Search Results
Results 301 - 350 of 1506
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Hosseinzadeh Mahdi - - 2013
The purpose of this study was to investigate the effect of repeated bouts of eccentric exercise on the nociceptive withdrawal reflex (NWR) threshold, a measure of sensitivity in the spinal nociceptive system. Sixteen healthy students (age 25.7 ± 0.6 years, BMI 24.8 ± 1 kg m(-2)) participated in this randomized, controlled, crossover study. Two identical bouts ...
Kintz N - - 2013
The α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic-acid-type glutamate receptor (AMPAR) plays a critical role in modulating experience-dependent neuroplasticity, and alterations in AMPAR expression may underlie synaptic dysfunction and disease pathophysiology. Using the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of dopamine (DA) depletion, our previous work showed exercise increases total GluA2 subunit expression and the contribution of GluA2-containing ...
Stanley Jamie - - 2013
The objective of exercise training is to initiate desirable physiological adaptations that ultimately enhance physical work capacity. Optimal training prescription requires an individualized approach, with an appropriate balance of training stimulus and recovery and optimal periodization. Recovery from exercise involves integrated physiological responses. The cardiovascular system plays a fundamental role ...
Peçanha T - - 2013
Most studies regarding the impact of exercise intensity on cardiac autonomic regulation were conducted with athletes and used exercise intensities exceeding those recommended by position stands. We evaluated the influence of exercise intensity in a typical ACSM-aerobic session on 24-h cardiac autonomic modulation in sedentary subjects. Ten healthy sedentary subjects ...
Perry Blake G - - 2013
Introduction/PurposeUpright resistance exercise causes large transient fluctuations in blood pressure during and immediately following the performance. We examined the effect of resistance load and number of repetitions on the middle cerebral artery blood velocity (MCAv) response during and following upright squatting exercise. Healthy males (n=12; mean±SD: 26±5 y) completed 30, ...
Bond Vernon V Jr a Department of Health, Human Performance and Leisure Studies and the Cancer Center Physical Medicine and Nutrition Laboratory, Howard University, Washington, DC 20059, - - 2014
The advent of medical nutrition therapy and nutritional physiology affords the opportunity to link diet to specific cardiovascular mechanisms, suggesting novel treatments for cardiovascular disease. This study tests the hypothesis that beetroot juice increases the plasma nitric oxide (NO) concentration, which is associated with improvements in cardiorespiratory function at rest ...
Wang Chun-Chih - - 2013
This study was designed to examine the modulation of executive functions during acute exercise and to determine whether exercise intensity moderates this relationship. Eighty college-aged adults were recruited and randomly assigned into one of the four following groups: control, 30%, 50%, and 80% heart rate reserve. The Wisconsin Card Sorting ...
Muller Matthew D - - 2013
Reactive oxygen species (ROS), produced acutely during skeletal muscle contraction, are known to stimulate group IV muscle afferents and accentuate the exercise pressor reflex (EPR) in rodents. The effect of ROS on the EPR in humans is unknown. We conducted a series of studies using ischemic fatiguing rhythmic handgrip to ...
Rommel Anna-Sophie - - 2013
The degree of functional impairment and adverse developmental outcomes in individuals with attention-deficit/hyperactivity disorder (ADHD) likely reflect interplay between genes and environment. To establish whether physical exercise might reduce the level of ADHD symptoms or ADHD-related impairments, we conducted a comprehensive review of the effect of exercise in children with ...
Ogasawara Riki - - 2013
A recent study identified ursolic acid (UA) as a potent stimulator of muscle protein anabolism via PI3K/Akt signaling, thereby suggesting that UA can increase Akt-independent mTORC1 activation induced by resistance exercise via Akt signaling. The purpose of the present study was to investigate the effect of UA on resistance exercise-induced ...
Lindgren M - - 2013
Exercise has widely documented cardioprotective effects, but the mechanisms behind these effects are still poorly understood. Here, we test the hypothesis that aerobic training lowers cardiovascular sympathetic responses to and speeds recovery from challenge. We conducted a randomized, controlled trial contrasting aerobic versus strength training on indices of cardiac (pre-ejection ...
Archer Trevor - - 2013
Both clinical and laboratory studies have demonstrated that different types of physical exercise may alleviate Parkinsonism yet evidence for complete restoration of motor function and biomarker integrity are difficult to identify. MPTP (1 × 30 mg/kg, s.c., 4 groups) or saline (vehicle 1 × 5 ml/kg, s.c., 1 group) were administered in a single dose regime ...
