Search Results
Results 201 - 250 of 387
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Song Young Kyu - - 2010
This study was conducted to determine whether job demand played a role as a risk factor of cardiovascular diseases by comparing changes of blood pressure, heart rate and rate pressure product (RPP) showing myocardial oxygen consumption (MVO2) according to levels of job demand. This cross-sectional study divided 177 male white-collar ...
Bocalini Danilo Sales - - 2010
To evaluate the effects of short-term exercise detraining on the functional fitness of older women after a 12-week water-based exercise (WE) program. Healthy older women (trained (TR) group) were submitted to 12 weeks WE (three 45 min sessions per week) followed by a 6-week detraining period. A group of aged-matched ...
Shen Chwan-Li - - 2010
Evidence suggests that both green tea polyphenols (GTP) and Tai Chi (TC) exercise may benefit bone health in osteopenic women. However, their safety in this population has never been systematically investigated. In particular, there have been hepatotoxicity concerns related to green tea extract. This study was to evaluate the safety ...
Flues Karin - - 2010
Menopause is recognized as a period of increased risk for coronary heart disease. Although the benefits of exercise training in lowering cardiovascular risk factors are well established, the risks and benefits of hormone therapy have been questioned. The purpose of the present study was to investigate the effects of estrogen ...
Woods Jeffrey A - - 2009
OBJECTIVES: To determine whether cardiovascular exercise training resulted in improved antibody responses to influenza vaccination in sedentary elderly people who exhibited poor vaccine responses. DESIGN: Single-site randomized parallel-arm 10-month controlled trial. SETTING: University of Illinois at Urbana-Champaign. PARTICIPANTS: One hundred forty-four sedentary, healthy older (69.9 +/- 0.4) adults. INTERVENTIONS: Moderate ...
Tipton Charles M - - 2009
In 2005, the American Physiological Society (APS) initiated the Living History of Physiology Archival Program to recognize senior members who have made significant contributions during their career to the advancement of the discipline and the profession of physiology. Subsequently, the leadership of the APS Section of Environmental and Exercise Physiology ...
Crestani Carlos C - - 2010
Dynamic exercise evokes sustained cardiovascular changes, which are characterized by blood pressure and heart rate (HR) increases. Although it is well accepted that there is a central nervous system (CNS) mediation of cardiovascular adjustments during dynamic exercise, information on the role of specific CNS structures is limited. The bed nucleus ...
Michelini Lisete C - - 2009
It is now well established that brain plasticity is an inherent property not only of the developing but also of the adult brain. Numerous beneficial effects of exercise, including improved memory, cognitive function and neuroprotection, have been shown to involve an important neuroplastic component. However, whether major adaptive cardiovascular adjustments ...
Pagani Massimo - - 2009
This brief review summarizes current knowledge on the neural mechanisms of cardiovascular regulation during exercise in space, with specific emphasis on the role of the arterial baroreflex and the muscle metaboreflex, with the attendant modifications in autonomic nervous system activity, in determining the cardiovascular responses to exercise in microgravity conditions. ...
Stütz Adrian M - - 2009
The sodium bicarbonate cotransporter gene SLC4A5, associated earlier with cardiovascular phenotypes, was tested for associations in the HERITAGE Family Study, and possible mechanisms were investigated. Twelve tag-single nucleotide polymorphisms (SNPs) covering the SLC4A5 gene were analyzed in 276 Black and 503 White healthy, sedentary subjects. Associations were tested using a ...
Hazel E M - - 2009
The aim of this study is to examine the exercise capacity in women with systemic lupus erythematosus (SLE). Women with SLE underwent exercise testing; their performance was compared to nomogram predictions. We assessed the potential effects of disease activity and cumulative damage on exercise capacity. We evaluated 52 female SLE ...
McKenzie Jack E - - 2009
This paper details the combination of heart rate, core body temperature, and actigraphy in an ambient daily living environment to enhance the understanding of the overall physiology of the human body. Such research represents a new advancement in the area of physiological measurements. Measurement of a single physiological variant only ...
Galvão D A - - 2009
Apart from the well-established adverse musculoskeletal and sexual health effects of androgen deprivation therapy (ADT), evidence is accumulating of substantial ADT-related cardiovascular and metabolic complications, which may impact quality of life and overall survival. In this brief review we discuss (1) the incidence of cardiovascular and metabolic complications during/following ADT ...
Ciesielska Izabela - - 2009
OBJECTIVES: The aim of the experiment was to analyze the influence that the clothing material may have on human physiology and thermal comfort both at rest and physical effort to answer the question which fabric is better, a natural or a synthetic one. MATERIALS AND METHODS: We measured some psychomotor ...
Wichi Rog?rio Brand?o - - 2009
The aging process is associated with alterations in the cardiovascular and autonomic nervous systems. Autonomic changes related to aging involve parasympathetic and sympathetic alterations leading to a higher incidence of cardiovascular disease morbidity and mortality. Several studies have suggested that physical exercise is effective in preventing deleterious changes. Chronic exercise ...
Minkkinen Mikko - - 2009
INTRODUCTION: We examined whether quantification of T-wave alternans (TWA) enhances this parameter's capacity to evaluate the risk for total and cardiovascular mortality and sudden cardiac death (SCD). METHODS AND RESULTS: The Finnish Cardiovascular Study (FINCAVAS) enrolled consecutive patients (n = 2,119; 1,342 men and 777 women) with a clinically indicated ...
Donnikov A E - - 2008
The main parameters of humoral immunity during medium intensity exercise were studied in oarsmen with high and low cardiovascular adaptation. A relationship between high cardiovascular adaptation to exercise and immune response polarization by the Th2 mechanism was demonstrated. Increased production of IL-10 in response to physical stress plays a key ...
