Search Results
Results 351 - 400 of 1396
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Yamada Tomohide - - 2011
Slow heart rate recovery (HRR) predicts all-cause mortality. This study investigated the relationship between silent myocardial ischemia (SMI) and HRR in type 2 diabetes. The study enrolled 87 consecutive patients with type 2 diabetes and no chest symptoms. They underwent treadmill exercise testing and single-photon emission computed tomography imaging with ...
Tanskanen Minna M - - 2011
We hypothesized that increased oxidative stress and disrupted redox balance may be predisposing factors and markers for overreaching (OR). PURPOSE:: To examine whether oxidative stress markers and antioxidant status and physical fitness are related to overreaching during an 8-week military basic training (BT) period. METHODS:: Oxidative stress and antioxidant status ...
Johnson Nils P - - 2011
We sought to determine the differential prognosis of patients with a normal single-photon emission computed tomographic (SPECT) perfusion study by type of stress modality. Even with a normal SPECT perfusion study, patients selected for adenosine stress have a worse survival than those selected for exercise stress. In patients who are ...
Rowland Thomas - - 2011
A recent report indicated that variations in myocardial functional (systolic and diastolic) responses to exercise do not contribute to inter-individual differences in aerobic fitness (peak VO(2)) among young males. This study was designed to investigate the same question among adolescent females. Thirteen highly fit adolescent football (soccer) players (peak VO(2) ...
Hamrin K - - 2011
Context: The mechanisms behind the positive effects of physical activity on glucose metabolism in skeletal muscle and the time course of the effects need to be more elucidated. Objective: The aim was to examine the prolonged effects of an acute bout of one-legged exercise on local skeletal muscle glucose utilization ...
da Luz Gabrielle - - 2011
Obesity-induced endoplasmatic reticulum (ER) stress has been demonstrated to underlie the induction of obesity-induced JNK and NF-κB activation inflammatory responses, and generation of peripheral insulin resistance. On the other hand, exercise has been used as a crucial tool in obese and diabetic patients, and may reduce inflammatory pathway stimulation. However, ...
Usui Tatsuya - - 2011
The aim of the present study was to examine whether amount of oral antimicrobial components, human β-defensin-2 (HBD-2), cathelicidin (LL-37), and immunoglobulin A (IgA), might be affected by prolonged strenuous exercise. Ten young male volunteers either exercised on recumbent ergometer at 75% [Formula: see text] for 60 min (exercise session) or ...
Chen Tsung-I - - 2011
We investigated whether exercise provides beneficial effects to attenuate intermittent hypoxia (IH)-induced myocardial apoptosis. Male Sprague-Dawley rats were randomly assigned to four groups: control (CON), IH, exercise (EXE) or IH interspersed with EXE (IHEXE). IH rats were exposed to repetitive hypoxia-reoxygenation cycles (30 s of 5% O(2); 45 s of 21% O(2), ...
Ando Soichi - - 2011
This study tested whether cerebral oxygenation affects cognitive function during exercise. We measured reaction times (RT) of 12 participants while they performed a modified version of the Eriksen flanker task, at rest and while cycling. In the exercise condition, participants performed the cognitive task at rest and while cycling at ...
Smith J - - 2011
BACKGROUND AND AIMS: Atenolol is a beta-1 adrenergic antagonist commonly prescribed for the treatment of systemic hypertension or coronary artery disease yet its use in individuals with type 2 diabetes mellitus (T2DM) is controversial due to potentially negative side effects on insulin resistance. Non-esterified fatty acid (NEFA) metabolism is altered ...
Ogoh Shigehiko - - 2011
Limited information is available regarding cerebral vascular responses to dynamic exercise in older adults. We examined the influence of age on exercise-induced changes in the critical closing pressure (CCP) of the cerebral vasculature. Twelve young and older subjects performed two bouts of steady-state cycling at low and moderate intensities (30% ...
Thomasson R - - 2011
The aim of the study was to evaluate the effects of short-term glucocorticoid treatment on plasma amino acids, free fatty acids, blood glucose, and several hormones in healthy volunteers performing long-lasting exercise. 9 young female subjects exercised 2 h at 50-55% VO (2) max twice, once after placebo (Pla) ingestion ...
