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Results 301 - 350 of 1335
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Omkar S N SN Department of Aerospace Engineering, Indian Institute of Science, Bangalore, India. - - 2011
Biomechanical signals due to human movements during exercise are represented in time-frequency domain using Wigner Distribution Function (WDF). Analysis based on WDF reveals instantaneous spectral and power changes during a rhythmic exercise. Investigations were carried out on 11 healthy subjects who performed 5 cycles of sun salutation, with a body-mounted ...
Janssen Daniel - - 2010
The aim of the study was to train and test support vector machines (SVM) and self-organizing maps (SOM) to correctly classify gait patterns before, during and after complete leg exhaustion by isokinetic leg exercises. Ground reaction forces were derived for 18 gait cycles on 9 adult participants. Immediately before the ...
Caspers C - - 2011
In this meta-analysis of diving bradycardia in humans, we sought to quantify any heart rate (HR) reduction using a relatively simple mathematical function. Using the terms "diving reflex,""diving bradycardia,""diving response,""diving plus heart rate," databases were searched. Data from the studies were fitted using HR=c+aexp(-(t-t(0))/τ), where c is the final HR, ...
Yanagisawa Satoshi - - 2011
Aims Several treadmill exercise testing prognostic parameters have been identified in various populations. However, despite the widespread use of treadmill exercise testing, the prognostic value in very elderly patients has not been well characterized. The aim of this study was to assess the results of treadmill exercise testing in octogenarians, ...
Maciaszek Janusz - - 2011
The aim of the study was to assess the effects of SPB on a range of postural stability changes occurring after moderate exercise in elderly people. Twenty-seven males from the age of 65-81 years old (mean 71.6±4.9 years) took part in the study. The postural stability during bipedal quiet standing ...
Buhl R - - 2010
Electrocardiographic reference values of clinically normal horses during exercise are a prerequisite when evaluating horses with poor performance or horses presented with cardiac abnormalities (e.g. valvular regurgitation). No published studies have reported cardiac rhythms of clinically normal showjumping horses. To demonstrate the feasibility of obtaining exercise electrocardiogram (ECG) in normal ...
Kemmink A - - 2010
The quantity of glucose disposal during exercise (walk and trot) compared to rest by use of the hyperglycaemic clamp technique has not been reported previously and has relevance to nutritional requirements. Exercise (walk and trot) significantly increases glucose disposal compared to rest. Seven healthy Dutch Warmblood mares, all in dioestrus, ...
Geor R J - - 2010
There is limited information about factors regulating glucose utilisation post exercise in horses. To determine the effects of a single bout of moderate intensity exercise on measures of insulin-mediated (IMGU) and noninsulin-mediated (NIMGU) glucose uptake during a hyperglycaemic clamp (HC). Hyperglycaemic clamps were administered in random order to 8 Standardbreds ...
Trachsel D S - - 2010
Frequent supraventricular or ventricular arrhythmias during and after exercise are considered pathological in horses. Prevalence of arrhythmias seen in apparently healthy horses is still a matter of debate and may depend on breed, athletic condition and exercise intensity. To determine intra- and interobserver agreement for detection of arrhythmias at rest, ...
Barbesgaard L - - 2010
Exercise-associated arrhythmias are important differentials when evaluating poor performance sport horses. However, most studies of arrhythmias have been conducted in racehorses and therefore there is a paucity of knowledge concerning the prevalence and significance of exercise-associated arrhythmias in riding horses. The objective of this study was to examine the prevalence ...
Foreman J H - - 2010
Objective blinded efficacy data during exercise are lacking on the use of single-dose i.v. nonsteroidal anti-inflammatory drugs (NSAIDs) before, during and after exercise. Single i.v. doses of either phenylbutazone (PBZ) or flunixin meglumine (FM) would prove more efficacious than negative saline control (SAL) before, during and after exercise in a ...
Treiber K H - - 2010
Tools and criteria to evaluate and understand glucose metabolism are essential to optimise equine energy utilisation for exercise performance and reduced metabolic health risks. To re-evaluate models of glucose kinetics in the horse at rest and during endurance type exercise using a single injection technique and compartmental modelling. Twelve exercise ...
