Search Results
Results 401 - 450 of 1528
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Ramponi Sara - - 2013
Background: Pulmonary rehabilitation (PR) has emerged as a recommended standard of care in symptomatic COPD. Objectives: We now studied whether PR may affect cardiovascular response to exercise in these patients. Methods: Twenty-seven patients (9 females aged 69 ± 8 years) with moderate-to-severe airflow obstruction admitted to a 9-week PR course ...
Raimundo Rodrigo Daminello - - 2013
Stroke has been associated with cardiac autonomic impairment due to damage in central nervous system. Dysfunction in heart rate variability (HRV) may reflect dysfunction of the autonomic nervous system. Aerobic training has been used in the rehabilitation procedure of patients, due to improvement of aerobic function and other beneficial effects ...
Smith Anne-Louise - - 2013
Heart rate variability (HRV) analysis over shorter periods may be useful for monitoring dynamic changes in autonomic nervous system activity where steady-state conditions are not maintained (e.g. during drug administration, or the start or end of exercise). This study undertakes a validation of 70 HRV indices that have previously been ...
Barrera-Ramirez Juliana - - 2013
To better understand the alterations in cardiorespiratory variability during exercise, the present study characterized the patterns of change in heart rate variability (HRV), respiratory rate variability (RRV), and combined cardiorespiratory variability (HRV-RRV) during an intermittent incremental submaximal exercise model. Six males and six females completed a submaximal exercise protocol consisting ...
Camargo Laura H A - - 2013
Dynamic exercise evokes sustained cardiovascular responses, which are characterized by arterial pressure and heart rate increases. Although it is well accepted that there is central nervous system mediation of cardiovascular adjustments during exercise, information on the role of neural pathways and signaling mechanisms is limited. It has been reported that ...
Holland Anne E - - 2013
BACKGROUND: Reduced chronotropic response to maximal exercise has been associated with poor survival in people without respiratory disease. The contribution of chronotropic response to exercise limitation and survival in interstitial lung disease (ILD) is not well defined. This study investigated the relationships between chronotropic response during 6-min walk test, exercise ...
Heinonen Ilkka I Turku PET Centre, University of Turku and Turku University Hospital, Turku, Finland. - - 2013
The role of neuronal regulation of human cardiovascular function remains incompletely elucidated, especially during exercise. Here we, by positron emission tomography, monitored tissue-specific blood flow (BF) changes in nine healthy young men during femoral arterial infusions of norepinephrine (NE) and phentolamine. At rest, the α-adrenoceptor agonist NE reduced BF by ...
Molina Guilherme E GE Cardiovascular Laboratory, Clinical Medicine Area, Faculty of Medicine, University of Brasilia, 70910-900 Brasilia, DF, Brazil. - - 2013
To test whether elite mountain bikers display a cardiac autonomic modulation pattern that is distinctive from that of active non-athletes. The relationship between autonomic adaptation and bradycardia during physical exercise, including high-performance sports such as the mountain biking, remains to be elucidated. Twelve elite mountain bikers and 11 matched non-athletes ...
Flynn Jamie R JR School of Biomedical Sciences and Pharmacy, University of Newcastle, New South Wales, - - 2013
Following spinal cord injury (SCI), anatomical changes such as axonal sprouting occur within weeks in the vicinity of the injury. Exercise training enhances axon sprouting; however, the exact mechanisms that mediate exercised-induced plasticity are unknown. We studied the effects of exercise training after SCI on the intrinsic and synaptic properties ...
Le Meur Yann - - 2013
Purpose: We analyzed heart rate variability (HRV) to detect alterations in autonomic function that may be associated with functional overreaching (F-OR) in endurance athletes.Methods: Twenty one trained male triathletes were randomly assigned to either intensified training (n=13) or normal training (n=8) groups during 5 weeks. HRV measures were taken daily ...
De Santi Giovani Luiz - - 2013
Chronic aortic regurgitation (AR) is a valvulopathy of slow and insidious evolution, and patients may remain asymptomatic for a long period of time. Exercise-induced systolic dysfunction occurs during the natural history of chronic AR and is related to changes in both preload and afterload. We describe the case of a ...
Zorzi Alessandro - - 2013
Negative T waves (NTWs) in right precordial leads (V1 to V3) may be observed on the electrocardiogram (ECG) of healthy subjects but can also represent the hallmark of an underlying arrhythmogenic right ventricular cardiomyopathy (ARVC). It has been a consistent observation that NTWs usually become upright with exercise in healthy ...