Kakigi Ryo - - 2011
This study investigated the effect of heat stress (HS) on mammalian target of rapamycin (mTOR) signaling involved in translation initiation after resistance exercise in human skeletal muscle. Eight young male subjects performed four sets of six maximal repetitions of knee extension exercises, with or without HS, in a randomized crossover ...
Goto Kazushige - - 2011
This study compared the fat metabolism between 'a single bout of 30-min exercise' and 'three bouts of 10-min exercise' of the same intensity (60% maximal oxygen uptake) and total exercise duration (30 min). Nine healthy men participated in three trials: (1) a single 30-min bout of exercise (Single), (2) three 10-min ...
Hull James H - - 2011
BACKGROUND: Adult patients with cystic fibrosis (CF) have resting abnormal large artery haemodynamics. Here, we obtain further insight in patients with CF by evaluating haemodynamic response to physiological stress. METHODS: Thirty-six stable CF patients mean (SD) age 28.9 (9.0)years and 25 controls matched for age, gender and body mass index ...
McCullough Danielle J - - 2011
With advancing age, there is a reduction in exercise tolerance, resulting, in part, from a perturbed ability to match O(2) delivery to uptake within skeletal muscle. In the spinotrapezius muscle (which is not recruited during incline treadmill running) of aged rats, we tested the hypotheses that exercise training will 1) ...
Cohen Mitchell I - - 2011
Background: Inappropriate internal cardioverter defibrillator (ICD) therapies may result from T-wave oversensing (TWOS) during exertion in children. The aim of this study was to evaluate the utility of an exercise treadmill test to predict inappropriate ICD therapies secondary to TWOS. Methods: Eligible pediatric ICD recipients underwent exercise-stress testing with concomitant ...
Chapados Natalie Ann - - 2011
Hepatic endoplasmic reticulum (ER) stress has recently been associated with several health complications such as obesity, type 2 diabetes, and hepatic steatosis. Exercise training has been recognized for many years to have important beneficial effects in these metabolic complications, however much remains unknown regarding the effects of exercise training on ...
Schaal Karine - - 2011
We examined the catecholamine response to exercise in five eumenorrheic (EU) and five amenorrheic (AM) athletes, matched by age (mean ± SEM: EU = 29.8 ± 2.5 yr and AM = 31.0 ± 4.3 yr) and running volume (EU = 56.4 ± 8.1 km·wk(-1) and AM = 61.5 ± 6.4 ...
Korantzopoulos Panagiotis - - 2011
Exercise is a classic trigger of ventricular arrhythmias in the setting of coronary artery disease (CAD). The aim of this study was to examine the changes of novel indexes of repolarization in patients with stable CAD who underwent exercise stress testing. Sixty-seven consecutive patients (mean age 62 ± 9 years, ...
McClean Conor M - - 2011
There is a paucity of research examining the influence of acute exercise on pulse wave velocity (PWV) and oxidative stress. The purpose of this study was to examine the effects of acute moderate aerobic exercise on PWV and oxidative stress in healthy males. Eight apparently healthy males (age 23.6 ± ...
Werkman Maarten S - - 2011
: To study whether peak oxygen uptake ((Equation is included in full-text article.)O2 peak), attained in traditional cardiopulmonary exercise testing (CPET) in adolescents with cystic fibrosis (CF), could be verified by a supramaximal exercise test. : Sixteen adolescents with CF (forced expiratory volume in 1 second as % of predicted [range, ...
Ruby Matthew B - - 2011
Objective: To examine whether-and why-people underestimate how much they enjoy exercise. Design: Across four studies, 279 adults predicted how much they would enjoy exercising, or reported their actual feelings after exercising. Main Outcome Measures: Main outcome measures were predicted and actual enjoyment ratings of exercise routines, as well as intention ...
Miladi Imed - - 2011
This study aimed to determine the effect of 3 different recovery modes (passive [PR], active [AR], and dynamic stretching [SR]) on exercise time to exhaustion (Tlim) and cardiorespiratory and blood lactate responses during supramaximal exercise. Exercise sessions consisted of 2 series of 4 repeated, intermittent supramaximal cycling exercise interspersed in ...
Arena Ross - - 2011
Cardiopulmonary exercise testing (CPX) is a specialized exercise assessment that provides valuable information in a number of patient populations. Physicians are often familiar with standard exercise testing procedures (i.e., the cardiac stress test) and, therefore, appropriately refer patients with signs/symptoms suggestive of myocardial ischemia. However, the procedures surrounding referral for ...
