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Results 601 - 650 of 1519
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Martin Jeffrey S - - 2011
BackgroundIncreased elastic conduit artery stiffness with aging is associated with early wave reflection and increased wasted left ventricular pressure energy (LVE(W)). The effects of aging on central hemodynamics during exercise have not been well characterized. This study sought to investigate changes in central hemodynamics during cycle exercise in young, middle-aged, ...
Nedvidkova Jara - - 2011
OBJECTIVE: Ghrelin is predominantly produced by the stomach and the growth hormone (GH)-ghrelin feedback loop between the stomach and the pituitary gland has recently been suggested. The disruption of the gut-brain axis might be involved in bulimia nervosa (BN). METHODS: We investigated responses of plasma GH, ghrelin, and neuropeptide Y ...
Fortes Matthew B - - 2011
It has been suggested that tear fluid is isotonic with plasma, and plasma osmolality (Posm) is an accepted, albeit invasive, hydration marker. Our aim was to determine if tear fluid osmolarity (Tosm) assessed using a new, portable, non-invasive, rapid collection and measurement device tracks hydration. PURPOSE:: To compare changes in ...
Gothe Neha P NP Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, 906 S. Goodwin Avenue, Urbana, IL 61801, - - 2011
This 12-month, 2 arm, single blind randomized controlled exercise trial examined relationships among changes in multidimensional self-esteem as a function of intervention mode (i.e., walking vs. flexibility-toning-balance). Data were collected on three equidistant occasions (baseline, 6 and 12 months). One-hundred seventy-nine older adults (M(age) = 66.38) began the study and ...
Yunoki Takahiro - - 2011
In order to test our hypothesis that muscle condition has an effect on the cognition of self-motion and consequently on the ventilatory response during exercise, six healthy subjects performed a moderate incremental exercise test (IET) on a cycle ergometer under two conditions [resistance exercise condition (REC) and control condition (CC)]. ...
Fall Lewis - - 2011
Objective Patients with arterial occlusive disease are typically hypoxaemic, and exercise is prescribed for rehabilitation. Both stressors independently contract plasma volume (PV), which may influence clinical interpretation of a patient's thrombogenicity. The aim of the study was to emphasise the conceptual significance of PV correction. Methods and Results Venous plasma ...
Brophy-Williams Ned N School of Sport Science, Exercise & Health, the University of Western Australia , - - 2011
The purpose of the study was to determine the effects of cold water immersion (CWI) performed immediately or 3 h after a high intensity interval exercise session (HIIS) on next-day exercise performance. Eight male athletes performed three HIIS at 90%VO2max velocity followed by either a passive recovery (CON), CWI performed ...
Foster Philip P - - 2011
Lifestyle factors such as intellectual stimulation, cognitive and social engagement, nutrition, and various types of exercise appear to reduce the risk for common age-associated disorders such as Alzheimer's disease (AD) and vascular dementia. In fact, many studies have suggested that promoting physical activity can have a protective effect against cognitive ...
Hausswirth Christophe - - 2011
Enhanced recovery following physical activity and exercise-induced muscle damage (EIMD) has become a priority for athletes. Consequently, a number of post-exercise recovery strategies are used, often without scientific evidence of their benefits. Within this framework, the purpose of this study was to test the efficacy of whole body cryotherapy (WBC), ...
Smart Neil A - - 2011
Background. We pooled data from four studies, to establish whether exercise training programs were able to modulate systemic cytokine levels of tumour necrosis factor-alpha (TNF-alpha) and interleukin-6 (IL-6). A second aim was to establish if differences in ExT regimens are related to degree of change in cytokines and peak VO(2). ...
Caulfield Brian B Institute for Sport and Health, University College Dublin, Belfield, Dublin 4, Ireland. - - 2011
We need to find novel ways of increasing exercise participation, particularly in those populations who find it difficult to participate in voluntary exercise. In recent years researchers have started to investigate the potential for using electrical stimulation to artificially stimulate a pattern of muscle activity that would induce a physiological ...
Minov Jordan - - 2011
In order to assess prevalence and characteristics of exercise-induced respiratory symptoms (EIRSs) and exercise-induced bronchoconstriction (EIB) in health care workers, we performed a cross-sectional study including 48 female nurses from primary care settings and an equal number of female office workers studied as a control group. The evaluation of examined ...
