS with a particular focus on the influence of genotype. Three ...
Linton Nick W F - - 2012
A 53-year-old man with previous aortic valve surgery presented with paroxysmal narrow complex tachycardia, induced by exercise. His PR interval was greater than 400 ms when in sinus rhythm and atrioventricular nodal reentry tachycardia (AVNRT) was diagnosed with invasive electrophysiological studies. Single echoes were repeatedly inducible with single-paced extrastimuli. Cryotherapy ...
Bag Asim K - - 2010
The educational objectives for this self-assessment module are for the participant to exercise, self-assess, and improve his or her understanding of the anatomy of the cavernous sinus and clinicoradiologic features of common cavernous sinus diseases.
Zhao Dongdong - - 2011
Framingham Study data indicate an incremental risk of cardiovascular death in relation to low exercise capacity in women. The reason for death is still not clear. QT restitution properties in 80 middle-aged women were investigated to confirm whether the cardiac restitution property was affected by the exercise capacity. Exercise tests ...
Hekkala Anna-Mari - - 2010
The identification of affected family members with long QT syndrome (LQTS) is often difficult due to their normal-or only marginally lengthened-QT interval duration. We examined whether physical exercise test could increase the ability to detect the mutation carrier status in phenotypically normal LQTS family members. Sixty-six subjects were included: 15 ...
Gondoni Luca A - - 2011
This study aims to describe the changes that a period of low-calorie diet and physical training determines in heart rate and in corrected QT (QTc) interval in obese patients with coronary heart disease (CHD) and to verify whether it is effective in shortening the QT interval using three different methods ...
Strauss Margit - - 2010
Aim of this study is to evaluate reproducibility, consistency and the impact of moderate exercise workload on optimized PV and VV delays as determined by the IEGM-based QuickOpt™ method (St. Jude Medical), that was shown to produce hemodynamic performance similar to that obtained by echo-guided aortic VTI maximization. Sixty patients ...
Johnson Nils P - - 2010
Exercise and QT dynamics during ambulatory monitoring impact mortality in a variety of populations. Heart rate recovery (HRR) after exercise is a known strong predictor of mortality. This study assessed the independent prognostic significance of the QT response to changing heart rate (QT dynamics) during recovery from exercise. The cohort ...
Uebing Anselm - - 2010
Inappropriate heart rate response to exercise - chronotropic incompetence - and exercise intolerance are common in patients with a systemic right ventricle. We aimed to assess the relationship between heart rate increase, oxygen consumption, and timing of the right ventricular cardiac cycle in this cohort. We prospectively studied nine patients ...
Brown Morgan R - - 2010
This study investigated the influence of performance level and exercise mode on the rowers' pacing strategies. On-water and indoor split times and placements (every 500-m) were obtained from individual 2000-m performances set at the elite, national and sub-elite competitive levels. The data was sorted into indoor (n=580) and on-water exercises ...
Skein Melissa - - 2010
The purpose of this study was to examine the effects of fluid ingestion on pacing strategies and performance during intermittent-sprint exercise in the heat. Nine male rugby players performed a habituation session and 2 x 50-min intermittent-sprint protocols at a temperature of 31 degrees C, either with or without fluid. ...
Wong Jorge A - - 2010
The clinical diagnosis of long-QT syndrome (LQTS) remains challenging when ECG abnormalities are borderline or intermittent. Despite issues with access, cost, and heterogeneity of LQTS mutations, genetic testing remains the diagnostic gold standard for diagnosis of LQTS. We sought to develop a provocative testing strategy to unmask the LQTS phenotype ...
Mujović Nebojsa - - 2010
A 33-year-old woman presented with exercise-related palpitations after an apparently successful catheter-ablation of overt midseptal accessory pathway. Post procedure, the electrocardiogram at rest was normal, while the progressive appearance of delta-wave during treadmill stress testing was recorded. In addition, the occurrence of ventricular preexcitation was reproduced by controlled administration of ...
Gates P - - 2010
This study is the result of the anecdotal observation that a number of patients with atrial fibrillation (AF) had noted reversion to sinus rhythm (SR) with exercise.We aimed to evaluate the potential role of exercise stress test (EST) for the reversion of AF. Patients with AF who were scheduled to ...
Guiraud Thibaut - - 2010
Increased QT dispersion (QTd) is a marker of myocardial electrical instability and predicts ventricular arrhythmias and sudden cardiac death. Exercise training (ET) has been shown to reduce both QTd and cardiovascular mortality in various populations. Patients with metabolic syndrome (MS) have been shown to have increased QTd. The effect of ...
Boecker Henning H Fe Klinische Funktionelle Neurobildgebung, radiologische Universitätsklinik, Friedrich-Wilhelms-Universität Bonn, - - 2010
This perspective attempts to outline the emerging role of positron emission tomography (PET) ligand activation studies in human exercise research. By focusing on the endorphinergic system and its acclaimed role for exercise-induced antinociception and mood enhancement, we like to emphasize the unique potential of ligand PET applied to human athletes ...
Mauger Alexis R - - 2010
The aim of this study is to establish whether the introduction of an exercise bout of different distance, would affect the retention of the pacing schema stored from a prior exercise bout. Furthermore, to identify whether the 'internal clock' can be calibrated to absolute distance, and whether this is disrupted ...