Cleary Michelle A - - 2013
Decreasing core body temperature during exercise may improve exercise tolerance, facilitate acclimatization, and prevent heat illness during summer training. We sought to evaluate the effectiveness of intermittent superficial cooling on thermoregulatory, cardiovascular, and perceptual responses during exercise in a hot-humid environment. We used a randomized, counterbalanced, repeated measures investigation with ...
Joyner Michael J - - 2013
Blood flow increases to exercising skeletal muscle and this increase is driven primarily by vasodilation in the contracting muscles. When oxygen delivery to the contracting muscles is altered by changes in arterial oxygen content, the magnitude of the vasodilator response to exercise changes. It is augmented during hypoxia and blunted ...
Page Richard L - - 2013
We sought to characterize the relative frequency, care and survival of sudden cardiac arrest in traditional indoor exercise facilities, alternative indoor exercise sites and other indoor sites. Little is known about the relative frequency of sudden cardiac arrest at traditional indoor exercise facilities versus other indoor locations where people engage ...
Guerra Zaqueline F - - 2013
The aim of the study was to investigate the influence of training load and exercise mode on heart rate variability and heart rate recovery (HRR) in healthy individuals. The subjects were divided into three groups: sedentary (SED), resistance trained (RT) and aerobically trained (RT). Resting and postmaximal exercise RR intervals ...
Driss Tarak - - 2013
Abstract The present investigation verified that strength is improved by a training programme consisting of repetitions of maximal isometric voluntary co-contractions without increasing co-activations during contractions against external resistances. Ten participants performed 12 training sessions (four sets of 6 × 4 second maximal isometric co-contraction of the elbow flexor and extensors, 3 ...
Jebali T T Research Laboratory "Sport Performance Optimisation" CNMSS, Tunis, Tunisia ; UR EM2S, ISSEPS, Sfax University - - 2013
The aim of this study was to investigate the heart rate (HR) responses, the rate of perceived exertion (RPE), and the feeling during physical education schooling while performing traditional games activities compared to intermittent exercise. Nineteen pre-pubertal children randomly performed on different days two types of lessons (intermittent running mode ...
Hu Min - - 2013
This study compared arterial stiffness and wave reflection at rest and following maximal exercise between individuals with and without Down syndrome (DS), and the influence of body mass index (BMI), peak oxygen uptake (VO2peak) on changes in arterial stiffness. Twelve people with DS (26.6±2.6yr) and 15 healthy controls (26.2±0.6yr) completed ...
Hanke Thorsten - - 2013
Since blood flow impairment by aortic valve prosthesis is characteristically dynamic, this dynamic component is best and thoroughly appreciated by exercise Doppler echocardiography. We sought to determine the haemodynamics of a new pericardial aortic bioprosthesis (Trifecta™, St Jude Medical, MN, USA; T-AVB) at rest and during exercise and a 10-min ...
Masutani Satoshi - - 2013
In heart failure (HF), the impaired left ventricular (LV) arterial coupling and diastolic dysfunction present at rest are exacerbated during exercise. We have previously shown that in HF at rest, stimulation of β3-adrenergic receptors by endogenous catecholamine depresses LV contraction and relaxation. β3-adrenergic receptors are activated at higher concentrations of ...
Lovering Andrew T - - 2013
Cardiopulmonary function is reduced in adults born extremely preterm, but it is unknown if this results in reduced pulmonary gas exchange efficiency during exercise and, consequently, leads to reduced aerobic capacity in subjects with and without bronchopulmonary dysplasia (BPD). We hypothesized that an excessively large alveolar to arterial oxygen difference ...
Seebauer Laura - - 2013
Imagery rescripting (ImRS), i.e. changing intrusive mental images in imagery, is increasingly recognized as a helpful therapy technique. In ImRS exercises, patients sometimes suggest taking violent revenge on perpetrators. However, it is unclear whether vengeful phantasies can be particularly helpful in giving back feelings of power and control, or whether ...
Barone Gibbs Bethany B University of Pittsburgh, Department of Health and Physical Activity, PA, USA. - - 2013
Though being physically active has associated with a healthier ankle-brachial index (ABI) in observational studies, ABI usually does not change with exercise training in patients with peripheral artery disease (PAD). Less is known about the effect of exercise training on ABI in patients without PAD but at high risk due ...
Ichinose Masashi - - 2013
During high-intensity dynamic exercise, O2 delivery to active skeletal muscles is enhanced through marked increases in both cardiac output and skeletal muscle blood flow. When the musculature is vigorously engaged in exercise, the human heart lacks the pumping capacity to meet the blood flow demands of both the skeletal muscles ...
