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Results 251 - 300 of 1335
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Gemma Lee W - - 2011
β-Blocker therapy reduces syncope and sudden death in long-QT syndrome type 1 (LQT1), but the mechanism of protection is incompletely understood. This study tested the hypothesis that β-blockade reduces QT prolongation and dispersion of repolarization, measured as the T peak-to-end interval (T(pe) ), during exercise and recovery in LQT1 patients. ...
Miyaki T - - 2011
The regulation of energy metabolism by the central nervous system during endurance exercise was examined. We conducted respiratory gas analysis by functionally paralyzing the ventromedial hypothalamus (VMH), the lateral hypothalamic area, and the paraventricular nucleus of the hypothalamus with local anaesthetic (lidocaine) during treadmill running at a velocity that allowed ...
Sperlich Billy - - 2011
The aim of the study was to determine the cardiorespiratory and metabolic characteristics during intense and moderate table tennis (TT) training, as well as during actual match play conditions. Blood lactate concentration (Lac), heart rate (HR, beats per minute [bpm]), oxygen uptake (VO2), and energy expenditure (EE) in 7 male ...
Costa R J S - - 2011
The purpose of the study was to determine the effects of carbohydrate (CHO) intake, with and without protein (PRO), immediately after prolonged strenuous exercise on circulating bacterially stimulated neutrophil degranulation. Twelve male runners completed 3 feeding interventions, 1 week apart, in randomized order after 2 hr of running at 75% ...
Weston Matthew - - 2011
Soccer referees' physical match performances at the start of the second half (46-60 min) were evaluated in relation to both the corresponding phase of the first half (0-15 min) and players' performances during the same match periods. Match analysis data were collected (Prozone, UK) from 12 soccer referees on 152 ...
Russell Mark - - 2011
This study examined the effects of exercise-induced fatigue on soccer skills performed throughout simulated match play. Fifteen academy soccer players completed a soccer match simulation (SMS) including passing, dribbling, and shooting skills. Precision, success rate, and ball speed were determined via video analysis for all skills. Blood samples were obtained ...
Rollo Ian - - 2011
Ingesting carbohydrate-electrolyte solutions during exercise has been reported to benefit self-paced time-trial performance. The mechanism responsible for this ergogenic effect is unclear. For example, during short duration (≤1 hour), intense (>70% maximal oxygen consumption) exercise, euglycaemia is rarely challenged and adequate muscle glycogen remains at the cessation of exercise. The ...
Crecelius Anne R - - 2011
Exercise hyperaemia in hypoxia is augmented relative to the same level of exercise in normoxia. At moderate exercise intensities, the mechanism(s) underlying this augmented response are currently unclear. We tested the hypothesis that endothelium-derived nitric oxide (NO) and vasodilating prostaglandins (PGs) contribute to the augmented muscle blood flow during hypoxic ...
Robinson Matthew M - - 2011
β-Adrenergic receptor (AR) signaling is a regulator of skeletal muscle protein synthesis and mitochondrial biogenesis in mice. We hypothesized that β-AR blockade blunts postexercise skeletal muscle mitochondrial protein synthesis rates in adult humans. Six healthy men (mean ± SD: 26 ± 6 yr old, 39.9 ± 4.9 ml·kg(-1)·min(-1) peak O(2) ...
Tocco Filippo - - 2011
The diving response is the sequence of cardiovascular, respiratory and metabolic adjustments produced by apnoea and further strengthened by cooling of the facial area and/or hypoxia. This study aimed at comparing the cardiovascular response to diving of trained divers with that of a control group. In this order, 14 trained ...
Mojock Chris D - - 2011
Mojock, CD, Kim, J-S, Eccles, DW, and Panton, LB. The effects of static stretching on running economy and endurance performance in female distance runners during treadmill running. J Strength Cond Res 25(X): 000-000, 2011-Stretching can lead to decreased muscle stiffness and has been associated with decreased force and power production. ...
Fauroux B - - 2011
Cystic fibrosis (CF) lung disease is characterized by progressive airflow obstruction, due to mucus plugging and inflammation within the bronchial walls, and destruction of the lung parenchyma secondary to bronchiectasis. These alterations result in an increase of the work of breathing, leading to alveolar hypoventilation predominantly during sleep, exercise and ...
