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Results 351 - 400 of 1335
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Horiuchi Masahiro - - 2010
To investigate the effects of a 100-mg oral single-dose administration of sarpogrelate hydrochloride (SH) on saturation O(2) (StO(2)) of calf muscle in healthy subjects experiencing simulated peripheral arterial disease (0.6 ankle brachial pressure index). Ten subjects performed three kinds of plantar flexion exercises at a work rate of 50% of ...
Pratali Lorenza - - 2010
Real time three dimensional (RT3D) echocardiography is an accurate and reproducible method for assessing left ventricular shape and function. assess the feasibility and reproducibility of RT3D stress echocardiography (SE) (exercise and pharmacological) in the evaluation of left ventricular function compared to 2D. One hundred eleven patients with known or suspected ...
Djordjevic Dusica - - 2010
Exercise increases production of reactive oxygen and nitrogen species (RONS) via several mechanisms. Inter alia, increased blood flow during exercise exposes endothelial cells to shear stress, resulting in increased nitric oxide (NO) production. Increased oxygen consumption or hypoxia during exercise induces increased production of superoxide anion radical (O(2) (-)). This ...
Weng Kaili K Faculty of Engineering, University of Technology Sydney, Broadway, NSW, 2007 Australia. - - 2010
This paper investigates the application of a multi-loop PID controller in an automated treadmill exercise machine. The approach is to design a computer-controlled treadmill control system for the regulation of heart rate (HR) during treadmill exercise. A single-input and multiple-output (SIMO) controller was implemented to fast track a given heart ...
Ostojic Sergej M SM Exercise Physiology Lab, Biomedical Sciences Department, Faculty of Sport and Tourism, Metropolitan University, Radnicka 30/II, 21000, Novi Sad, Serbia. - - 2010
This study tested the hypothesis that athletes participating in intermittent sports would exhibit a faster heart rate recovery (HRR) during the initial phase (<30 s) following maximal exercise than athletes participating in continuous endurance sports. Forty-six male athletes were allocated into continuous (CNT, n = 24) or intermittent groups (INT, ...
Borel Benoit - - 2010
The aim of this article is to determine correspondences between three levels of continuous and intermittent exercise (CE and IE, respectively) in terms of steady-state oxygen uptake (VO(2SS)) and heart rate (HR) in children. Fourteen healthy children performed seven exercises on a treadmill: one graded test for the determination of ...
Sala-Mercado Javier A JA Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan, - - 2010
Ischemia of active skeletal muscle elicits a pressor response termed the muscle metaboreflex. We tested the hypothesis that in normal dogs during dynamic exercise, graded muscle metaboreflex activation (MMA) would progressively attenuate spontaneous heart rate baroreflex sensitivity (SBRS). The animals were chronically instrumented to measure heart rate (HR), cardiac output ...
Peeling Peter - - 2009
Urinary hepcidin, inflammation, and iron metabolism were examined during the 24 hr after exercise. Eight moderately trained athletes (6 men, 2 women) completed a 60-min running trial (15-min warm-up at 75-80% HR(peak) + 45 min at 85-90% HR(peak)) and a 60-min trial of seated rest in a randomized, crossover design. ...
Hayes Philip R - - 2009
PURPOSE: The aim of this study was to develop a laboratory-based treadmill simulation of the on-course physiological demands of an 18-hole round of golf and to identify the underlying physiological responses. METHODS: Eight amateur golfers completed a round of golf during which heart rate (HR), steps taken, and global positioning ...
Foster Carl - - 2009
The exercise intensity at the Talk Test (TT) has been shown to be highly correlated with objective physiological markers, a useful outcome marker in patients with heart disease, a useful tool for avoiding exertional ischemia, and responsive to both positive and negative changes in exercise capacity. This randomized observational study ...
Bridge Craig A - - 2009
PURPOSE: To investigate the physiological responses and perceived exertion during international Taekwondo competition. METHODS: Eight male Taekwondo black belts (mean +/- SD, age 22 +/- 4 y, body mass 69.4 +/- 13.4 kg, height 1.82 +/- 0.10 m, competition experience 9 +/- 5 y) took part in an international-level Taekwondo ...