Golbidi Saeid - - 2011
Physical inactivity is increasingly recognized as modifiable behavioral risk factor for cardiovascular diseases. A partial list of proposed mechanisms for exercise-induced cardioprotection include induction of heat shock proteins, increase in cardiac antioxidant capacity, expression of endoplasmic reticulum stress proteins, anatomical and physiological changes in the coronary arteries, changes in nitric ...
Brauer Jeremy A - - 2011
A 58-year-old man presented for evaluation and treatment of non-tender, non-pruritic, annular patches on the right temple and frontal aspect of the scalp that reddened with exercise. A biopsy specimen showed a purpuric dermatitis with features of lymphocytic vasculitis; a diagnosis of exercise-induced progressive pigmentary purpura was made. Whereas progressive ...
Dalbo Vincent J - - 2011
This study examined mRNA expression patterns for atrogin-1 and muscle ring finger-1 (MuRF-1) before and 24 hours after a resistance training bout. Furthermore, basal, 5-minute and 24-hour postexercise serum concentrations of cortisol and insulin like growth factor-1 (IGF-1) and the relationships between these hormones and the genetic expression patterns of ...
Hotta Norio - - 2011
We investigated whether intense interval training on a cycle ergometer would prevent loss of muscle strength and atrophy in the human calf during unilateral lower limb suspension (ULLS). The present study involved 11 healthy men. We defined unloading leg and contralateral leg as ULLS-leg and CONT-leg, respectively. The subjects were ...
Cosio-Lima Ludmila M LM Department of Health, Leisure, and Exercise Science, University of West Florida, Pensacola, FL, - - 2011
Components of immune function are affected by physical activity in an adverse environment. The purpose of this study was to compare plasma differences in inflammatory cytokines including tumor necrosis factor α (TNF-α) and interleukin 6 (IL-6), in addition to the stress hormone cortisol, during prolonged cycling under normal and hot ...
Schlader Zachary J - - 2011
This study examined the role of skin temperature on self-selected exercise intensity (i.e., power output). Eight well-trained, male cyclists completed two 60 min self-paced cycling bouts during which they completed as much work as possible. Using a liquid-perfused suit, skin temperature (T (Sk)) was changed during the two trials such that ...
Fetherman Debra L - - 2011
A Transtheoretical Model (TTM) goal-setting tool was used during strength training in women. Volunteers (mean age = 69, N = 27) were assigned to a strength training only or strength training/behavior change 12-week intervention. A pre/posttest, quasiexperimental design assessed TTM constructs, Health-Related Quality of Life, and functional fitness measurements. Multiple ...
El-Sayed Mahmoud S - - 2011
The aim of the present study was ascertain the effects posture and exercise modality on the main determinants of blood rheology. Thirteen subjects performed two exercise trials, in random order, at approximately 70% VO(2) max for 45-min. One trial was performed on a motorized treadmill at an intensity corresponding to ...
de Koning Jos J - - 2011
Athletic competition has been a source of interest to the scientific community for many years, as a surrogate of the limits of human ambulatory ability. One of the remarkable things about athletic competition is the observation that some athletes suddenly reduce their pace in the mid-portion of the race and ...
Enea Carina - - 2011
Physical exercise is known to strongly stimulate the endocrine system in both sexes. Among these hormones, androgens (e.g. testosterone, androstenedione, dehydroepiandrosterone) play key roles in the reproductive system, muscle growth and the prevention of bone loss. In female athletes, excessive physical exercise may lead to disorders, including delay in the ...
Navratil Marta - - 2011
We report a case of a 17-year-old female adolescent who experienced an episode of exercise-induced anaphylactic reaction following ingestion of tuna sandwich (from soy containing canned tuna). Her medical history revealed that she had previously had one episode of urticaria after ingestion of sulfamethoxazole with trimethoprim and anaphylactic reaction after ...
Hadley David M - - 2011
Background: Cardiac repolarization adaptation to cycle length change is patient dependent and results in complex QT-RR hysteresis. We hypothesize that accurate patient-specific QT-RR curves and rate corrected QT values (QTc) can be derived through patient-specific modeling of hysteresis. Method and Results: Model development was supported by QT-RR observations from 1959 ...
Dadkhah Shahriar - - 2011
Diagnostic stress echo testing is commonly performed in patients with known or suspected cardiovascular disease. There has been considerable debate in management of exercise induced non-sustained ventricular tachycardia (NSVT). In this case report, we present our experience with a case of exercise induced NSVT, and subsequent angiographically significant left anterior ...