Ichinose Masashi - - 2011
Hypoperfusion of active skeletal muscle elicits a reflex pressor response termed the muscle metaboreflex. Our aim was to determine the muscle metaboreflex threshold and gain in humans by creating an open-loop relationship between active muscle blood flow and hemodynamic responses during a rhythmic handgrip exercise. Eleven healthy subjects performed the ...
Kiviniemi Antti M - - 2011
The present study was designed to address the contribution of α-adrenergic modulation to the genesis of low frequency (LF, 0.04-0-15 Hz) oscillations in R-R interval, (RRi), blood pressure (BP) and muscle sympathetic nerve activity (MSNA) during different sympathetic stimuli. BP and RRi were measured continuously in twelve healthy subjects during ...
Katayama Keisho - - 2011
It was demonstrated that acute hypoxia increased muscle sympathetic nerve activity (MSNA) by using microneurographic method at rest, but its effects on dynamic leg exercise are unclear. The purpose of this study was to clarify changes in MSNA during dynamic leg exercise in hypoxia. To estimate peak oxygen uptake (VO(2peak)), ...
Armstrong Rachel G - - 2011
We evaluated the effect of exercise-induced hyperthermia (EIH) on autonomic nervous system (ANS) function in the early (<80 min) and late (24 and 48 h) stages of recovery. Eight males underwent three repeated 6 min 70° head-up tilts (HUT1, HUT2 and HUT3), each separated by 10-min supine rest in a non-exercise/non-heat stress control ...
Backhouse Susan H - - 2011
Caffeine's metabolic and performance effects have been widely reported. However, caffeine's effects on affective states during prolonged exercise are unknown. Therefore, this was examined in the present study. Following an overnight fast and in a randomised, double-blind, counterbalanced design, twelve endurance trained male cyclists performed 90min of exercise at 70% ...
Stöhr Eric J - - 2011
During incremental exercise, stroke volume (SV) plateaus at 40-50% of maximal exercise capacity. In healthy individuals, left ventricular (LV) twist and untwisting ("LV twist mechanics") contribute to the generation of SV at rest, but whether the plateau in SV during incremental exercise is related to a blunting in LV twist ...
de Marchi Stefano Fausto - - 2011
Background: In-vivo observations of microcirculatory behaviour during autoregulation and adaptation to varying myocardial oxygen demand are scarce in the human coronary system. This study assessed microvascular reactions to controlled metabolic and pressure provocation (bicycle exercise and external counterpulsation ECP). Methods: In 20 healthy subjects, quantitative myocardial contrast echocardiography (MCE) and ...
Cubrilo Dejan - - 2011
Maximal workload in elite athletes induces increased generation of reactive oxygen/nitrogen species (RONS) and oxidative stress, but the dynamics of RONS production are not fully explored. The aim of our study was to examine the effects of long-term engagement in sports with different energy requirements (aerobic, anaerobic, and aerobic/anaerobic) on ...
Esposito F - - 2011
The aim of this study was to assess the effects of acute passive stretching on cycling efficiency during an exercise of heavy intensity. After maximum aerobic power (V̇O(2max) ) assessment, nine active males (24 ± 5 years; stature 1.71 ± 0.09 m; body mass 69 ± 7 kg; mean ± standard deviation) ...
Burt Dean G - - 2011
Burt, DG and Twist, C. The effects of exercise-induced muscle damage on cycling time-trial performance. J Strength Cond Res 25(X): 000-000, 2011-Previous research has advocated that plyometric training improves endurance performance. However, a consequence of such a training is the immediate and prolonged appearance of exercise-induced muscle damage (EIMD). This ...
Caldwell Joanne N - - 2011
This project was aimed at evaluating the impact of combat armor on physiological and cognitive functions during low-intensity exercise in hot-humid conditions (36 degrees C and 60% relative humidity). Nine males participated in three trials (2.5 hours), walking at two speeds and wearing different protective equipment: control (combat uniform and ...
Miranda Eduardo Foschini - - 2011
In patients with COPD, the degree of functional impairment appears to differ between the upper and lower limbs. Significant dyspnea and fatigue have been reported by these patients when performing tasks with unsupported upper limbs and two mechanisms have been proposed to explain this fact: neuromechanical dysfunction of respiratory muscles; ...