Tordi Nicolas - - 2009
Aerobic exercises (of sufficient duration and intensity) decreases arterial stiffness. However, the direct relationship between the type of aerobic exercise (i.e. constant versus interval) and the alteration in arterial stiffness has been poorly explored. We evaluated the hemodynamic responses of 11 healthy males (22.5 +/- 0.7 years, height 177.7 +/- ...
Phan Thanh Trung - - 2010
BACKGROUND: This study assessed the chronotropic response to exercise and heart rate (HR) recovery after exercise in a carefully phenotyped group of patients with heart failure with preserved left ventricular ejection fraction (HfpEF) and a control group of similar age and gender distribution. METHODS AND RESULTS: We studied 41 patients ...
Mauger Alexis R - - 2010
To establish whether acetaminophen improves performance of self-paced exercise through the reduction of perceived pain, 13 trained male cyclists performed a self-paced 10-mile (16.1 km) cycle time trial (TT) following the ingestion of either acetaminophen (ACT) or a placebo (PLA), administered in randomized double-blind design. TT were completed in a ...
Akcakoyun Mustafa - - 2010
BACKGROUND: Heart rate recovery (HRR) and chronotropic incompetence (CI) in patients with subclinical hypothyroidism (SCH) has not been explored previously. The aim of the present study was to evaluate the HRR and CI in patients with SCH. METHODS: Twenty-five patients (11 men, 14 women with a mean age of 36 ...
Duffell Lynsey Diane - - 2010
Objectives. This study is to compare relationships between muscle size, strength, and power output (PO) in trained spinal cord injured (SCI) people and able-bodied (AB) people; and to compare methodologies for measuring PO during functional electrically stimulated (FES) cycling. Subjects. Trained SCI people (N= 5) and five AB subjects of similar physical ...
Duncan Kathleen - - 2011
This study measured the impact of the Exercise Adherence Management Program (EAMP) provided to 20 patients with heart failure (HF) who participated in a combined resistance and aerobic exercise training program during two 12-week phases. The EAMP included strategies designed to support exercise self-efficacy and adherence. Results indicate that an ...
Klika Riggs J - - 2009
Changes in aerobic capacity were evaluated after 12 weeks of training among a motivated heterogeneous group of cancer survivors (N = 54 [41 women and 13 men]), living at moderate altitude. Changes in power at lactate threshold (PT(lact)), peak power (P(peak)), and peak oxygen uptake (VO(2) peak) were evaluated in ...
Millar Philip J - - 2009
Sprint interval training involves short bouts of high-intensity exercise and has produced training responses similar to those of endurance training. The effects of multiple supramaximal exercise bouts on neurocardiac modulation have not been examined. Therefore, we investigated the recovery of heart rate (HR) variability and nonlinear HR dynamics in 10 ...
Kim Maeng-Kyu - - 2009
BACKGROUND: Heart rate recovery (HRR) as a function of vagal reactivation, which is an independent risk predictor for cardiovascular disease and mortality, is strongly associated with metabolic syndrome. METHODS: Middle-aged obese men (metabolic syndrome, n = 20; non-metabolic syndrome, n = 22) classified on the basis of Adult Treatment Panel ...
Aizawa Kunihiko - - 2009
The authors evaluated the effects of acute arm-cycling exercise on arterial stiffness of the brachial artery (BA: working limb) and posterior tibial artery (PTA: nonworking limb) in healthy older participants. Eleven participants were tested to evaluate BA and PTA stiffness. Blood pressure (BP), heart rate (HR), and arterial stiffness indices ...
Carvalho Vitor Oliveira - - 2009
BACKGROUND: The Borg Scale may be a useful tool for heart failure patients to self-monitor and self-regulate exercise on land or in water (hydrotherapy) by maintaining the heart rate (HR) between the anaerobic threshold and respiratory compensation point. METHODS AND RESULTS: Patients performed a cardiopulmonary exercise test to determine their ...
Budde Henning - - 2010
Little is known, about the influence of different exercise intensities on cognition, the concentration of steroid hormones (SHs), and their interaction in adolescents. Sixty high school students from the 9th grade were randomly assigned to two experimental (EG 1, EG 2) and a control group (CG). Saliva collection took place ...
von Leupoldt Andreas - - 2010
Dyspnea is the cardinal symptom of chronic obstructive pulmonary disease (COPD). Affective states can profoundly impact upon the perception of dyspnea, but little is known about this relationship in patients with COPD. We, therefore, examined the impact of viewing positive versus negative affective picture series on perceived dyspnea during two ...