Wasmund Stephen L SL Division of Cardiology, University of Utah Health Sciences Center, Salt Lake City, Utah, - - 2011
Obesity is associated with significantly increased cardiovascular mortality that has been attributed, in part, to sympathetic activation. Gastric bypass surgery (GBS) appears to increase long-term survival in the severely obese, but the mechanisms responsible for this increase are still being sought. Heart rate (HR) recovery after exercise reflects the balance ...
Buendía Fuentes F - - 2010
Heart transplant recipients show an abnormal heart rate (HR) response to exercise due to complete cardiac denervation after surgery. They present elevated resting HR, minimal increase in HR during exercise, with maximal HR reached during the recovery period. The objective of this study was to study the frequency of normalization ...
Inklebarger J - - 2010
There are several reports concerning exercise and rabdomyolysis. There has been no report in the English literature of exercise induced rabdomyolisis from a stationary bike.A 63-year-old female recreational athlete presented to our hospital seeking treatment for lower back, leg pain and stiffness after exercising on a stationary bicycle one day ...
Kim James A JA Cardiology Division, Department of Medicine, University of Rochester Medical Center, Rochester, New York, - - 2010
Cardiac events in patients with long QT syndrome type 2 (LQT2) are predominately associated with sudden arousal. However, exercise-induced events also occur in this population. The purpose of this study was to test the hypothesis that risk factors show a trigger-specific association with cardiac events in LQT2 patients. The study ...
Burkhardt Barbara E U - - 2011
To test the hypothesis that excessive postural tachycardia is associated with deconditioning rather than merely being an independent sign of autonomic dysfunction in patients with postural orthostatic tachycardia syndrome (POTS). We retrospectively analyzed records from 202 adolescents who underwent both head up-tilt and maximal exercise testing. Patients were classified as ...
Dörr Marcus - - 2010
Impaired heart rate (HR) response to exercise is associated with increased cardiovascular morbidity and mortality. We analyzed whether common variants (rs5443/C825T and rs5442/G814A) in the G-protein β3 subunit (GNB3) gene modulate interindividual variation in β-blocker responses with respect to HR. Among 1614 subjects (347 current β-blocker users) of a population-based ...
Wang Ching-Yi - - 2011
Aim:  To examine the effect of regular ongoing exercise lifestyle on mental and physical health in a group of independent community-dwelling Taiwanese older adults over a 2-year period. Methods:  197 older adults (mean age 72.5 years; 106 men and 91 women) who were independent in walking, instrumental and basic activities ...
Wehrwein Erica A EA Department of Anesthesia Research, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, - - 2011
We studied patients with palmar hyperhidrosis before and after endoscopic thoracic sympathotomy (ETS) to determine the effect of chronic sympathetic denervation on (1) forearm blood flow (FBF) response to mental stress and (2) exercise tolerance. Twenty-two healthy patients were evaluated before ETS, and 17 returned after surgery (11 F; 19-32 years). ...
Pasiakos Stefan M - - 2010
This study examined alterations in skeletal-muscle growth and atrophy-related molecular events after a single bout of moderate-intensity endurance exercise. Muscle biopsies were obtained from 10 men (23 ± 1 yr, body mass 80 ± 2 kg, and VO(2peak) 45 ± 1 ml x kg⁻¹ x min⁻¹) immediately (0 hr) and ...
Ho John S - - 2010
BACKGROUND: Abnormal non-ST segment treadmill parameters are associated with an increased mortality risk. Such measures include fitness, resting heart rate (HR), chronotropic incompetence, and HR recovery. However, whether there is an additive association among these parameters and the risk of mortality is unknown. DESIGN: Prospective observational registry study. METHODS: We ...
Ricardo Djalma R - - 2010
It is not known whether subjects that have higher cardiac vagal reactivation (CVR) during repeated exercise transitions also have higher cardiac vagal withdrawal (CVW) at the onset of exercise, which would lead to better heart rate (HR) regulation during exercise transitions. Therefore, our aims were to investigate: (a) the influence ...
Oliveira Samantha M L - - 2010
The aim of this study was to analyze the physiological responses to a tap dance choreography and to compare with those observed during a maximal treadmill exercise test, in tap dancers. Eight women (19.6 +/- 2.4 years; 162.3 +/- 4.4 cm; 54.0 +/- 2.3 kg; 20.5 +/- 1.4 kg.m; and ...