Sousa Nuno Mf de - - 2013
Generally, the evaluation of the blood pressure response to resistance exercise has been limited to the evaluation of discontinuous casual blood pressure monitoring, often measured at the end of the exercise. To continuously evaluate the blood pressure response at different intensities of leg press exercise with the same duration and ...
Mole Jason L - - 2013
Exercise-related transient abdominal pain (ETAP) affects 40-60% of the physically active population, is detrimental to performance but of unknown aetiology. Excessive movement of abdominal peritoneum is one proposed mechanism. Transversus abdominis (TrA) function may play a role reducing in the incidence of Exercise-related transient abdominal pain via the tensioning of ...
Fisher Beth E BE Division of Biokinesiology and Physical Therapy, University of Southern California, Los Angeles, California 90033, - - 2013
We have previously demonstrated changes in dopaminergic neurotransmission after intensive exercise in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-lesioned mouse model of Parkinson's disease (PD), including an increase in the dopamine D2 receptor (DA-D2R), using noninvasive PET imaging with the radioligand [18F]fallypride. The purpose of this feasibility and translational study was to examine whether intensive ...
Grant Catharina C - - 2013
The aim of this study was to compare the physical fitness, based on VO2max and exercise induced cardiac autonomic changes, measured by heart rate variability (HRV), of 12 weeks with 20 weeks of training in the South African National Defence Force (SANDF). Recruits (n=154) participated in a medium to high ...
Berchicci Marika - - 2013
Motor planning in older adults likely relies on the overengagement of the prefrontal cortex (PFC) and is associated with slowness of movement and responses. Does a physically active lifestyle counteract the overrecruitment of the PFC during action preparation? This study used high-resolution electroencephalography to measure the effect of physical exercise ...
Casey Darren P - - 2013
In humans, β-adrenergic receptor activation causes a substantial portion of hypoxic vasodilation in skeletal muscle at rest and during forearm exercise. Recent evidence suggests that β-adrenergic receptors are either more sensitive or upregulated in young women vs. men. Therefore, we examined whether sex influences hypoxic vasodilation in 31 young subjects ...
Lancellotti Patrizio - - 2013
The emerging role of exercise and especially exercise echocardiography in aortic stenosis has been recently emphasized. In this clinical setting, stress testing can help identify patients who are falsely asymptomatic, unmask those who will rapidly become symptomatic and appraise the true haemodynamic consequences of aortic stenosis. Both exercise stress test ...
Maekura Ryoji - - 2013
Patients with chronic obstructive pulmonary disease (COPD) have reduced exercise tolerance associated with dyspnea. This exercise intolerance is primarily due to impaired ventilatory mechanics, but it is also associated with a combination of factors, including inefficient gas exchange, lactic acidosis at a low work rate, and exercise-induced hypoxemia. The survival ...
Hayes Don D - - 2013
Although pulmonary arterial hypertension (PAH) is a potential co-morbidity in cystic fibrosis (CF), right heart catheterization (RHC) is not commonly performed in this patient population until referral for lung transplantation. An non-randomized observational pilot study was performed after an exercise protocol with an upright stationary bicycle was added to RHC ...
Dunagan Julie - - 2013
Cardiac rehabilitation exercise prescriptions should be based on exercise stress tests; however, limitations in performing stress tests in this setting typically force reliance on subjective measures like the Duke Activity Status Index (DASI). We developed and evaluated a treadmill-based exercise tolerance test (ETT) to provide objective physiologic measures without requiring ...
Cucato Gabriel Grizzo - - 2013
To assess the acute metabolic and cardiovascular responses to walking exercise at an intensity corresponding to the heart rate of claudication pain onset and to investigate the effects of a 12-week walking training program at this intensity on walking capacity. Twenty-nine patients with intermittent claudication were randomly allocated to the ...
Sunita - - 2013
Exercise response of asymptomatic subclinical hypothyroid patients may aid in early diagnosis of cardiovascular morbidity. To study and compare the heart rate and blood pressure changes during exercise and recovery in subclinical hypothyroid patients and euthyroid controls. For the study, 30 each cases (mean age of 40 ± 7 years) ...
Yoo Won-Gyu WG Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University and Elderly Life Redesign - - 2013
[Purpose] We developed a multi-air-cushion biofeedback device (MABD) to assist the dynamic hug exercise, and investigated the effects of MABD on the shoulder muscles during the dynamic hug exercise. [Subjects] Twelve males aged 22-32 years were recruited. [Methods] We measured the right side serratus anterior, lower trapezius, and upper trapezius muscle ...
