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Results 401 - 450 of 1510
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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 ...
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 - - 2013
Low aerobic exercise capacity is a risk factor for diabetes and 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 generation ...
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 ...
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 ...
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 ...
Lin Ying-Hsi YH Department of Physiology and Biophysics, University of Illinois at Chicago, College of Medicine, Chicago, Illinois 60612, - - 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 1 h of mechanical stimulation and return to baseline ...
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', ...
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