Bertini Matteo - - 2009
Current cardiac resynchronization therapy (CRT) devices allow manipulation of the atrioventricular (AV) and interventricular (VV) timings in order to maximize the left ventricular (LV) performance. Multiple echocardiographic and non-echocardiographic methods have been proposed to optimize AV and VV intervals but no consensus has been reached on which methodology should preferably ...
Tse Hung-Fat - - 2009
BACKGROUND: The deleterious effects of right ventricular apical (RVA) pacing may offset the potential benefit of ventricular rate (VR) regularization and rate adaptation during an exercise in patient's atrial fibrillation (AF). METHODS: We studied 30 patients with permanent AF and symptomatic bradycardia who receive pacemaker implantation with RVA (n = ...
Kraaier Karin - - 2009
AIMS: The absence of microvolt T-wave alternans (MTWA) identifies a group of patients who are at low risk for ventricular arrhythmia or sudden cardiac death. However, in exercised assessed MTWA, 20-40% of all test results are indeterminate. We hypothesised that MTWA during pacing would yield less indeterminate results. METHODS AND ...
Sugiyasu Aiko - - 2009
Catecholaminergic polymorphic ventricular tachycardia (VT) is characterized by polymorphic VT during exercise, and the association of atrial fibrillation (AF) has been reported. However, the mechanism of AF in this disease and the relationship between VT and AF has been obscured. We described a 13-year-old girl who referred for catheter ablation ...
Silberbauer John - - 2009
PURPOSE: The study aim was to validate the closed loop stimulation (CLS) vs. accelerometer (ACC) rate-responsive sensors with electrodes placed in the right ventricular high septal (RVHS) or right ventricular apical (RVA) lead positions in patients following 'ablate and pace' therapy for persistent atrial fibrillation. METHODS: 'Ablate and pace' patients ...
Baron B - - 2011
Thepacing strategy may be defined as the process in which the total energy expenditure during exercise is regulated on a moment-to-moment basis in order to ensure that the exercise bout can be completed in a minimum time and without a catastrophic biological failure. Experienced athletes develop a stable template of ...
Mokrani Bilel - - 2009
BACKGROUND: It is unclear whether, in recipients of cardiac resynchronization therapy (CRT) systems, the optimal AV delay should be the same, shorter, or longer during exercise than at rest. OBJECTIVE: This study sought to examine the effects of atrioventricular (AV) delay optimization at rest and during exercise in 50 recipients ...
Tucker R - - 2009
During self-paced exercise, the exercise work rate is regulated by the brain based on the integration of numerous signals from various physiological systems. It has been proposed that the brain regulates the degree of muscle activation and thus exercise intensity specifically to prevent harmful physiological disturbances. It is presently proposed ...
Tucker R - - 2009
The regulation of the pacing strategy remains poorly understood, because much of classic physiology has focused on the factors that ultimately limit, rather than regulate, exercise performance. When exercise is self-paced and work rate is free to vary in response to external and internal physiological cues, then a complex system ...
Passman Rod - - 2009
BACKGROUND: Atrial rate-adaptive pacing may improve cardiopulmonary reserve in patients with left ventricular dysfunction. METHODS: A randomized, blinded, single-crossover design enrolled dual-chamber implantable defibrillator recipients without pacing indications and an ejection fraction < or =40% to undergo cardiopulmonary exercise treadmill stress testing in both atrial rate-adaptive pacing (AAIR) and ventricular ...
Naffe Aster - - 2009
After pacemaker/implantable cardioverter-defibrillator (pacemaker/ICD) implantation, patients are often required to immobilize the affected arm with a sling to minimize the risk of lead displacement. We examined whether performing a resistive range-of-motion exercise protocol after pacemaker/ICD surgery would result in lead displacement and, therefore, whether sling immobilization and activity restrictions are ...
Wittmeier Steffen - - 2008
Inspiratory and expiratory rhythms in mammals are thought to be generated by pacemaker-like neurons in 2 discrete brainstem regions: pre-Bötzinger complex (preBötC) and parafacial respiratory group (pFRG). How these putative pacemakers or pacemaker networks may interact to set the overall respiratory rhythm in synchrony remains unclear. Here, we show that ...
Zhang Youhua - - 2009
BACKGROUND: Strong vagus nerve stimulation (VNS) is routinely used to induce and maintain atrial fibrillation (AF) in acute animal studies. Taken as a surrogate of increased vagal tone, such observations suggest an arrhythmogenic role of VNS in AF. In contrast, VNS has been demonstrated to have profound therapeutic effects in ...
Roux Jean-François - - 2009
BACKGROUND: Targeting of complex fractionated electrograms (CFEs) has been used as an adjunctive strategy to pulmonary vein isolation (PVI) in patients with persistent atrial fibrillation (AF). However, it is unclear whether CFEs should be targeted before or after PVI. OBJECTIVES: The purpose of this study was to examine the effect ...
Liu Hongyan - - 2008
Atrial fibrillation (AF) may cause thrombus formation in the left atrial appendage (LAA). Thrombus formation is associated with LAA endocardial dysfunction. Because asymmetrical dimethylarginine (ADMA) can cause endothelial dysfunction by decreasing nitric oxide (NO) formation, we investigated plasma ADMA and nitrite/nitrate (NO(X)) levels and myocardial dimethylarginine dimethylaminohydrolase-2 (DDAH-2), protein arginine ...
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