Search Results
Results 301 - 350 of 1219
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Millet G Y - - 2011
The purpose of this study was to examine the physiological and biological factors associated with ultra-endurance performance. Fourteen male runners volunteered to run on a treadmill as many kilometers as possible over a 24-h period (24TR). Maximal oxygen uptake (VO(2max)), velocity associated with VO(2max)(VO(2max)) and running economy (RE) at 8 ...
Chaolu Huhe - - 2011
Lifestyle-related diseases are associated with overeating and lack of exercise. The purpose of this study was to investigate the effect of exercise and high-fat diet on plasma adiponectin and nesfatin levels. Mice were housed for 4 weeks in 4 groups, which included the non-exercise and normal diet (SN), exercise and ...
Gologorsky Edward - - 2011
A 4-mm patent ductus arteriosus (PDA) was serendipitously diagnosed during intraoperative transesophageal echocardiography for a noncardiac procedure in an obese adult patient with a history of decreased exercise tolerance and dyspnea, despite a negative preoperative transthoracic examination. This uncommon event poses questions regarding the relevance of this finding to the ...
Edman Joel S - - 2011
Increasing prevalences of obesity and type 2 diabetes (T2DM) increase cardiovascular risks. Since poor diet and inadequate exercise are primary behavioral causes of obesity and T2DM, our objective was to examine health beliefs and associations with diet, exercise, and metabolic syndrome (MetSyndr) characteristics. A total of 117 overweight and obese ...
Vatansever-Ozen Serife S School of Physical Education and - - 2011
This study investigated the effects of a long bout of aerobic exercise on hunger and energy intake and circulating levels of leptin and acylated ghrelin. Ten healthy male subjects undertook two, 4 h trials in a randomized crossover design. In the exercise trial subjects ran for 105 min at 50% ...
Seo Dong-Il DI Neuromuscular Research Laboratory, Department of Health and Exercise Science, University of Oklahoma , - - 2011
Visfatin is a highly expressed protein with insulin-like functions located predominantly in visceral adipose tissue and has been linked to obesity and increased health risks. The purpose of this study was to examine the effects of 12 weeks of combined exercise training on visfatin and metabolic syndrome factors in obese ...
Annesi James J JJ YMCA of Metropolitan Atlanta, - - 2011
An emphasis on increasing self-regulation is an alternate to nutrition education, which has had poor results in the behavioral treatment of obesity. Although appropriately designed weight-loss treatments may enhance one's self-regulatory ability to control eating, whether improvements are moderated by psychosocial factors such as initial self-regulatory skills use, self-efficacy to ...
Alp Ayse A Diyarbakir Training and Research Hospital, Biochemistry Department , Diyarbakir, - - 2011
In order to understand whether exercise and caffeic acid phenethyl ester (CAPE) has an effect on obesity and weight control, we investigated the effects of CAPE, and exercise on lipid parameters (triglyceride, total cholesterol, HDL-C, LDL-C), and adipokine substances such as leptin and resistin in rats. 40 male rat were ...
Wang H Y - - 2010
The purposes of this study were to investigate the distribution characteristics of CAG repeat polymorphism in exon 1 of androgen receptor gene and the association of CAG polymorphism with VO₂max response to hypoxic training in North China Han men. Sixty-five healthy young men completed a 30-day HiHiLo training (living high, ...
Vella Chantal A - - 2011
The purpose of this study was to assess cardiac function and arteriovenous oxygen difference (a-vO(2) difference) at rest and during exercise in young, normal-weight (n = 20), and obese (n = 12) men and women who were matched for age and fitness level. Participants were assessed for body composition, peak oxygen consumption (VO(2peak)), and ...
Gordon D - - 2011
The purpose of this study was to address if there is an association between the plateau at V˙O (2max) and the anaerobic capacity. 9 well-trained cyclists (age 22.2 ± 3.5 yr, height 182.5 ± 5.0 cm, mass 75.7 ± 8.7 kg, V˙O (2max) 59.3 ± 4.8 ml x kg(-1) x ...
Wheatley Courtney M - - 2011
Exercise has been shown to be beneficial for patients with cystic fibrosis (CF), but for some CF patients there is a risk of desaturation, although the predicting factors are not conclusive or reliable. We sought to determine the relationship between the diffusion capacity of the lungs for nitric oxide and ...
Letombe A - - 2010
To establish the value of an early post-stroke evaluation of cardiorespiratory fitness in hemiparetic patients using a one-leg cycling exercise test and to analyze the impact of an adapted physical activity programme 12 weeks after the stroke. Eighteen hemiparetic stroke patients participated in the study. The subjects were randomly assigned ...