Walsh Neil P - - 2011
The physical training undertaken by athletes is one of a set of lifestyle or behavioural factors that can influence immune function, health and ultimately exercise performance. Others factors including potential exposure to pathogens, health status, lifestyle behaviours, sleep and recovery, nutrition and psychosocial issues, need to be considered alongside the ...
Barakzai S Z - - 2011
Reasons for performing study: To correlate resting and exercising endoscopic grades of laryngeal function in horses undergoing high-speed treadmill endoscopy (HSTE) using the Havemeyer grading system. To correlate dorsal displacement of the soft palate (DDSP) seen at rest with palatal function during exercise. Methods: Records of horses that underwent HSTE ...
Rahnama Nader - - 2011
The aim of this study was to examine the influence of high-intensity intermittent exercise and carbohydrate supplementation on cardiac troponin I (cTnI) and creatine kinase-MB (CK-MB) in soccer players. Twelve elite soccer players were selected and divided equally into three groups of carbohydrate (CHO), placebo (P) and control (C). Blood ...
Tanindi Asli - - 2011
An impaired heart rate response during exercise (chronotropic incompetence) and an impaired heart rate recovery (HRR) after exercise are predictors of cardiovascular risk and mortality. Cystatin C is a novel marker for cardiovascular disease. We aimed to investigate exercise electrocardiographic responses in patients with metabolic syndrome who were without overt ...
Berzosa C - - 2011
Antioxidant defences are essential for cellular redox regulation. Since free-radical production may be enhanced by physical activity, herein, we evaluated the effect of acute exercise on total antioxidant status (TAS) and the plasma activities of catalase, glutathione reductase, glutathione peroxidase, and superoxide dismutase and its possible relation to oxidative stress ...
Schweitzer G G - - 2011
Bradykinin can enhance skeletal muscle glucose uptake (GU), and exercise increases both bradykinin production and muscle insulin sensitivity, but bradykinin's relationship with post-exercise insulin action is uncertain. Our primary aim was to determine if the B2 receptor of bradykinin (B2R) is essential for the post-exercise increase in GU by insulin-stimulated ...
Killackey Eoin - - 2011
Young people with first episode psychosis are at an increased risk for a range of poor health outcomes. In contrast to the growing body of evidence that suggests that exercise therapy may benefit the physical and mental health of people diagnosed with schizophrenia, there are no studies to date that ...
Cucato Gabriel Grizzo - - 2011
To verify the acute effects of resistance exercise on post-exercise blood pressure in patients with intermittent claudication. Eight patients randomly underwent two experimental sessions: a session of resistance exercise (R: 6 exercises, 3 sets of 12, 10 and 8 reps with a perceived exertion of 11 to 13 on the ...
Galvão Tatiana F G - - 2011
To investigate the effect of opioid receptor blockade on the myocardial protection conferred by chronic exercise and to compare exercise training with different strategies of myocardial protection (opioid infusion and brief periods of ischemia-reperfusion) preceding irreversible left anterior descending coronary ligation. The acute cardioprotective effects of exercise training are at ...
Kukielka Monica - - 2011
Aim: Increased sodium/calcium exchanger activity (NCX1, an important regulator of cardiomyocyte cystolic calcium) may provoke arrhythmias. Exercise training can decrease NCX1 expression in animals with heart failure improving cytosolic calcium regulation, and could thereby reduce the risk for ventricular fibrillation (VF). Methods: To test this hypothesis, a 2-min coronary occlusion ...
Wray D W - - 2010
Aging, vascular function, and exercise are thought to have a common link in oxidative stress. Both antioxidant supplementation and exercise training have been identified as interventions which may reduce oxidative stress, but their interaction in older humans is not well understood.
Jellis Christine L - - 2010
Patients with type 2 diabetes mellitus (T2DM) might have subclinical myocardial dysfunction identified at rest or unmasked during exercise. We examined the correlates of the myocardial exercise response in patients with T2DM. Myocardial dysfunction was sought during at rest and exercise echocardiography in 167 healthy patients with T2DM (97 men, ...