Grant Catharina C - - 2013
INTRODUCTION: The quantification of heart rate variability (HRV) is a tool to assess the interaction between exercise and autonomic control, as well as the pathophysiology of diseases affecting autonomic function. Little is known about the influence of genetically influenced physiology on exercise-induced changes in autonomic cardiac regulation. It was theorised ...
Tesch Per A - - 2013
Astronauts are required to perform both resistance and aerobic exercise while in orbit. This study assessed the aerobic energy yield and related physiological measurements using a nongravity dependent flywheel device designed for both resistance and aerobic exercise (RAD) in space. Eight physically active men and women performed all-out rowing on ...
Andrade Lima Aluísio H R - - 2013
To analyze the effect of a single bout of resistance exercise on cardiac autonomic modulation in patients with peripheral artery disease. Fifteen patients with peripheral artery disease (age: 58.3±4.0 years) underwent the following sessions in a random order: resistance exercise (three sets of 10 repetitions of the six resistance exercises ...
Pourmoghaddas Ali - - 2013
Diabetes mellitus (DM) has a lot of complications such as macrovessel and microvessel disease. Another complication of DM is cardiac autonomic neuropathy (CAN), which have effect on automatic nervous system of heart. Failure in heart rate slowing after exercise is a presentation of this abnormality. We selected diabetic patients and ...
Turankar A V - - 2013
Background & objectives: Regular practice of slow breathing has been shown to improve cardiovascular and respiratory functions and to decrease the effects of stress. This pilot study was planned to evaluate the short term effects of pranayama on cardiovascular functions, pulmonary functions and galvanic skin resistance (GSR) which mirrors sympathetic ...
Lee Myoung-Hyo MH Department of Physical Therapy, Graduate school of Physical Therapy, Daegu - - 2013
[Purpose] This study examined the effects of deep flexor muscle-strengthening exercise on the neck-shoulder posture, and the strength and endurance of the deep flexor muscles of high-school students. [Subjects] The subjects were 30 seventeen-year-old female high-school students who complained about bad posture and chronic neck-shoulder pain. They were randomly divided ...
Sinha Anant Narayan AN Associate Professor, Department of Physiology, VCSG Govt Medical Sciences and Research Institute , Srinagar, Uttarakhand, India - - 2013
Pranayama, the art of breath control, is considered to be the heart of yogic exercises. The present study was performed with the aim of evaluating the effect of Pranayama/Alternate Nostril Breathing (A.N.B.) on the parasympathetic nervous system in healthy young adult males. A comparative account of the expiratioin: inspiration ratio ...
Alex Christian - - 2013
ObjectiveExercise has widely documented cardioprotective effects, but the mechanisms underlying these effects are not entirely known. Previously, we demonstrated that aerobic but not strength training lowered resting heart rate and increased cardiac vagal regulation, changes that were reversed by sedentary deconditioning. Here, we focus on the sympathetic nervous system and ...
Watts Christopher R - - 2013
OBJECTIVE: To investigate the effects of a resistance-based chin-to-chest exercise on measures of hyolaryngeal muscle activation compared to a head-lift exercise. DESIGN: Within-subject repeated measures design. SETTING: Academic research laboratory. PARTICIPANTS: Normal young females (N=20) without history of dysphagia, cervical spine conditions, neurological disease, or head/neck cancer (mean age = ...
Medford Heidi M HM Graduate Program in Nutrition and Exercise Physiology, College of Pharmacy, Washington State University, Spokane, WA 99210, - - 2013
Cardiac hypertrophy induced by pathological stimuli is regulated by a complex formed by the repressor element 1-silencing transcription factor (REST) and its corepressor mSin3A. We previously reported that hypertrophic signaling is blunted by O-linked attachment of β-N-acetylglucosamine (O-GlcNAc) to proteins. Regular exercise induces a physiological hypertrophic phenotype in the heart ...
Zouhal Hassane - - 2013
Excess body fat in obese individuals can affect the catecholamine response to various stimuli. Indeed, several studies report lower plasma catecholamine concentrations in obese subjects compared with nonobese subjects in response to submaximal or maximal exercise. This low catecholamine response reflects decreased sympathetic nervous system (SNS) activity. Although the relationship ...
Mortensen Brynjulf - - 2013
Subjects with a low birth weight (LBW) display increased risk of developing type 2 diabetes (T2D). We hypothesized that this is associated with defects in muscle adaptations following acute and regular physical activity, evident by impairments in the exercise-induced activation of AMPK signaling. We investigated 21 LBW and 21 normal ...
