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Results 451 - 500 of 1397
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Jiji Ronny S RS Departments of Medicine and the Cardiovascular Imaging Center, University of Virginia Health System, Charlottesville, VA, - - 2013
The purpose was to determine the reproducibility and utility of rest, exercise, and perfusion reserve (PR) measures by contrast-enhanced (CE) calf perfusion magnetic resonance imaging (MRI) of the calf in normal subjects (NL) and patients with peripheral arterial disease (PAD). Eleven PAD patients with claudication (ankle-brachial index 0.67 ±0.14) and ...
Schultz Martin G - - 2013
BACKGROUND The prognostic relevance of a hypertensive response to exercise (HRE) is ill-defined in individuals undergoing exercise stress testing. The study described here was intended to provide a systematic review and meta-analysis of published literature to determine the value of exercise-related blood pressure (BP) (independent of office BP) for predicting ...
Sanchez-Gonzalez Marcos Angel - - 2013
BACKGROUND Supplementation with L-citrulline (L-cit) has shown attenuating effects on blood pressure (BP) and pulse-wave-reflection responses (augmentation index (AIx)) to local exposure to cold, but the potential cardioprotective effects of L-cit during whole-body cold exposure with concurrent exercise are poorly understood. We hypothesized that L-cit would attenuate the BP and ...
Mittal S R SR Department of Cardiology, St. Francis Hospital, Ajmer, India. - - 2013
To evaluate efficacy of post exercise tissue velocity imaging in diagnosing more than 70% coronary artery stenosis. Twenty patients with angiographically proved significant coronary artery disease and 26 healthy controls were evaluated. Pulsed wave tissue velocity imaging was performed at rest and immediately after treadmill stress test. Medial and lateral ...
Mitchell Jere H - - 2012
Abstract During exercise, the cardiovascular response is rapidly and appropriately matched to the intensity of the physical activity. The autonomic nervous system plays an important role in achieving this closely matched circulatory response by an increase in the sympathetic nerve activity to the heart, blood vessels, and adrenal medulla and ...
Cheng Susan - - 2012
We have long known that exercise is good for us. Hippocrates declared over 25 centuries ago that "if we could give every individual the right amount of nourishment and exercise, not too little and not too much, we would have found the safest way to health." There is now a ...
Di Rienzo Marco - - 2012
AIMS: We developed a textile-based wearable system, named MagIC, for the unobtrusive monitoring of one electrocardiogram (ECG) lead, respiratory frequency and motion. In the present study, we investigated the ability of this system to monitor cardiac rhythm and arrhythmic events in cardiac patients.METHODS AND RESULTS: The study was carried out ...
Park Jeanie J Renal Division, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia 30322, USA. - - 2013
Patients with chronic kidney disease (CKD) have poor exercise capacity, which contributes to cardiovascular risk. We sought to determine whether patients with stage 2 or stage 3 CKD have an augmented blood pressure (BP) response during exercise, and if so, whether overactivation of the sympathetic nervous system (SNS) during exercise ...
Thompson Randall C - - 2012
BACKGROUND: Regadenoson (Reg) is being administered with increasing frequency either at peak exercise (ExPeak-Reg) or during a slow-down/walking recovery state (ExRec-Reg) rather than at rest (Rest-Reg). The aim of this study was to compare the clinical response of ExPeak-Reg, ExRec-Reg, and Rest-Reg. METHODS: We compared 531 patients divided equally between ...
Wheatley Courtney M - - 2013
Blood pressure (BP) is a key measure of cardiovascular function, and accurate measurement is important to ensure proper clinical evaluation, diagnosis, and treatment. We compared intra-arterial (direct) and cuff auscultation (manual) measurement techniques at rest and during 2 levels of submaximal constant-load exercise (9 min at 40% and 75% maximum ...