Matsushigue Karin A - - 2009
The aim of the present study was to determine the time structure and physiological responses during Songahm Taekwondo (TKD) competition and to compare these variables between winner and non-winner athletes. Fourteen men subjects were analyzed. Blood lactate concentration (LA) and heart rate (HR) were determined before and after the match. ...
Mielke Michelle - - 2009
The purpose of the present study was to examine the oxygen uptake (Vo2), heart rate (HR), and ratings of perceived exertion (RPE [OMNI-Leg 0-10]) responses during continuous 1-hour cycle ergometer rides at the PWCVo2 (physical working capacity at the oxygen consumption threshold). Eight subjects (mean age +/- SD = 23 ...
Cornelissen V A - - 2010
We aimed to investigate the effects of endurance training intensity (1) on systolic blood pressure (SBP) and heart rate (HR) at rest before exercise, and during and after a maximal exercise test; and (2) on measures of HR variability at rest before exercise and during recovery from the exercise test, ...
Lambrick Danielle M - - 2009
This study assessed the utility of a single, continuous exercise protocol in facilitating accurate estimates of maximal oxygen uptake V(O)(2max) from submaximal heart rate (HR) and the ratings of perceived exertion (RPE) in healthy, low-fit women, during cycle ergometry. Eleven women estimated their RPE during a continuous test (1 W ...
Braunschweig Frieder - - 2009
To compare haemodynamic responses during the 6-min walk test (6MWT) and daily living activities in heart failure (HF) patients. Eighteen HF patients received an implantable haemodynamic monitor, which continuously measured heart rate (HR), estimated pulmonary artery diastolic pressure (ePAD), and several right ventricular (RV) pressure parameters. During the 6MWT, haemodynamics ...
Allgrove Judith E - - 2009
This study investigated the effect of a fed or fasted state on the salivary immunoglobulin A (s-IgA) response to prolonged cycling. Using a randomized, crossover design, 16 active adults (8 men and 8 women) performed 2 hr of cycling on a stationary ergometer at 65% of maximal oxygen uptake on ...
Bernard Thierry - - 2009
PURPOSE: The aim of this study was to evaluate the power output (PO) during the cycle phase of the Beijing World Cup test event of the Olympic triathlon in China 2008. METHODS: Ten elite triathletes (5 females, 5 males) performed two laboratory tests: an incremental cycling test during which PO, ...
Alberton C L - - 2009
AIM: The aim of the current study was to analyze the heart rate (HR), oxygen uptake (V.O(2)), and percentage of maximal HR (%HR(max)) and V.O(2) (%V.O(2max)) responses to stationary running exercise performed at different cadences on land (LA) and in water (WA). METHODS: The sample comprised 12 apparently healthy women ...
Ryan Eric D - - 2009
The purpose of present study was to examine the acute effects of a thermogenic nutritional supplement on energy expenditure (EE) and cardiovascular function at rest, during low-intensity exercise, and recovery from exercise. Twenty-eight healthy sedentary participants (mean +/- SD; age, 22.3 +/- 1.9 years; body mass index, 24.0 +/- 3.7) ...
Oliveira Anderson Souza - - 2009
The main objective of this study was to compare electromyography (EMG), heart rate (HR), and perceived exertion (PE) during different elbow flexion exercises in standing position (biceps curl [BC] and adapted BC [ABC]) and seated position (preacher BC [PBC]). Twenty healthy subjects performed the dynamic 1-repetition maximum (1RM) test. The ...
Karlsson Lars L - - 2009
Four subjects were studied before and during a 16-day space flight. The test included 2min of rest, 2min of sustained handgrip (SHG), and 2min of post-exercise circulatory occlusion (PECO). Heart rate (HR) and mean arterial pressure (MAP) responses to central command and mechanoreceptor stimulation were determined from the difference between ...
Aijaz Bilal - - 2009
Poor exercise capacity and abnormal heart rate (HR) recovery during exercise testing predict poor long-term outcomes. The relationship between these parameters in patients with coronary heart disease (CHD) is unknown. Whether abnormal HR recovery adds to the prognostic value of poor exercise capacity in patients with CHD is unclear. A ...