Seo Sung-Hwa SH Department of Medical Science, GyeongJu - - 2013
[Purpose] Scapular stabilizer strengthening exercise is crucial for shoulder rehabilitation. The purpose of this study was to compare two types of push-up plus exercises, on a stable and unstable bases of support, using surface electromyography (EMG), to suggest an effective shoulder rehabilitation program. [Subjects and Methods] Ten healthy men volunteered ...
Roca M M University of Medicine and Pharmacy Grigore T. Popa, - - 2013
Autonomic nervous system dysfunction proved in chronic obstructive pulmonary disease (COPD) patients might determine an elevated cardiovascular risk by heart rate alteration. To assess the particularities of heart rate as a possible cardiovascular risk factor in COPD patients. This prospective, case-control study comparatively analyzed the pulse rate continuously recorded with ...
Rodrigues Fernando - - 2013
One of the most important consequences of smoking is the development of cardiovascular diseases. However, little is known about the early consequences of smoking and the acute effects of a single inspiratory muscle exercise session (IME). We evaluated the acute effects of an IME on cardiac parameters of young smokers. ...
Eckberg D L - - 2013
To determine if physiological, rhythmic fluctuations of vagal baroreflex gain persist during exercise, post-exercise ischaemia, and recovery. We studied responses of six supine healthy men and one woman to a stereotyped protocol comprising rest, handgrip exercise at 40 % maximum capacity to exhaustion, post-exercise forearm ischaemia, and recovery. We measured ...
Amann Markus - - 2013
The development of muscle fatigue is O2-delivery sensitive (arterial O2-content [CaO2] x limb blood flow [QL]). Locomotor exercise in acute-hypoxia (AH) is, compared to sea-level (SL), associated with reduced CaO2 and exaggerated inspiratory muscle work (Winsp; which impairs QL), both of which individually exacerbate fatigue by compromising O2-delivery. Since chronic-hypoxia ...
Lambiase Maya J - - 2013
Exercise blood pressure is a robust predictor of cardiovascular disease risk. Endothelial dysfunction occurs early in development of cardiovascular disease and is associated with greater exercise blood pressure in adults. However, it is not yet clear whether endothelial function is associated with exercise blood pressure in youth. The purpose of ...
Roig Marc - - 2013
We reviewed the evidence for the use of cardiovascular exercise to improve memory and explored potential mechanisms. Data from 29 and 21 studies including acute and long-term cardiovascular interventions were retrieved. Meta-analyses revealed that acute exercise had moderate (SMD=0.26; 95% CI=0.03, 0.49 p=0.03; N=22) whereas long-term had small (SMD=0.15; 95% ...
García-Hermoso A - - 2013
The purpose of this meta-analysis was to examine the evidence for the effectiveness of exercise interventions on the resting blood pressure (systolic and diastolic) of obese children. A computerized search was made of seven databases using keywords. Effect sizes (ES) and 95% confidence intervals were calculated, and the heterogeneity of ...
Bolduc Virginie - - 2013
Cognitive performances are tightly associated with the maximal aerobic exercise capacity (VO2max), both of which decline with age. The benefits on mental health of regular exercise, which slows the age-dependent decline in VO2max, have been established for centuries. In addition, the maintenance of an optimal cerebrovascular endothelial function through regular ...
Arazi Hamid H Faculty of Sport Sciences, Department of Exercise Physiology, University of Guilan, Rasht, - - 2013
The purpose of this study was to compare the effects of high, moderate and low intensity plyometric exercise on the post-exercise systolic and diastolic blood pressure and heart rate responses. Ten healthy normotensive men (age, 21.1±0.9 years; height, 175.8±6 cm; and body mass, 69.1±13.6 kg) volunteered to participate in this ...
Hansen Dominique - - 2013
To explore the etiology of exercise intolerance in patients with MS, it is analyzed whether a disturbed cardiac autonomic control could be observed during exercise testing in patients with MS, and is related to exercise tolerance. From 26 MS patients and 15 healthy subjects, exercise-onset (first 20 and 60 seconds) ...
Sugawara Jun - - 2013
The aortic pulse pressure (PP), which consists mainly of the incident wave and the reflected wave, has emerged as an important property of systemic blood vessels underlying the pathophysiology of cardiovascular disease. To determine the role of sympathetic nerve activity on the aortic PP response during dynamic exercise, we evaluated ...
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