Heydari Mehrdad - - 2012
The purpose was to examine the effect of a 12-week exercise intervention on the cardiovascular and autonomic response of males to mental and physical challenge. Thirty four young overweight males were randomly assigned to either an exercise or control group. The exercise group completed a high-intensity intermittent exercise (HIIE) program ...
Hackett Daniel A - - 2012
ABSTRACT: During resistance exercise, a brief Valsalva maneuver (VM) is unavoidable when lifting heavy loads (>80% of maximal voluntary contraction) or when lifting lighter loads to failure. It has been proposed that the performance of the VM during resistance exercise increases the stability of the spine due to augmented intra-abdominal ...
Tiscornia G C - - 2012
Endurance training is accompanied by important adaptations in both cardiovascular and autonomic nervous systems. Previous works have shown that the main component of gap junctions in the ventricular myocardium (connexin 43 (Cx43) can be regulated by adrenergic stimulus. On the other hand, training raises vagal and decreases sympathetic tone, while ...
de Oliveira Tiago Peçanha - - 2013
The ability of the human organism to recover its autonomic balance soon after physical exercise cessation has an important impact on the individual's health status. Although the dynamics of heart rate recovery after maximal exercise has been studied, little is known about heart rate variability after this type of exercise. ...
Eguchi Yasumasa - - 2012
Interval training is effective for promoting aerobic capacity and general health. However, it involves repeated high-intensity activity, which could pose cardiovascular risks for the elderly or people who are less fit. We developed a transitory stimulation interval exercise (TSIE) in which the duration of strenuous exertion was reduced to 30 ...
Bonaiuto M - - 2012
The aim of the study was the evaluation of the autonomic cardiac function in professional soccer players by heart rate recovery (HRR) measurement after 1' or 2' of active recovery (HRR1 or HRR2, respectively) from an exercise stress test. Ninety-two adult professional soccer players (aged 25.27 ± 4.06 years). The ...
Hachiya T - - 2012
This study evaluated whether central command plays an important role in activating muscle sympathetic nerve activity (MSNA) during short-term maximal handgrip contractions. The increase in MSNA was examined while influence of minimizing for other factors such as mechanoreflex, metaboreflex and fatigue during repetitive exercise in seven 19- to 26-year-old participants. ...
Lee So Young - - 2012
To evaluate the effect of neuromuscular electrical stimulation (NMES) on cardiopulmonary function in healthy adults. Thirty-six healthy adults without a cardiac problem were enrolled. All patients were randomly assigned to either a control (17 subjects, mean age 29.41) or an electrical stimulation group (19 subjects, mean age 29.26). The electrical ...
Seo Hye-Sun - - 2012
Impaired exercise tolerance with dyspnea is common in hypertensive patients and this may be due to the exaggeration of nonuniform ventricular activation during exercise. So we want to evaluate the effect of left ventricular hypertrophy (LVH) on systolic intraventricular dyssynchrony during exercise. A total of 85 patients with hypertension who ...
Ward John S - - 2012
The purpose of this study was to determine if thoracolumbar chiropractic manipulative therapy (CMT) had an immediate impact on exercise performance by measuring blood lactate concentration, exercise heart rate, and rating of perceived exertion during a treadmill-based graded exercise test (GXT). Ten healthy, asymptomatic male and 10 female college students ...
Lalande Sophie S Division of Cardiovascular Diseases, Department of Medicine, Mayo Clinic, Rochester, MN 55905, USA. - - 2012
The objective of this study was to investigate the effect of changes in expiratory intrathoracic pressure on stroke volume (SV) at rest and during moderate exercise in patients with heart failure versus healthy individuals. SV was obtained by echocardiography during spontaneous breathing and during expiratory loads of 5 and 10 ...
Billinger Sandra A SA Departments of Physical Therapy and Rehabilitation Science, University of Kansas Medical Center, Kansas City, KS, USA. - - 2012
Cardiovascular health is often impaired after stroke. Reduced exercise capacity ((Equation is included in full-text article.)VO(2peak)) and changes in the vascular system in the stroke-affected limb may impact performance of physical activities such as walking. There is little information regarding the role of prescribed moderate- to high-intensity exercise in subacute ...