Denis Romain - - 2011
The purpose of this study was to investigate whether changes in angular velocity would alter vastus lateralis (VL) and rectus femoris (RF) oxygenation status during maximal isokinetic knee extension exercises. Eleven recreationally active male participants randomly performed ten maximal knee extensions at 30, 60, 120 and 240° s(-1) . Tissue oxygenation ...
Angle T Craig - - 2011
This project evaluated the use of an ingestible temperature sensor to measure body core temperature (Tc) in exercising dogs. Twenty-five healthy, unconditioned Labrador retrievers participated in an outdoor 3.5-km run, completed in 20 min on a level, 400-m grass track. Core temperature was measured continuously with a telemetric monitoring system ...
Lane Andrew M - - 2011
Objectives The aim of this study was to investigate relationships between trait emotional intelligence and emotional state changes over the course of an ultra-endurance foot race covering a route of approximately 175 miles (282km) and held in set stages over six days. Design A repeated measures field design that sought ...
Jung Mary E - - 2011
Self-regulatory efficacy (SRE) should influence persistence towards goals. Mothers attempting to exercise while managing work and young children (N = 49, M(age) = 35.69, M(children) = 1.88) were stratified into high or low concurrent SRE groups, then randomized to read a hypothetical scenario detailing numerous or minimal exercise barrier conditions. ...
Pereira L M LM 1MSc Programme in Physical Education, Universidade Estadual de Londrina-UEM, Londrina, - - 2011
The effectiveness of facial exercises therapy for facial palsy has been debated in systematic reviews but its effects are still not totally explained. To perform a systematic review with meta-analysis to evaluate the effects of facial exercise therapy for facial palsy. A search was performed in the following databases: Cochrane ...
Anokye Nana Kwame - - 2012
There is a paucity of empirical evidence on the extent to which price and perceived benefits affect the level of participation in sports and exercise. Using an illustrative sample of 60 adults at Brunel University, West London, we investigate the determinants of demand for sports and exercise. The data were ...
Rubin Denis - - 2012
This study investigated whether human chemosensory-stress cues affect neural activity related to the evaluation of emotional stimuli. Chemosensory stimuli were obtained from the sweat of 64 male donors during both stress (first-time skydive) and control (exercise) conditions, indistinguishable by odor. We then recorded event-related potentials (ERPs) from an unrelated group ...
Alberton Cristine Lima - - 2011
The purpose of the present study was to correlate the rating of perceived exertion (RPE) with cardiorespiratory and neuromuscular variables during the execution of stationary running in water at different cadences. The sample consisted of 12 apparently healthy women (age: 22.33 ± 0.57 years). During the assessment session, the subjects ...
Bassami Minoo - - 2011
The present study was designed to investigate the effects of four different meals on fat and CHO metabolism during subsequent exercise in elderly males. Eight healthy males (age: 63.3 ± 5.2 years) reported to the physiology laboratory on four separate occasions, each of which was allocated for the performance of ...
Lee Yi-Ju - - 2011
The objective of this study is to identify the relationship between physical exercise and the feelings of well-being of the retired elderly. Face-to-face questionnaire survey was adopted, and quota sampling was chosen to select the respondents. A total of 352 valid questionnaires were collected in selected parks in Taipei. The ...
Perry Emily S - - 2011
Objective: Physical trauma is the third leading cause of facial nerve damage, which can disrupt communication, social interaction and emotional expression. The objective of this report was to investigate the effects of facial muscle exercise as a stand-alone treatment in a young adult with unilateral facial nerve damage 13-years post-onset. ...
Wood S J - - 2011
Exposure to microgravity drives adaptive changes in healthy individuals reconditioned for abnormal gravity states. These changes are maladaptive for return to earth's gravity. The intersubject variability of sensorimotor decrements is striking, although poorly understood. Multisensory integration, which is important for resolving sensory ambiguity on earth, is a critical mechanism for ...
Poderienė Kristina - - 2011
Breathing is both a voluntary and an involuntary action, and the changes in breathing intensity or breathing stops has an influence on vegetative functions of the body during exercise. The aim of this study was to determine the possible changes in cardiovascular parameters when patients shortly stopped to breath at ...
