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Results 301 - 350 of 1397
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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 ...
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 ...
Sinha Biswajit - - 2013
Surya Namaskar (SN), a popular traditional Indian yogic practice called "Sun Salutations", includes practice of twelve physical postures involving alternate backward bending and forward bending postures. The practice of twelve postures in succession makes one round of its practice. Many people practise it as part of their daily physical fitness ...
Backer Vibeke - - 2013
Exercise-induced bronchoconstriction (EIB) describes the transient narrowing of the airways during, and particularly after exercise and occurs commonly in asthmatic individuals. Limitation of exercise capacity is a frequent complaint in all age groups, and severity of EIB ranges from mild impairment of performance to severe bronchospasm and a large reduction ...
Santana Hugo A P - - 2013
Whether intensity or other characteristics of physical activity can better promote the release of nitric oxide (NO) and reduction of blood pressure in hypertensive older-adults is still unknown. In this study, the post-exercise blood pressure (BP) response and NO release after different intensities of aerobic exercise in elderly women were ...
Montenegro R - - 2013
The study evaluated the effect of transcranial direct current stimulation (tDCS) applied over prefrontal cortex on the oxygen uptake (V˙ O2) at rest and during post-exercise recovery. The V˙ O2 was assessed in eleven healthy subjects before, during tDCS (sham or anodal tDCS, 2 mA, 20 min), and 30-min following ...
Morris David M - - 2013
Exposure to hypoxia results in vasoconstriction of the pulmonary vasculature (HPV) leading to pulmonary hypertension (HPH) and reductions in blood oxygen saturation and exercise performance. Alleviation of HPV and HPH via vasodilators has been shown to improve blood oxygen saturation and exercise performance in hypoxia. Garlic has been shown to ...
Sacre J W - - 2013
We thank Dr Morton for his interest in our paper on the utility of post-exercise heart-rate recovery for cardiac autonomic neuropathy assessment [1] and for elucidating this interesting case study highlighting the related issue of chronotropism. Slower heart-rate recovery in patients with vs. without cardiac autonomic neuropathy in our study ...
Blumberg Friedrich C - - 2013
AIMS: Pulmonary hypertension is a clinical syndrome characterized by a progressive increase in pulmonary vascular resistance leading to right ventricular failure and death. Pulmonary arterial hypertension (PAH) and chronic thromboembolic pulmonary hypertension (CTEPH) are key subgroups of this disorder with comparable clinical and pathological findings. Resting pulmonary haemodynamics correlate only ...
Hodge Daniel - - 2013
The purpose of this study was to determine the time course of the attenuation in sympathetic nervous activity during active heat acclimation (HA) in healthy humans. Eight volunteers completed a maximal graded exercise test followed by 8days of active HA. Heat acclimation consisted of 90min of walking at 40% of ...
Lin Ying-Hsi - - 2013
The time course of the response and recovery after acute activity seen in exercise is not well understood. The goal of this work is to address how proteins of the thin filament (actin and its capping protein, CapZ) are changed by one hour of mechanical stimulation and return to baseline ...
Crupi Domenica - - 2013
ABSTRACT The authors' aim was to determine the cortical mechanisms that underlie the transition from effective performance to its disruption. They thus used transcranial magnetic stimulation (TMS) to study changes of corticospinal excitability after a motor exercise that did not produce overt or perceived neuromuscular fatigue. Forty-four subjects performed either ...
Chandra Navin - - 2013
Sudden cardiac death (SCD) in an athlete is a rare yet highly visible tragedy that generates significant media attention and discussion among medical personnel, sports communities, and laypersons alike. The incidence of SCD is greater in athletes compared with their nonathletic counterparts due to the increased risk associated with strenuous ...
Mota Márcio Rabelo - - 2013
The purpose of this study was to investigate post-exercise hypotension (PEH) during a four-month period of resistance training in hypertensive elderly women. Sixty-four women were divided into two groups: an experimental group (EG), which performed resistance training, and a control group that did not practice any exercise. The experimental group ...
Brunel Patrick - - 2013
Exercise testing is an established noninvasive tool in cardiology used to diagnose and guide treatment in individuals with suspected or confirmed coronary artery disease. Owing to the wealth of information it provides, exercise testing is also being utilized to evaluate prehypertensive stages, characterize hypertension, assess tolerance to exercise and the ...
Gaudio Carlo - - 2013
Congenital abnormalities of the coronary arteries here described are an uncommon form of structural heart disease. Nevertheless, they deserve attention because may cause chest pain and, in some cases, sudden cardiac death even during exercise. Traditional angiography has limitations due to its projectional and invasive nature. The recent development of ...
Roelands Bart - - 2013
Fatigue during prolonged exercise is often described as an acute impairment of exercise performance that leads to an inability to produce or maintain a desired power output. In the past few decades, interest in how athletes experience fatigue during competition has grown enormously. Research has evolved from a dominant focus ...