Trinity Joel D - - 2010
People who become hyperthermic during exercise display large increases in heart rate (HR) and reductions in stroke volume (SV). It is not clear if the reduction in SV is due primarily to hyperthermia or if it is a secondary effect of an elevation in HR reducing ventricular filling. In the ...
Gulati Martha - - 2010
The definition of a normal heart rate (HR) response to exercise stress testing in women is poorly understood, given that most studies describing a normative response were predominately based on male data. Measures of an attenuated HR response (chronotropic incompetence) and age-predicted HR have not been validated in asymptomatic women. ...
Stergiopoulos Kathleen - - 2010
Although emerging data support the utility of real-time three-dimensional echocardiography (RT3DE) during dobutamine stress testing, the feasibility of performing contrast enhanced RT3DE during exercise treadmill stress has not been explored. Two-dimensional (2D) and three-dimensional (3D) acquisition were performed in 39 patients at rest and peak exercise. Contrast was used in ...
Mody Bhavesh Surendra - - 2011
With the recent rise in obesity awareness and the increased understanding of the importance of physical activity in promoting overall health, greater emphasis has been placed on improving physical fitness to enhance quality of life. Surya Namaskar, a component of Hatha Yoga, has been practiced by Asian Indians for hundreds ...
Pinto G S M - - 2010
Little is known about the physiological response during slideboard exercise (SE). The aim of the present study was to analyse the oxygen uptake (V.O2), the heart rate (HR) and the energy expenditure (EE) during a typical slideboard exercise session and investigate differences on these variables when performing the same choreography ...
Cochrane D J - - 2010
The aim of this study was to investigate the influence of shallow dynamic squatting (DS) versus static squatting (SS) with or without concurrent side-to-side alternating whole-body vibration (WBV) on vastus lateralis temperature and cardiovascular stress as indicated by heart rate (HR). Ten participants (five men, five women) participated in four ...
Rapisura Krystle P - - 2010
Although mouthguards have been found to reduce injury, many athletes choose not to use them because of the belief of negative effects on breathing with mouthguard use. Therefore, this study investigated the effects of mouthguard use on physiological variables in women using a self-adapted mouthguard made for women and a ...
Morris Michael - - 2010
The purpose of this study was to determine for the first time whether VO2max could be predicted accurately and reliably from a treadmill-based perceptually regulated exercise test (PRET) incorporating a safer and more practical upper limit of RPE 15 ("Hard") than used in previous investigations. Eighteen volunteers (21.7 +/- 2.8 ...
Hai Jo-Jo - - 2010
Heart rate recovery (HRR) at predischarge exercise stress test predicts all-cause mortality in patients with myocardial infarction (MI), but the relationship between improvement in HRR with exercise training and clinical outcomes remains unclear. The purpose of this study was to evaluate the effect of change in HRR after exercise training ...
Buchheit Martin - - 2010
Measurements of exercise heart rate (HR(ex)), HR recovery (HRR) and HR variability (HRV) are used as indices of training status. However, the day-to-day variability of these indices throughout a competitive soccer period is unknown. On 14 occasions during a 3-week competition camp, 18 under 15 (U15) and 15 under 17 ...
Raffaelli C - - 2010
The aims of this study were: (i) to measure the exercise intensity (EI) of the most common water-based exercises (WE) at different movement frequencies (f1 = 1.8-2.0 Hz; f2 = 2.0-2.2 Hz; f3 = 2.2-2.4 Hz) and at a standardize movement's amplitude; (ii) to measure EI during a combination (MIX) ...
Millar Philip J - - 2010
INTRODUCTION: Analysis of nonlinear heart rate (HR) dynamics may provide greater insight into neurocardiac influences during exercise and disease than traditional HR variability. However, the physiological basis of nonlinear HR dynamics has not been investigated in individuals with spinal cord injury (SCI). The purpose of this study was to compare ...
Turner Michael J - - 2010
To determine differences in physiologic responses and perceived discomfort during maximal and submaximal exercise with 2 common exercise modalities, the elliptical cross-trainer (ECT) and the arc trainer (ARC) were used, which undergoes an excursion of motion using an arc pathway. Eighteen subjects (10 male and 8 female; age = 24.7 ...
Tordi Nicolas - - 2010
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 +/- ...