Burden Adrian M - - 2012
ABSTRACT: Previous studies have compared muscle activity between different types of sit-ups and curl-ups. However, few have examined exercises used by the armed forces or investigated the influence of exercise duration on muscle activation. The aim of this study was to compare abdominal and hip flexor activity between the style ...
Ladage Dennis - - 2012
NOS-activation in erythrocytes (eryNOS) is impaired in patients suffering from type 2 diabetes. We investigated the effect of physical exercise on eryNOS activation and whether 6 week hypoxia interval training may alter this process. Male patients with diabetes mellitus type 2 (NIDDM, n = 12; age, 61.3 ± 8.4 years; BMI, 29.8 ± 3.7 kg/m(2)) ...
Wang Jong-Shyan - - 2012
BACKGROUND: Anemia disturbs hemorheological/hemodynamic properties, whereas aerobic interval training (AIT) achieves a superior aerobic fitness in patients with heart failure (HF). This study investigated whether AIT influences functional capacity by modulating hemorheological/hemodynamic functions in HF patients with/without anemia. METHODS: Sixty HF patients were divided into non-anemic (HF-NA, hemoglobin≧12g/dL in women/≧13g/dL ...
Michaelides Andreas P - - 2013
J Clin Hypertens (Greenwich). 2012;00:00-00. ©2012 Wiley Periodicals, Inc. Delayed blood pressure (BP) and heart rate (HR) decline at recovery post-exercise are independent predictors of incident coronary artery disease (CAD). Delayed BP recovery and exaggerated BP response to exercise are independent predictors of future arterial hypertension (AH). This study sought ...
Queiroz A C C - - 2012
Moderate- to high-intensity strength training is recommended for healthy adults. In young subjects, a single session of strength training decreases blood pressure, while heart rate and cardiac work remain elevated afterwards. However, these effects have not been clearly demonstrated in elderly subjects. To investigate this issue, 16 elderly subjects each ...
Gaffurini P - - 2012
BACKGROUND:Activity promoting video game (APVG) practice significantly affects energy metabolism through energy expenditure (EE) increase and has been recently included in strategies for health promotion. It is not known if the APVG practice provides similar outcomes in subjects with spinal cord injury (SCI). AIM:Aim of the study was to evaluate ...
Kelly James - - 2012
Dietary nitrate (NO(3)(-)) supplementation has been shown to reduce resting blood pressure and alter the physiological response to exercise in young adults. We investigated whether these effects might also be evident in older adults. In a double-blind, randomized, crossover study, twelve healthy, older (60-70 yrs) adults supplemented their diet for ...
De Mey Kristof - - 2012
STUDY DESIGN: Controlled laboratory study. OBJECTIVES: To assess the effect of conscious correction of scapular orientation on the activation of the 3 sections of the trapezius muscle during shoulder exercises in overhead athletes with scapular dyskinesis. BACKGROUND: Previous research has led to the recommendation of 4 exercises for training of ...
Tanaka Midori - - 2013
Aerobic exercise has been reported to be associated with reduced arterial stiffness. However, the intensity, duration, and frequency of aerobic exercise required to improve arterial stiffness have not been established. In addition, most reports base their conclusions on changes in pulse wave velocity, which is an indirect index of arterial ...
Casey Darren P DP Department of Anesthesiology, Mayo Clinic, Rochester, Minnesota 55905, USA. - - 2013
Large increases in systemic oxygen content cause substantial reductions in exercising forearm blood flow (FBF) due to increased vascular resistance. We hypothesized that 1) functional sympatholysis (blunting of sympathetic α-adrenergic vasoconstriction) would be attenuated during hyperoxic exercise and 2) α-adrenergic blockade would limit vasoconstriction during hyperoxia and increase FBF to ...