Omiya Kazuto - - 2009
The aim of this study was to clarify the mechanism of impaired exercise tolerance in chronic sleep-restricted conditions by investigating variables related to heart-rate (HR) response to sympathetic nervous stimulation. Sixteen healthy men (mean age 21.5 years) were tested in a control state, acute sleep-loss state, and chronic sleep-restricted state. ...
Leicht Anthony S - - 2009
The reduction of core body temperature (T(C)) is vitally important in the treatment of hyperthermia; however, little is known regarding the impact of cooling treatments on the autonomic control of heart rate (HR). The aim of the present study was to examine the influence of three field-based hyperthermia treatments on ...
La Torre A - - 2009
AIM: Bouldering contests consist of a series of short routes, called ''problems'', which shall be climbed without ropes. The purpose of this study was to determine blood lactate [Lac] concentration and heart rate (HR) adaptations both during an official bouldering competition and a simulated contest. METHODS: Eleven Italian elite climbers ...
Le Vy-Van - - 2010
Submaximal exercise testing can be useful for individuals with limitations to performing maximal exercise. Recent studies suggested that a low workload at a heart rate 100 beats/minute (HR(100)) was associated with a greater risk of cardiovascular (CV) mortality than maximal exercise capacity. This study evaluated the prognostic value of METs ...
Astorino T A - - 2009
Supramaximal testing is widely used to verify VO2max attainment, yet its efficacy in sedentary subjects is unknown. The aim of the study was to test this hypothesis in men and women completing maximal cycle ergometry. Fifteen sedentary subjects (age=22.4+/-3.9 year) completed incremental exercise, and returned at least 24 h later ...
Takken T - - 2009
To the authors' knowledge this is the first paper that has used the training impulse (TRIMP) 'methodology' to calculate workload demand. It is believed that this is a promising method to calculate workload in a range of professions in order to understand the relationship between work demands and aerobic fitness. ...
Siegel Shannon R - - 2009
Video games have become increasingly popular among young adults. The purpose of this pilot study was to determine if interactive video/arcade games, requiring physical activity to play, increase the energy expenditure (EE) and heart rate (HR) of young adults enough to elicit a training response. Thirteen male and female participants ...
Carey Daniel G - - 2009
The primary objective of this study was to determine whether physiological measurements obtained from one mode of testing and training could be applied to another mode, as in prescribing heart rate (HR) zone training from cyling to running. Secondary objectives were 1) to assess the validity of applying data from ...
Mignatti Andrea - - 2009
We investigated the relationship between resting heart rate (HR) and two measures of beta-1 receptor sensitivity/blockade: (1) the percentage of maximal predicted heart rate reached during exercise (%MPHR), and (2) the HR increase per unit of circulating norepinephrine (NE) or the chronotropic responsiveness index (CRI) in 28 patients with systolic ...
Banaszak PaweĊ‚ - - 2009
BACKGROUND: Exercise-induced hypertension following repair of the coarctation of the aorta (CoA) is a well known phenomenon. The most important functional parameters in the assessment of the effects of a surgical repair of CoA are the maximal pressure gradient in the descending aorta (GRAD) and systolic blood pressure (SBP). Results ...
Akutsu Yasushi - - 2009
BACKGROUND: Delayed heart rate (HR) recovery after treadmill exercise testing predicts mortality. Patients with suspected ischemic heart disease who cannot perform adequate treadmill exercise are typically evaluated with pharmacological stress myocardial perfusion imaging (MPI) studies, but little prognostic significance has been attributed to the hemodynamic response to vasodilator stress testing ...
Yano T - - 2008
The purpose of the present study was to examine the effect of change in blood volume in skin plus active muscle on heart rate drift during moderate exercise and heavy exercise for 30 min. Total hemoglobin concentration (Total Hb) in the vastus lateralis muscle plus its skin was determined by ...
Psycharakis Stelios G - - 2008
PURPOSE: To determine accurately the magnitude and changes in shoulder roll (SR) and hip roll (HR) throughout a 200-m maximum front crawl swim and whether SR and HR were associated with swimming velocity (V). Bilateral roll asymmetries and timing differences between SR and HR were also investigated. METHODS: Ten male ...
Kramer C K - - 2008
Diabetic retinopathy has been associated with cardiac autonomic dysfunction in both type 1 and type 2 diabetes mellitus (DM) patients. Heart rate (HR) changes during exercise testing indicate early alterations in autonomous tonus. The aim of the present study was to investigate the association of diabetic retinopathy with exercise-related HR ...
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