Reibis Rona K - - 2010
BACKGROUND: There are few data about predictors of cardiovascular mortality and rehospitalization rate in patients with left ventricular systolic dysfunction (LVSD) after myocardial revascularization and optimization of pharmacological treatment. PATIENTS AND METHODS: 1,346 consecutive patients with left ventricular ejection fraction (LVEF) < 45% (64 + or - 10 years, 73% ...
Goosey-Tolfrey Victoria - - 2010
PURPOSE: To examine the validity of perception-based intensity regulation during handcycling exercise. METHODS: Eight spinal cord-injured (T11 incomplete to T4 complete) participants completed an incremental exercise test followed by a (.)VO2peak test using a sports hand bike. Subsequently, two 20-min exercise tests were completed at an individualized power output (PO) ...
Wang S C - - 2010
This study evaluated the reliability and validity of a proposed 10 min running speed variance test (RSVHRC) in assessing aerobic power at which the intensity was controlled at 80% of age-predicted maximal heart rate (HR). Forty-four college students (21 men and 23 women, age: 21+/-3 years, height: 166.6+/-7.9 cm, weight: ...
Nishiyama Yasuhiro - - 2010
It is well known that peak oxygen consumption and heart rate (HR) recovery after exercise obtained from the cardiopulmonary exercise test are prognostic parameters in patients with chronic heart failure (CHF). However, it is unclear whether exercise-induced parameters obtained from the routine exercise stress test predict mortality in patients with ...
Nieminen Tuomo - - 2010
A prolonged electrocardiographic PR interval at rest has been considered a benign phenomenon until recently. We hypothesized that measurement of the PR interval during recovery from physical exertion could improve cardiovascular mortality risk stratification because it would track the dynamic influences of homeostatic mechanisms controlling atrioventricular (AV) conduction. A total ...
Wakasugi Rie - - 2010
Heart rate (HR) during exercise is controlled by cardiac sympathetic (CSNA) and vagal (CVNA) efferent nerve activity and plasma catecholamines. To determine their relative contribution to the exercise tachycardia, we examined the effects of adrenalectomy (ADX) and autonomic blockades on the HR response during treadmill exercise for 32min in 13 ...
Coca Aitor - - 2010
We evaluated the accuracy of a wearable sensor vest for real-time monitoring of physiological responses to treadmill exercise. Ten subjects in standard firefighter ensembles, treadmill exercising at 50% VO(2) max, had heart rate (HR), respiratory rate (RR), skin temperature (T(sk)), oxygen saturation (SaO(2)), tidal volume (V(T)), and minute ventilation (V(E)) ...
LaRoche Dain P - - 2010
The purpose of this study was to examine the effects of level vs. graded skate skiing on capillary blood lactate (B(La)), heart rate (HR), oxygen consumption (V(O2)), and training intensity prescriptions. Eleven Nordic skiers completed 2 submaximal skate roller skiing treadmill protocols during which intensity was increased either by grade ...
Kaplinsky Edgardo - - 2010
BACKGROUND: Inappropriate sinus tachycardia (IST) is an uncommon disorder characterized by an exaggerated heart rate (HR). It is mostly treated with b-blockers or verapamil leaving the sinus node modulation for refractory cases. Ivabradine, a pure HR lowering agent, has proven anti-anginal efficiency linked to the If current inhibition. We conducted ...
Bloomer Richard J - - 2010
In the present investigation we compared blood epinephrine (EPI), norepinephrine (NE), free fatty acids (FFA) and glycerol concentrations in response to a capsaicinoid supplement or placebo in healthy adults before and after acute exercise. Twenty subjects ingested a placebo or supplement (Capsimax, OmniActive Health Technologies; 2 mg capsaicinoids in a ...
Leddy John J - - 2010
To evaluate the safety and effectiveness of subsymptom threshold exercise training for the treatment of post-concussion syndrome (PCS). Prospective case series. University Sports Medicine Concussion Clinic. Twelve refractory patients with PCS (6 athletes and 6 nonathletes). Treadmill test to symptom exacerbation threshold (ST) before and after 2 to 3 weeks ...
Gorbet Nathaniel - - 2010
Dysfunction of the transverse abdominis (TrA) has been associated with LBP. Several therapeutic exercises are prescribed to help target the TrA. Rehabilitative ultrasound imaging (RUSI) is used to capture activation of the TrA during exercise. The purpose was to examine TrA activation during the ADIM and quadruped exercises between healthy ...
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