Leti Thomas - - 2012
BACKGROUND: The use of heart rate variability (HRV) in the management of sport training is a practice which tends to spread, especially in order to prevent the occurrence of fatigue states. OBJECTIVES: To estimate the HRV parameters obtained using a heart rate recording, according to different exercise impacts, and to ...
Abrams Michael S - - 2012
Exercise-induced esotropia is a rare form of strabismus characterized by paroxysms of esotropia and diplopia only during exercise. This report describes a 15-year-old boy who presented with a 1-year history of exercise-induced esotropia. He has been asymptomatic after recession of a single medial rectus muscle. It is hypothesized that the ...
Fisher James P JP School of Sport & Exercise Sciences, College of Life & Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, - - 2012
The arterial baroreflex (ABR) performs an important role in regulating blood pressure (BP) both at rest and during exercise, by carefully orchestrating autonomic neural activity to the heart and blood vessels. Reduced ABR sensitivity (i.e., gain) has been associated with increased cardiovascular risk, cardiac electrical instability and orthostatic intolerance, while ...
Copp Steven W SW Department of Anatomy and Physiology, Kansas State University, Manhattan, KS 66506, - - 2013
Consumption of the dietary flavanol (-)-epicatechin (EPI) is associated with enhanced endothelial function and augmented skeletal muscle capillarity and mitochondrial volume density. The potential for EPI to improve peripheral vascular function and muscle oxygenation during exercise is unknown. We tested the hypothesis that EPI administration in healthy rats would improve ...
Adams J - - 2012
BackgroundThe standard exercise protocol for patients in a traditional cardiac rehabilitation (rehab) programme may not be adequate for preparing manual workers for a safe return to work, as these activities bear little resemblance to the physical movements and force exertion required in most industrial jobs.AimsTo measure the energy expenditure as ...
Aengevaeren Vincent L - - 2013
Cerebral blood flow (CBF) is stably maintained through the combined effects of blood pressure (BP) regulation and cerebral autoregulation. Previous studies suggest that aerobic exercise training improves cardiac baroreflex function and beneficially affects BP regulation, but may negatively affect cerebral autoregulation. The purpose of this study was to reveal the ...
Wearing Scott C - - 2012
INTRODUCTION: The human patellar tendon is highly adaptive to changes in habitual loading but little is known about its acute mechanical response to exercise. This research evaluated the immediate transverse strain response of the patellar tendon to a bout of resistive quadriceps exercise. METHODS: Twelve healthy adult males (mean age ...
Jørgensen Arve - - 2012
Decompression sickness is initiated by gas bubbles formed during decompression, and it has been generally accepted that exercise before decompression causes increased bubble formation. There are indications that exercise-induced muscle injury seems to be involved. Trauma-induced skeletal muscle injury and vigorous exercise that could theoretically injure muscle tissues before decompression ...
Kulshreshtha Poorvi - - 2013
This review imparts an impressionistic tone to our current understanding of autonomic nervous system abnormalities in fibromyalgia. In the wake of symptoms present in patients with fibromyalgia (FM), autonomic dysfunction seems plausible in fibromyalgia. A popular notion is that of a relentless sympathetic hyperactivity and hyporeactivity based on heart rate ...
Gaz Daniel V - - 2012
This review is based on a case report that concerns a young female athlete who experienced some of the negative aspects of exercise. Overtraining, a negative byproduct of excessive exercise, can turn the positive psychosocial and physiologic benefits of regular physical activity into an activity detrimental to one's health. With ...
Durako─člugil Murtaza Emre - - 2012
Exercise electrocardiography (ECG) is one of the most commonly utilized tests in cardiology. Despite the drawbacks, exercise ECG is widely preferred due to low cost, standardization, and strong prognostic information. A prolonged PR interval during recovery has recently been proposed as an indicator of mortality. Herein, we report an interesting ...
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 ...
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, ...
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 ...
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 ...
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, ...
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, ...
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 ...
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