Spencer Matthew D - - 2011
This study compared the parameter estimates of pulmonary oxygen uptake (VO(2p)), heart rate (HR) and muscle deoxygenation (Δ[HHb]) kinetics when several moderate-intensity exercise transitions (MODs) were performed during a single visit versus several MODs performed during separate visits. Nine subjects (24 ± 5 years, mean ± SD) each completed two successive cycling MODs on six ...
Faisal Azmy - - 2010
Circadian rhythm has an influence on several physiological functions that contribute to athletic performance. We tested the hypothesis that circadian rhythm would affect blood pressure (BP) responses but not O(2) uptake (Vo(2)) kinetics during the transitions to moderate and heavy cycling exercises. Nine male athletes (peak Vo(2): 60.5 ± 3.2 ...
Painter Patricia - - 2011
Exercise capacity as measured by peak oxygen uptake (Vo₂(peak)) is low in hemodialysis patients. The present study assesses determinants of VO₂(peak) in patients with chronic kidney failure who either changed kidney replacement modality to frequent hemodialysis therapy or received a kidney transplant. Cohort study with assessment at baseline and 6 ...
Efthimiadis Georgios K - - 2011
Diminished functional capacity is common in hypertrophic cardiomyopathy (HCM), although the underlying mechanisms are complicated. We studied the prevalence of chronotropic incompetence and its relation to exercise intolerance in patients with HCM. Cardiopulmonary exercise testing was performed in 68 patients with HCM (age 44.8±14.6years, 45 males). Chronotropic incompetence was defined ...
Buys Roselien - - 2011
Exercise capacity in grown-ups with congenital heart disease (GUCH) is mostly reported by peak oxygen consumption (peak VO(2)). Our aim was to evaluate the maximal character of exercise tests, and to investigate submaximal measures of exercise capacity. Adults with Coarctation of the Aorta (COA, n=155), Tetralogy of Fallot (TOF, n=98), ...
da Cunha Felipe Amorim - - 2011
Exercise intensity is an important aspect of enhancing health-related fitness. Relationships between the percentages of heart rate reserve (%HRR), maximal oxygen uptake (%VO(2max)) and oxygen uptake reserve (%VO₂R) have been proposed as being effective for exercise intensity prescription. The present paper reviewed experimental studies published between 1966 and 2010, which ...
Kuspinar Ayse - - 2010
OBJECTIVE: To estimate, for persons with multiple sclerosis (MS), the extent to which peak oxygen consumption (Vo(2)peak) can be predicted by the results on submaximal tests. DESIGN: Cross-sectional study. SETTING: Three MS clinics in the Greater Montreal region, Canada. PARTICIPANTS: A center-stratified random sample of 135 women and 48 men ...
Werkman M S - - 2011
Increased work of breathing is considered to be a limiting factor in patients with cystic fibrosis (CF) performing aerobic exercise. We hypothesized that adolescents with CF and with static hyperinflation are more prone to a ventilatorily limited exercise capacity than non-static hyperinflated adolescents with CF. Exercise data of 119 adolescents ...
DiMenna Fred J - - 2010
We investigated whether the characteristic slowing of pulmonary oxygen uptake (VO2) kinetics during "work-to-work" exercise is attributable to elevations in baseline metabolic rate (VO2) as opposed to the elevated baseline work rate, per se. We hypothesized that a step transition to a higher work rate from "unloaded" cycling, but with ...
Bailey Stephen J - - 2010
It has recently been reported that dietary nitrate (NO(3)(-)) supplementation, which increases plasma nitrite (NO(2)(-)) concentration, a biomarker of nitric oxide (NO) availability, improves exercise efficiency and exercise tolerance in healthy humans. We hypothesized that dietary supplementation with L-arginine, the substrate for NO synthase (NOS), would elicit similar responses. In ...
Barron Anthony J AJ International Centre for Circulatory Health, Imperial College London and Imperial College NHS Trust, London, UK. - - 2010
Heart failure and ventilatory disease often coexist; both create abnormalities in cardiopulmonary exercise test measurements. The authors evaluated the relative dependency of a well-recognized index of heart failure, peak oxygen consumption (VO(2)), and 2 newer indices, the minute ventilation (VE)/carbon dioxide production (VCO(2)) slope and oxygen uptake efficiency slope (OUES), ...
Castro Renata R T - - 2010
The influence of a very fast ramp rate on cardiopulmonary variables at ventilatory threshold and peak exercise during a maximal arm crank exercise test has not been extensively studied. Considering that short arm crank tests could be sufficient to achieve maximal oxygen consumption (VO₂), it would be of practical interest ...