Lessard Sarah J SJ Joslin Diabetes Center, Boston, Massachusetts, - - 2013
Low aerobic exercise capacity is a risk factor for diabetes and a strong predictor of mortality, yet some individuals are "exercise-resistant" and unable to improve exercise capacity through exercise training. To test the hypothesis that resistance to aerobic exercise training underlies metabolic disease risk, we used selective breeding for 15 ...
Queiroz A C C - - 2013
Post-resistance exercise hypotension has been extensively described in men and women. However, gender influence on this response has not yet been clear. Gender might change post-exercise hemodynamics, since men and women respond differently during exercise. Thus, the purpose was to compare post-resistance exercise hypotension and its hemodynamic determinants in men ...
Dos Santos M R - - 2013
Previous study showed that muscle sympathetic nerve activity (MSNA) was augmented in anabolic steroids users (AASU). In the present study, we tested the hypothesis that the heart rate (HR) responses after maximal exercise testing would be reduced in AASU. 10 male AASU and 10 AAS nonusers (AASNU) were studied. Cardiopulmonary ...
Simões R P - - 2013
This purpose of this study was to: 1) determine the intensity corresponding to anaerobic threshold (AT) during a discontinuous resistance exercise protocol in healthy young and elderly subjects by analyzing heart rate variability (HRV) and blood lactate (BL) and 2) investigate the effect of aging on these variables. A total ...
Souza E O de - - 2013
The activation of competing intracellular pathways has been proposed to explain the reduced training adaptations after concurrent strength and endurance exercises (CE). The present study investigated the acute effects of CE, strength exercises (SE), and endurance exercises (EE) on phosphorylated/total ratios of selected AMPK and Akt/mTOR/p70S6K1 pathway proteins in rats. ...
Afroundeh R - - 2013
We investigated ventilation (V(.)E) control factors during recovery from light impulse-like exercise (100 watts) with a duration of 20 sec. Blood ions and gases were measured at rest and during recovery. V(.)E, end tidal CO(2) pressure (PETCO(2)) and respiratory exchange ratio (RER) were measured continuously during rest, exercise and recovery ...
Nasim Sumera - - 2013
BACKGROUND: Dyspnea is the frequent cause of exercise intolerance and physical inactivity among patients referred for exercise tolerance test. Diastolic dysfunction has shown significant correlation with exercise capacity and exercise induced dyspnea. To find out the frequency of diastolic dysfunction (DD) and the relationships between impaired exercise capacity and exercise ...
Kota Srinivas - - 2013
This study recorded brain event-related potentials (ERPs) during an attention task under two conditions: (a) immediately after strenuous exercise and (b) immediately after an extended rest period. The goal was to examine the effect of different physiological states on the electrophysiological data. As expected, a larger P3b ERP component was ...
Oussaidene Kahina - - 2013
This study aimed to investigate the involvement of cerebral oxygenation in limitation of maximal exercise. We hypothesized that O2 supplementation improves physical performance in relation to its effect on cerebral oxygenation during exercise. Eight untrained men (age 27 ± 6 years; [Formula: see text]O2max 45 ± 8 ml min(-1) kg(-1)) performed two randomized exhaustive ramp exercises on a ...
Chomiuk Tomasz - - 2013
The influence of physical exercise on the parameters of the cardiovascular system of elderly persons has not been sufficiently investigated yet. The aim of the study was to assess the influence of regular 6-week physical exercise using the Nordic walking (NW) method in a group of elderly persons on their ...
Kochanska-Dziurowicz A A AA Department of Radioisotope Diagnostics and Radiopharmaceuticals, Medical University of Silesia, - - 2013
The aim of this study was to assess the plasma adrenaline and noradrenaline concentrations as well as whole blood β2-adrenoceptor gene (ADRB2) expression in young ice hockey players before and immediately after exercise in relation to performed work. Nineteen Youth National Team ice hockey players were subjected to the maximal ...
Henríquez Olguín C OC Laboratorio de Fisiología, Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas. Universidad Andrés Bello, - - 2013
The objective of this study was to establish differences in vagal reactivation, through heart rate recovery and heart rate variability post exercise, in Brazilian jiu-jitsu wrestlers (BJJW). A total of 18 male athletes were evaluated, ten highly trained (HT) and eight moderately trained (MT), who performed a maximum incremental test. ...
Juel Carsten - - 2013
The present study investigated whether the maximal in vitro Na,K-ATPase activity in human skeletal muscle is changed with exercise and whether it was altered by acute hypoxia. Needle biopsies from 14 subjects were obtained from vastus lateralis before and after 4 min of intense muscle activity. In addition, six subjects ...