Lee Jin - - 2011
Purpose: Hyperthermia-induced apoptosis is mediated by mitochondrial pathway, and is temporally correlated with alterations in mitochondrial morphology in neuroepithelial cells. In addition, regular exercise up-regulates heat shock proteins (HSPs) that inhibit apoptosis. However, embryo-protective effects of maternal exercise against heat exposure during pregnancy have not been fully understood yet. Materials ...
Henagan Tara M - - 2011
The purpose of this study was to determine whether resistance exercise training-induced reductions in inflammation are mediated via melanocortin 3 receptor expression in obese (BMI 32.7 ± 3.7) women (65.6 ± 2.8 yrs) randomized to either a control (N = 11) or resistance training group (N = 12). The resistance trained ...
Annesi James J - - 2011
The relationship of exercise to weight loss, beyond minimal caloric expenditures possible in obese and deconditioned individuals, requires clarification. We assessed whether changes in theory-based psychological variables associated with participation in an exercise treatment extended to psychologically based predictors of controlled eating and weight and waist-circumference reductions. A group of ...
Horne Jim - - 2011
This was a realistic military-type exercise assessing unexpected, abrupt early-morning awakening effects on immediate 'executive function' and the ability to comprehend and deal with a sudden emergency under a changing situation. Twenty (average age 21 years) healthy, highly motivated junior officer reservists were assigned randomly to two equal, independent groups, unforewarned ...
Trilk Jennifer L - - 2010
Very high-intensity, low-volume, sprint interval training (SIT) increases muscle oxidative capacity and may increase maximal oxygen uptake ([Formula: see text]), but whether circulatory function is improved, and whether SIT is feasible in overweight/obese women is unknown. To examine the effects of SIT on [Formula: see text] and circulatory function in ...
Hopkins Sarah A - - 2010
Context & Objective:  A recent paper by our group reported that regular aerobic exercise during pregnancy led to lower fetal IGF-I and IGF-II concentrations and a modest reduction in offspring birth weight when compared with the offspring of non-training control participants. Maternal hormonal alterations in response to exercise training may ...
Ouedraogo N - - 2011
Changes in chest transcutaneous-pO(2) at rest (ΔtcpO(2)) mimic absolute changes in arterial-pO(2) during moderate exercise, although the absolute starting values may dramatically differ. We retrospectively studied 485 patients (group 1), prospectively studied 292 new patients (group 2) and estimated the intra-test and the test-retest reproducibility of ΔtcpO(2) during constant-load treadmill ...
Ali Ajmol - - 2010
The aim of this study was to examine sensory perceptions towards different formulations of sports drinks when consumed before, at various points during, and following exercise. Following familiarisation 14 recreational runners underwent four trials in a single blind counterbalanced design. Each trial utilised one of four different solutions: 7.5% carbohydrate, ...
Cheema Birinder Singh Bobby - - 2010
The purpose of this study was to evaluate the effect of a 12-week intradialytic progressive resistance training (PRT) regimen on circulating pro- and anti-inflammatory cytokines. Forty-nine patients (62.6 ± 14.2 years) were recruited from the outpatient hemodialysis unit of the St. George Public Hospital, Sydney, Australia. Patients were randomized to: PRT + usual care (n = 24) ...
Košta Vana - - 2011
Physical exercise can induce immunohistochemical changes and cell proliferation in the hippocampus. One of the main effects of prolonged exercise is resting bradycardia, most probably caused by enhanced vagal activity. To investigate whether physical exercise can cause neurochemical and morphological changes in vagal afferent neurons, we performed immunohistochemical studies of ...
Cannon Daniel T - - 2011
The mechanisms determining exercise intolerance are poorly understood. A reduction in work efficiency in the form of an additional energy cost and oxygen requirement occurs during high-intensity exercise and contributes to exercise limitation. Muscle fatigue and subsequent recruitment of poorly efficient muscle fibres has been proposed to mediate this decline. ...
Boyas Sébastien - - 2011
The purpose of endurance time (T (lim)) prediction is to determine the exertion time of a muscle contraction before it occurs. T (lim) prediction would then allow the evaluation of muscle capacities limiting fatigue and deleterious effects associated with exhaustive exercises. The present study aimed to analyze the influence of ...
Bean Jonathan F JF Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, Massachusetts, USA. - - 2010
From among physiological attributes commonly targeted in rehabilitation, to identify those in which changes led to clinically meaningful differences (CMDs) in mobility outcomes. Secondary analysis of data collected for a randomized controlled trial of exercise using binary outcomes defined by recording a large CMD (Short Physical Performance Battery (SPPB)=1 unit; ...