Vanhatalo Anni - - 2010
Dietary nitrate (NO(3)(-)) supplementation with beetroot juice (BR) over 4-6 days has been shown to reduce the O(2) cost of submaximal exercise and to improve exercise tolerance. However, it is not known whether shorter (or longer) periods of supplementation have similar (or greater) effects. We therefore investigated the effects of ...
Methvin Amanda B - - 2011
An increased minute ventilation ($$\dot{\hbox{ V }}$$e)/carbon dioxide production (Vco(2)) relationship, an expression of ventilatory inefficiency (VI), is associated with increased morbidity and mortality in patients with left ventricular systolic dysfunction (LVSD). A direct link between VI and a specific cardiac abnormality has not been established. We analyzed cardiopulmonary exercise ...
Salvadego Desy - - 2010
A functional evaluation of skeletal muscle oxidative metabolism was performed in a group of obese adolescents (OB). The various components of pulmonary O(2) uptake (Vo(2)) kinetics were evaluated during 10-min constant-load exercises (CLE) on a cycloergometer at different percentages of Vo(2max). The relationships of these components with the gas exchange ...
Shimazaki Yoshihiro - - 2010
Obesity and exercise are important elements associated with lifestyle-related diseases, and studies suggested that these factors may also be related to periodontitis. This study investigates the relationship between obesity and physical fitness and periodontitis. One thousand, one hundred and sixty Japanese subjects, aged 20 to 77 years, who participated in ...
Morotomi Nobuo - - 2010
To evaluate the effect of respiratory function and exercise capacity after omental flap transposition. From October 2005 to December 2006, we classified mediastinitis patients treated with omental flap transposition (OT group; n = 10) and patients who underwent only cardiovascular surgery without developing complications (control group; n = 25). Percent ...
Johnson M L - - 2010
We examined the effects of exercise intensity and training on rates of lipolysis, plasma free fatty acid (FFA) appearance (R(a)), disappearance (R(d)), reesterification (R(s)), and oxidation (R(oxP)) in postmenopausal (PM) women. Ten sedentary but healthy women (55 ± 0.6 yr) completed 12 wk of supervised endurance exercise training on a ...
Pressler Axel - - 2010
To evaluate the effect of structured vs. non-structured internet-delivered exercise recommendations on aerobic exercise capacity and cardiovascular risk profile in overweight sedentary employees. 140 employees of an automobile company (11% female, median age 48 years (range 25-60), BMI 29.0 kg/m(2) (25.0-34.8)) were randomized in a 3:2 ratio to an intervention ...
Kjelkenes Ida - - 2010
Anticipation before the start of exercise may influence the cardiopulmonary responses during exercise. If anticipation influences the responses differently with maximal and submaximal exercises, normative values for submaximal responses will not be comparable unless exercise has been continued to the same end point. Twelve healthy subjects (five men) aged 18-27 ...
Astorino Todd A - - 2010
Across various populations, verification testing is used to confirm VO(2)max attainment and has repeatedly shown similar VO(2)max values to those obtained from incremental exercise. Yet, many individuals show meaningful differences in VO(2)max between protocols, and an explanation for this is unknown. The aim of the study was to elucidate this ...
Drinkard Bart E - - 2010
To determine the exercise capacity of children and adolescents with Friedreich's Ataxia (FA) and to evaluate the effects of 6 months of idebenone treatment on exercise capacity. Exploratory endpoint in a randomized double-blind, placebo-controlled, phase II clinical trial designed to investigate the effects of idebenone on a biomarker of oxidative ...
Sato Kohei - - 2010
The blood flow regulation in vertebral system during dynamic exercise in humans remains unclear. We examined the blood flow responses in both the internal carotid artery (QICA) and vertebral artery (QVA) simultaneously during graded dynamic exercise by Doppler ultrasound to evaluate whether cerebrovascular responses to exercise were similar. In the ...
Dupont Gregory - - 2010
This study was designed to test the hypothesis that subjects having faster oxygen uptake (VO(2)) kinetics during off-transients to exercises of severe intensity would obtain the smallest decrement score during a repeated sprint test. Twelve male soccer players completed a graded test, two severe-intensity exercises, followed by 6 min of ...
Psilander Niklas - - 2010
Little is known about the effect of training on genetic markers for mitochondrial biogenesis in elite athletes. We tested the hypothesis that low-volume sprint interval exercise (SIE) would be as effective as high-volume interval exercise (IE). Ten male cyclists competing on national elite level (W (max) 403 ± 13 W, ...