Tan Can Ozan - - 2013
Resting vascular sympathetic outflow is significantly increased during and beyond exposure to acute hypoxia without a parallel increase in either resistance or pressure. This uncoupling may indicate a reduction in the ability of sympathetic outflow to effect vascular responses (sympathetic transduction). However, the effect of hypoxia on sympathetic transduction has ...
Coombes Jeff S - - 2013
An exercise program designed to improve fitness is essential for most adults. Exercise decreases the risk of cardiovascular disease, type 2 diabetes, some cancers, depression, and anxiety. Most fail to achieve recommended exercise levels. Only 1.3% of Australian general practice (GP) consultations provide exercise counseling and advice. Australia provides Medicare ...
Burt Dean Gareth - - 2013
Abstract Exercise-induced muscle damage (EIMD), described as the acute weakness of the musculature after unaccustomed eccentric exercise, increases oxidative metabolism at rest and during endurance exercise. However, it is not known whether oxygen uptake during recovery from endurance exercise is increased when experiencing symptoms of EIMD. Therefore, the purpose of ...
Paulson Thomas Aw - - 2013
OBJECTIVE: To investigate the utility of the differentiated ratings of perceived exertion (RPE) for the self-regulation of sub-maximal wheelchair propulsion in novice users. DESIGN: Each participant completed a sub-maximal incremental test and a graded test to exhaustion to determine peak oxygen uptake (VO2peak) on a wheelchair ergometer. On a separate ...
Huang Guoyuan - - 2013
The results of existing controlled clinical trials were synthesized to determine effects of aerobic exercise training on resting systolic (SBP) and diastolic blood pressure (DBP) among previously sedentary older adults, to quantify the magnitude of observed changes, and to examine the influence of the associated interventional variables on these changes. ...
Jacotte-Simancas Alejandra - - 2013
A number of experiments have shown that physical exercise improves acquisition and retention for a variety of learning tasks in rodents. Most of these works have been conducted with tasks associated with a considerable level of stress, physical effort and/or food deprivation that might interact with exercise, thus hindering the ...
Ando Soichi - - 2013
Peripheral visual perception may be relevant to performance in sports. Peripheral visual perception seems to be impaired during strenuous exercise. The hypothesis proposed is that a decrease in cerebral oxygenation is associated with impairment in peripheral visual perception during strenuous exercise. Recent behavioral and physiological data are presented to support ...
Abate M - - 2013
Aim: Warm up prior to exercise induces an increased production of metabolic heat, which triggers the thermoregulatory system to initiate heat loss mechanisms. Variations in cutaneous tissue temperature have been already reported in trained subjects, by means of high resolution thermal imaging. Purpose of this paper was to quantitatively evaluate, ...
Hoigné Philipp - - 2013
Patients with borderline health should consult a physican before travelling to altitude. The physician will need to know the duration of the trip, ascent profile and how much exercise the patient plans to undertake. The presence of comorbid diseases which reduce oxygenation and ventilation should also be taken into account. ...
Burggraaf J L I - - 2013
Exercise training is beneficial in health and disease. Part of the training effect materialises in the brainstem due to the exercise-associated somatosensory nerve traffic. Because active music making also involves somatosensory nerve traffic, we hypothesised that this will have training effects resembling those of physical exercise. We compared two groups ...
Shin Won W Department of Sport Science, College of Natural Science, Kyungnam University, Changwon, - - 2013
Meridian acupressure has been used as the one way recovering body conditions. The purpose of this study was to investigate whether meridian acupressure is effective on removing cortisol, norepinephrine, epinephrine, and lactic acid in blood following exercise. The subjects were 12 healthy male college students and data were processed using ...
Schneider Kathryn J KJ Faculty of Kinesiology, Sport Injury Prevention Research Centre, University of Calgary, Alberta, Canada. - - 2013
To evaluate the evidence for rest, treatment, and rehabilitation following sport-related concussion (SRC). PubMed, CINAHL, PsychInfo, Cochrane Controlled Trials Registers, Health STAR, Sport Discus, EMBASE, Web of Science, and ProQuest. Articles were included if they met the following criteria: original research, reported SRC as a source of injury, and evaluated ...
Savitha D - - 2013
The purpose of the study was to investigate the effect of vocal and instrumental music on various physiological parameters during submaximal exercise. Each subject underwent three sessions of exercise protocol without music, with vocal music, and instrumental versions of same piece of music. The protocol consisted of 10 min treadmill ...
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