Peltier Sébastien L - - 2011
Carbohydrates (CHOs), branched-chain amino acids (BCAAs) and caffeine are known to improve running performance. However, no information is available on the effects of a combination of these ingredients on performance and neuromuscular function during running. The present study was designed as a randomized double-blind cross-over placebo-controlled trial. Thirteen trained adult ...
Bates Melissa L - - 2011
The question of whether pulmonary edema develops during exercise on land is controversial. Yet, the development of pulmonary edema during swimming and diving is well established. This paper addresses the current controversies that exist in the field of exercise-induced pulmonary edema on land and with water immersion. It also discusses ...
Scrivener Katharine - - 2011
Are inpatients undergoing rehabilitation who appear able to count exercises able to quantify accurately the amount of exercise they undertake? Observational study. Inpatients in an aged care rehabilitation unit and a neurological rehabilitation unit, who appeared able to count their exercises during a 1-2 min observation by their treating physiotherapist. ...
Marino Frank E - - 2011
There is wide consensus that long duration exercise in the heat is impaired compared with cooler conditions. A common observation when examining exercise tolerance in the heat in laboratory studies is the critical limiting core temperature (CLT) and the apparent attenuation in central nervous system (CNS) drive leading to premature ...
Matsumura Kenta - - 2011
Both the act of competing, which can create a kind of mental stress, and participation in motor sports, which induces physical stress from intense g-forces, are known to increase heart rate dramatically. However, little is known about the specific effect of competition on heart rate during motor sports, particularly during ...
Ribeiro Fabiana - - 2011
University professors are subjected to psychological stress that contributes to blood pressure (BP) reactivity and development of hypertension. The purpose of this study was to investigate the effects of exercise on BP in university professors during teaching and sleeping hours. Twelve normotensive professors (42.2 ± 10.8 years, 74.2 ± 11.2 ...
Inglis Timothy J J - - 2011
The influenza A/H1N1/09 pandemic spread quickly during the Southern Hemisphere winter in 2009 and reached epidemic proportions within weeks of the official WHO alert. Vulnerable population groups included indigenous Australians and remote northern population centres visited by international travellers. At the height of the Australian epidemic a large number of ...
Ribeiro Carmen P - - 2011
Pregnancy is a good time to develop healthy lifestyle habits including regular exercise and good nutrition. Programs of physical exercise for pregnant women have been recommended; however, there are few references on this subject in the literature. The objective of this study was to evaluate the knowledge, attitude and practice ...
Castro Renata R T - - 2011
This study aimed to compare respiratory responses, focusing on the time-domain variability of ventilatory components during progressive cardiopulmonary exercise tests performed on cycle or arm ergometers. The cardiopulmonary exercise tests were conducted on twelve healthy volunteers on either a cycle ergometer or an arm ergometer following a ramp protocol. The ...
Jensen Jørgen - - 2011
Glycogen is the storage form of carbohydrates in mammals. In humans the majority of glycogen is stored in skeletal muscles (∼500 g) and the liver (∼100 g). Food is supplied in larger meals, but the blood glucose concentration has to be kept within narrow limits to survive and stay healthy. Therefore, the ...
Kalliokoski Kari K - - 2011
One-legged dynamic knee-extension exercise (DKE) is a widely used model to study the local cardiovascular and metabolic responses to exercise of the quadriceps muscles. In this study, we explored the extent to which different muscles of the quadriceps are activated during exercise using positron emission tomography (PET) determined uptake of ...
Rubiś Paweł P Department of Cardiac and Vascular Disease, John Paul II Hospital, Jagiellonian University, Krakow, Poland. - - 2011
Gradual impairment of exercise tolerance is the commonest sign of heart failure (HF). Little is known as to which cardiac contributors of poor exercise capacity carry an independent prognostic information in HF. We investigated the prognostic role of exercise echocardiography (ex-echo) in HF patients. We studied 85 consecutive, symptomatic HF ...
Tran Yvonne Y Key University Research Centre in Health Technologies, University of Technology, Sydney. - - 2011
This paper presents the results of cardiovascular changes that occur during a novel rehabilitation strategy called activity based therapy (ABT). Blood volume pulse (BVP) signals were measured during functional electrical stimulation (FES)-induced cycling in adults with spinal cord injury (SCI) persons and results were compared to a passive cycling task ...
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