Majerczak J - - 2010
In the present study fifteen male subjects (age: 22.7 ± 0.5 years; BMI: 23.5 ± 0.6 kg x m⁻²; VO₂(max) 46.0 ± 1.0 mL x kg⁻¹ x min⁻¹) performed 5 week moderate intensity endurance training. The training resulted in a significant increase in maximal oxygen uptake (VO₂(max)) (P=0.048) and power ...
Sato Kohei - - 2010
The purpose of the present study was to elucidate the effect of unilateral lower limb suspension (ULLS) on aerobic capacity during one-legged cycle exercise and whether the change in aerobic exercise capacity after ULLS with or without intensive interval training is related to the change in skeletal muscle volume. There ...
van den Hoven R - - 2011
In this preliminary study, time-dependent changes in plasma CK and AST activity, tyrosine (Tyr), 3-methyl-histidine (3mHis), glucose and lactate concentrations were analysed in nine horses under two different conditions. Furthermore, intramuscular concentrations of Tyr, 3mHis and activities of cathepsin B, acid phosphatase (ACP), glucose-6-phosphate dehydrogenase (G6PDH) and mRNA expression of ...
Kahn Susan R - - 2011
Exercise training may have the potential to improve post-thrombotic syndrome, a frequent, chronic complication of deep venous thrombosis. We conducted a randomized controlled two-centre pilot trial to assess the feasibility of a multicentre-based evaluation of a six-month exercise training program to treat post-thrombotic syndrome and to obtain preliminary data on ...
Bittencourt Maria F Q P - - 2010
Unlike humans, who communicate in frequency bands between 250 Hz and 6 kHz, rats can communicate in frequencies above 18 kHz. Their vocalization types depend on the context and are normally associated to subjective or emotional states. It was reported significant vocal changes due to administration of replacement testosterone in ...
Serteyn D - - 2010
Intense physical exercise can induce the degranulation of neutrophils leading to an increase in plasma concentration of the neutrophil marker enzymes myeloperoxidase (MPO) and elastase (ELT). These enzymes have pro-oxidative and pro-inflammatory properties and may play a role in the exercised-induced muscular damage. To measure MPO and ELT concentrations in ...
Bailey Stephen J - - 2011
We investigated the influence of the antioxidant N-acetylcysteine (NAC) on plasma nitrite concentration ([NO₂⁻]), pulmonary oxygen uptake (V(O₂)) kinetics and exercise tolerance. Eight males completed 'step' moderate- and severe-intensity cycle exercise tests following infusion of either NAC (125 mg kg⁻¹ h⁻¹ for 15 min followed by 25 mg kg⁻¹ h⁻¹ ...
Nikolaidis Michalis G - - 2011
The level of F₂-isoprostanes (F₂-IsoP) in blood or urine is widely regarded as the reference marker for the assessment of oxidative stress. As a result, nowadays, F₂-IsoP is the most frequently measured oxidative stress marker. Nevertheless, determining F₂-IsoP is a challenging task and the measurement is neither free of mishaps ...
Garcia Frederico Duarte - - 2011
Abnormal vasopressin (VP) and oxytocin (OT) signaling may contribute to the altered activity of the hypothalamo-pituitary-adrenal (HPA) axis in major depression; however, the underlying mechanisms remain uncertain. This study characterized plasma levels and affinities of OT- and VP-reactive autoantibodies (autoAbs) in relation to disease severity and plasma cortisol response to ...
Afshar R - - 2010
Physical function limitation is a common disorder in chronic hemodialysis (HD) patients, relating to increased morbidity and mortality. The aim of this study was to determine the effects of aerobic and resistance trainings on blood lipids and inflammation status in HD patients. Out of 30 volunteer males who had been ...
Westermann C M - - 2011
The objective of this study is to assess the influence of acute exercise, training and intensified training on the plasma amino acid profile. In a 32-week longitudinal study using 10 Standardbred horses, training was divided into four phases, including a phase of intensified training for five horses. At the end ...
Wakshlag J J - - 2010
C-reactive protein (CRP) and cardiac troponin I (cTnI) are biomarkers of systemic inflammation and cardiac damage, respectively. To investigate the effects of short-duration high-intensity exercise on plasma cTnI and serum CRP concentrations in sprint racing sled dogs. Twenty-two Alaskan sled dogs of 2 different teams participating in a 2-day racing ...
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