Adami A - - 2010
[Formula: see text], [Formula: see text] and muscular deoxyhaemoglobin (HHb) kinetics were determined in 14 healthy male subjects at the onset of constant-load cycling exercise performed at 80% of the ventilatory threshold (80%(VT)) and at 120% of [Formula: see text] (120%(Wmax)). An innovative approach was applied to calculate the time ...
Michaelides Andreas P - - 2010
BACKGROUND: We investigated whether ischemia-induced wall motion abnormalities during exercise test modify electrical vector variation. METHODS: We performed treadmill exercise test and thallium 201 scintigraphy in 150 normotensives. Beat-to-beat change of direction of S wave in V(1) (reference lead) was compared with that of R wave in V(5) and aVF, ...
Qi Zhengtang - - 2010
Oxidative stress can impair mitochondrial function and fuel utilization and is closely linked with the development of insulin resistance in skeletal muscle in diabetes mellitus as well as fatty liver disease. In vitro data indicate that cellular levels of reactive oxygen species depend on the expression and activity of p53, ...
Hordern Matthew D - - 2010
It is unclear whether the glucose lowering effects of an exercise session are augmented by training. Therefore, we sought to assess the effects of a four-week exercise training program on the acute response of blood glucose to a single exercise session in patients with T2DM. A Quasi experimental design was ...
Pearson James - - 2011
Heat stress increases limb blood flow and cardiac output (Q) in humans, presumably in sole response to an augmented thermoregulatory demand of the skin circulation. Here we tested the hypothesis that local hyperthermia also increases skeletal muscle blood flow at rest and during exercise. Hemodynamics, blood and tissue oxygenation, and ...
Skein Melissa - - 2010
PURPOSE:: The aim of this study was to determine the effects of 30h sleep deprivation on consecutive day intermittent-sprint performance and muscle glycogen content. METHODS:: Ten male, team-sport athletes performed a single day 'baseline' session, and two consecutive-day experimental trials separated either by a normal night's sleep (CONT1 and CONT2) ...
Powers Scott K - - 2010
The observation that muscular exercise is associated with oxidative stress in humans was first reported over 30years ago. Since this initial report, numerous studies have confirmed that prolonged or high-intensity exercise results in oxidative damage to macromolecules in both blood and skeletal muscle. Although the primary tissue(s) responsible for reactive ...
Saborido Ana - - 2011
Anabolic androgenic steroids are used in the sport context to enhance muscle mass and strength and to increase muscle fatigue resistance. Since muscle fatigue has been related to oxidative stress caused by an exercise-linked reactive oxygen species (ROS) production, we investigated the potential effects of a treatment with the anabolic ...
Wahl Patrick - - 2010
The purpose of the present study was to compare the acute hormonal response to a short-term high-intensity training (HIT) versus a high-volume endurance training (HVT) and to investigate the effects of acid-base status on cytokines involved in angiogenesis (VEGF and bFGF). Eleven subjects participated in three experimental trials. Two times ...
Heaney Jennifer L J - - 2010
Low or blunted cardiovascular and cortisol reactions to acute psychological stress have been shown to characterise those with a tobacco or alcohol dependency. The present study tested the hypothesis that exercise dependency would be similarly associated with blunted reactivity. Young female exercisers (N=219) were screened by questionnaire for exercise dependence. ...
Miyamoto Shoichi - - 2011
Whole-body periodic acceleration (WBPA) has been developed as a passive exercise device capable of improving endothelial function by applying pulsatile shear stress to vascular endothelium. We hypothesized that treatment with WBPA improves exercise capacity, myocardial ischemia, and left ventricular (LV) function because of increased coronary and peripheral vasodilatory reserves in ...
Tryniszewski Wieslaw - - 2010
Most of the methods don't give the comparison between blood flow at rest and after exercise. Nuclear medicine allows for such assessment and determination of muscle perfusion indexes. The aim of the study was the comparison of the radioisotopic assessment of lower limbs perfusion at rest and after exercise in ...
Huang Chun-Jung - - 2010
The purpose of this study was to examine the changes in catecholamines (epinephrine [EPI] and norepinephrine [NE]), interleukin-2 (IL-2) and a biomarker of oxidative stress (8-isoprostane) in healthy individuals who were exposed to a dual challenge (physical and psychological stress). Furthermore, this study also examined the possible relationships between catecholamines ...
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