Guazzi Marco - - 2010
Cardiopulmonary exercise testing (CPET) provides powerful information on risk of death in heart failure (HF). We sought to define the relative and additive contribution of the 3 landmark (CPET) prognostic markers--peak oxygen consumption (VO₂), minute ventilation/carbon dioxide production (VE/VCO₂) slope, and exercise periodic breathing (EPB)-to the overall risk of cardiac ...
Mendonca Goncalo V - - 2010
Persons with Down syndrome (DS) have diminished submaximal and peak work capacity. This study evaluated the dynamic response of oxygen uptake at onset and recovery (VO(2) kinetics) of constant-load exercise (moderate intensity 45% VO(2peak)) in adults with DS. A total of 27 healthy participants aged 18-50 years performed graded treadmill ...
Scharhag-Rosenberger F - - 2012
Lacking responses to endurance training (ET) have been observed for several variables. However, detailed analyses of individuals' responses are scarce. To learn more about the variability of ET adaptations, patterns of response were analyzed for each subject in a 1-year ET study. Eighteen participants [42±5 years, body mass index: 24±3 kg/m(2) ...
Barker Alan R - - 2010
The present study examined the effect of priming exercise on O(2) uptake (Vo(2)) kinetics during subsequent very heavy exercise in eight 9- to 13-yr-old boys. We hypothesised that priming exercise would 1) elevate muscle O(2) delivery prior to the subsequent bout of very heavy exercise, 2) have no effect on ...
Rooks Cherie R - - 2010
We conducted a systematic review and meta-regression analysis to quantify effects of exercise on brain hemodynamics measured by near-infrared spectroscopy (NIRS). The results indicate that acute incremental exercise (categorized relative to aerobic capacity (VO(2)peak) as low - <30% VO(2)peak; moderate - ≥30% VO(2)peak to <60% VO(2)peak; hard - ≥60% VO(2)peak ...
Al-Rahamneh H Q - - 2011
Each participant completed an arm-crank ramp exercise test to volitional exhaustion. To assess the utility of the rating of perceived exertion (RPE) to predict peak oxygen uptake (VO(2)peak) during arm ergometry in able-bodied participants and those with poliomyelitis. University of Jordan, Amman, Jordan. In all, 16 able-bodied and 15 participants ...
Kitzman Dalane W DW Cardiology Section, Department of Internal Medicine, Wake Forest University Health Sciences, Winston-Salem, NC, USA. - - 2010
Exercise intolerance is the primary symptom in older patients with heart failure and preserved ejection fraction (HFPEF); however, little is known regarding its mechanisms and therapy. Seventy-one stable elderly (70+/-1 years) patients (80% women) with compensated HFPEF and controlled blood pressure were randomized into a 12-month follow-up double-blind trial of ...
Woorons Xavier - - 2010
Eight men performed three series of 5-min exercise on a cycle ergometer at 65% of normoxic maximal O(2) consumption in four conditions: (1) voluntary hypoventilation (VH) in normoxia (VH(0.21)), (2) VH in hyperoxia (inducing hypercapnia) (inspired oxygen fraction [F(I)O(2)] = 0.29; VH(0.29)), (3) normal breathing (NB) in hypoxia (F(I)O(2) = ...
Wagner Peter D - - 2011
Maximal endurance exercise capacity is determined by a variety of factors, including maximal ability to transport O₂ to the muscle mitochondria and to use this O₂ for ATP generation ((.)V(O₂MAX)). This analysis combines the individually well-known O₂ mass conservation equations for the four critical steps in the O₂ transport pathway ...
Noordhof Dionne A - - 2010
Before the influence of divergent factors on gross efficiency (GE) [the ratio of mechanical power output (PO) to metabolic power input (PI)] can be assessed, the variation in GE between days, i.e. the test-retest reliability, and the within day variation needs to be known. Physically active males (n = 18) ...
Valkeinen H - - 2010
It is not known to what extent exercise programs increase maximal oxygen uptake (VO(2max)) in patients with coronary heart diseases (CHD). The purpose of this study is to determine the effect of exercise interventions on VO(2max) in subjects with CHD. Database search of randomized controlled trials was conducted from PubMed. ...
Laaksonen Marko S - - 2010
The association between muscle oxygen uptake (VO(2)) and perfusion or perfusion heterogeneity (relative dispersion, RD) was studied in eight healthy male subjects during intermittent isometric (1 s on, 2 s off) one-legged knee-extension exercise at variable intensities using positron emission tomography and a-v blood sampling. Resistance during the first 6 ...
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