Pierpont Gordon L - - 2013
Expanded use of exercise heart rate recovery (HRR) has renewed interest in the pathophysiology of heart rate control. This study uses basic physiologic principles to construct a unique model capable of describing the full time course of sympathetic and parasympathetic activity during HRR. The model is tested in a new ...
Rowland Thomas - - 2013
Assessment of myocardial contractile function during exercise is important in gaining an understanding of the normal mechanics of the cardiovascular responses to exercise stress. Such insights are important in identifying determinants of cardiovascular fitness in athletes as well as assessing patients with heart disease. While obtaining such measurements in the ...
Gomes Luis Henrique L S - - 2013
OBJECTIVE: To review possible peculiarities in biological mechanisms related to responses of thermoregulatory and specific sweat glands in exercise performed by children in hot environments. DATA SOURCES: Review of 47 articles published between 1960 and 2011 in the electronic databases MedLine and SciELO Brazil using the following key-words: 'children', 'heat', ...
Schmidl Doreen - - 2013
We determined whether administration of a nitric oxide synthase (NOS) inhibitor alters optic nerve head blood flow (ONHBF) regulation during isometric exercise in healthy subjects. Our study was done in a randomized, placebo-controlled, double-masked, three-way crossover design. A total of 18 healthy subjects was randomized to receive either placebo, phenylephrine, ...
Bothe Nina N Department of Psychiatry and Psychotherapy, Charité-Universitätsmedizin Berlin, Charité Campus Mitte, Berlin, - - 2013
Physical activity activates brain regions and transmitter systems that represent the reward system (i.e., the ventral striatum [VS] and dopamine). To date, the effect of training status and acute exercise on reward processing has not been investigated systematically in humans. To address this issue, we examined highly trained (HT) physically ...
Kolb Erik M - - 2013
Exercise is known to be rewarding and have positive effects on mental and physical health. Excessive exercise, however, can be the result of an underlying behavioral/physiological addiction. Both humans who exercise regularly and rodent models of exercise addiction sometimes display behavioral withdrawal symptoms, including depression and anxiety, when exercise is ...
Farah B Q - - 2013
WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT: Aerobic exercise training is frequently used to reduce risk factors for cardiovascular disease in obese adolescents. However, there is no consensus on how the intensity of exercise affects blood pressure and heart rate variability (HRV). WHAT THIS STUDY ADDS: The current study shows ...
Sanchez-Gonzalez Marcos A - - 2013
In a crossover design we investigated cardiac autonomic responses (heart rate variability, HRV) to isometric handgrip exercise (IHG) in cold (4°C) and temperate (24°C, temp) conditions in 20 men that assumed the supine position for 30min in an environmental chamber. After a 5min rest, subjects performed 3min of IHG followed ...
Okano Alexandre Hideki - - 2013
BACKGROUND: The temporal and insular cortex (TC, IC) have been associated with autonomic nervous system (ANS) control and the awareness of emotional feelings from the body. Evidence shows that the ANS and rating of perceived exertion (RPE) regulate exercise performance. Non-invasive brain stimulation can modulate the cortical area directly beneath ...
Abderrahmane A B - - 2013
The effect of recovery mode (Active [AR] vs. Passive [PR]) on plasma catecholamine (Adrenaline [A] and Noradrenaline [NA]) responses to maximal exercise (Exemax) was studied during interval training (IT). 24 male subjects (21.1±1.1 years) were randomly assigned to a control group (CG, n=6), AR training group (ARG, n=9) or PR ...
Ansley Les - - 2013
Exercise-induced bronchoconstriction (EIB) is highly prevalent in athletes of all abilities and can impact on their health and performance. The majority of athletes with exertional dyspnoea will be initially assessed and managed in primary care. This report provides a practical and pragmatic approach to the assessment and management of a ...
Amaral da Silva Souza Marcus Vinicius - - 2013
Chagas disease (CD) is an infection caused by the protozoan flagellate Trypanosoma cruzi, and transmitted by insects of the genera Triatoma, Rhodnius and Panstrongylus. The heart is affected to varying degrees by inflammatory and destructive lesions in atrial and ventricular myocardial fibers. Several studies have demonstrated the benefits of exercise ...
Shabeeh Husain H King's College London British Heart Foundation Centre, London, United - - 2013
Nitric oxide (NO) release from endothelial NO synthase (eNOS) and/or neuronal NO synthase (nNOS) could be modulated by sympathetic nerve activity and contribute to increased blood flow after exercise. We examined the effects of brachial-arterial infusion of the nNOS selective inhibitor S-methyl-l-thiocitrulline (SMTC) and the nonselective NOS inhibitor N(G)-monomethyl-l-arginine (l-NMMA) ...
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