Green Alexander L - - 2008
The neurocircuitry underlying human cardiovascular control during exercise has yet to be fully elucidated. Functional imaging studies and animal studies have so far identified potential circuits that might be involved in the cardiovascular response to exercise, so-called 'central command'. This brief review highlights neurocircuits that may have functional significance as ...
Tipton Charles M - - 2008
In 2005, the American Physiological Society (APS) initiated the Living History Project to recognize senior members who have made significant contributions during their career to the advancement of the discipline and profession of physiology. During 2007, the APS Section of Environmental and Exercise Physiology selected Prof. G. Edgar Folk, Jr., ...
Bourque Charles W - - 2008
Systemic osmoregulation is a vital process whereby changes in plasma osmolality, detected by osmoreceptors, modulate ingestive behaviour, sympathetic outflow and renal function to stabilize the tonicity and volume of the extracellular fluid. Furthermore, changes in the central processing of osmosensory signals are likely to affect the hydro-mineral balance and other ...
Huang Sheng-Tung - - 2008
We synthesized a new long-wavelength latent fluorimetric probe BCC (6) to detect physiologically significant thiols. The fluorogenic chemical transformation of BCC triggered by thiols is through a tandem reaction, thiol-induced benzoquinone reduction, and quinone-methide-type rearrangement reaction, which are spontaneous and irreversible at physiological temperature in aqueous media. The fluorescence signal ...
Snyder Eric M - - 2008
Exercise elicits a number of physiologic responses to increase oxygen delivery to working muscles. The beta2-adrenergic receptors (ADRB2) play a role in the cardiopulmonary response to exercise. This review is focused on how the gene that encodes the ADRB2 influences the cardiopulmonary response to exercise. In addition, we discuss possible ...
Bergovec Marko - - 2008
The literature contains limited and contradictory information regarding the amount of physical effort and/or emotional stress needed to perform surgery. We therefore investigated cardiovascular response to psychophysical stress in orthopaedic surgeons while they were performing surgery. We monitored 29 male orthopaedic surgeons from four university centers while they performed total ...
Pritchard Laurel M - - 2008
In this paper we describe a lab exercise developed for the Introduction to Neuroscience course at Williams College. One of a series of five labs, this exercise demonstrated several key principles of behavioral neuroscience. In this lab, students explored the effects of post-weaning housing environment on anxiety-like behavior and psychostimulant ...
Wahl Patrick - - 2008
A number of publications have provided evidence that exercise and physical activity are linked to the activation, mobilization, and differentiation of various types of stem cells. Exercise may improve organ regeneration and function. This review summarizes mechanisms by which exercise contributes to stem cell-induced regeneration in the cardiovascular and the ...
McGuigan Michael R MR School of Exercise, Biomedical and Health Sciences, Edith Cowan University , Joondalup, WA, - - 2008
Previous research has demonstrated the importance of both dynamic and isometric maximal strength and rate of force development (RFD) in athletic populations. The purpose of this study was to examine the relationships between measures of isometric force (PF), RFD, jump performance and strength in collegiate football athletes. The subjects in ...
Yoshino Kohzoh - - 2007
After collecting data on the cardiovascular responses to ramp-type exercise tests on a cycle ergometer from 194 healthy male and female subjects aged from 20 to 69 years, we constructed a mathematical model that simulates typical patterns of the cardiovascular variability responses to ramp-type exercise loads below the anaerobic threshold. ...
Majeed Farhan - - 2007
Aerobic exercise is associated with a number of beneficial effects, including reduction in cardiovascular morbidity and mortality, decreased blood pressure, improved insulin sensitivity, weight loss and favorable alterations in lipids. However, intense exercise may have significant deleterious cardiovascular effects. Excessive physical activity may cause increased oxidative stress with resultant endothelial ...
Ally Ahmmed - - 2007
Nitric oxide (NO) is synthesized from L-arginine through the activity of the enzyme, NO synthase (NOS). Previous studies have demonstrated the role of the 3 isoforms of NOS, namely endothelial NOS (eNOS), neuronal NOS (nNOS), and inducible NOS (iNOS) in cardiovascular regulation. Local blockade of nNOS in RVLM vs. CVLM ...
Inlow Jennifer K - - 2007
We describe two bioinformatics exercises intended for use in a computer laboratory setting in an upper-level undergraduate biochemistry course. To introduce students to bioinformatics, the exercises incorporate several commonly used bioinformatics tools, including BLAST, that are freely available online. The exercises build upon the students' background knowledge of hemoglobin and ...
Karlsson Gudbjorn A - - 2007
Nitric oxide (NO) within the dorsal periaqueductal gray matter (dPAG) attenuated cardiovascular responses and changes in the concentrations of glutamate during both mechanical and thermal nociceptive stimulation [Ishide, T., Amer, A., Maher, T.J., Ally, A., 2005. Nitric oxide within periaqueductal gray modulates glutamatergic neurotransmission and cardiovascular responses during mechanical and ...
Wang Lu - - 2007
A mathematical model, based on our previous pulsatile nonlinear multi-element cardiovascular model, was tested and improved to study cardiovascular response under graded exercise levels. Ten healthy subjects were studied using cycle-ergometry exercise test with constant workloads ranging from 25 Watt to 125 Watt. Breath by breath gas exchange, heart rate, ...
Matthews Robert - - 2007
This paper describes an integrated Physiological Sensor Suite (PSS) based upon QUASAR's innovative non-invasive bioelectric sensor technologies that will provide, for the first time, a fully integrated, noninvasive methodology for physiological sensing. The PSS currently under development at QUASAR is a state-of-the-art multimodal array of sensors that, along with an ...
Steinbeis Nikolaus - - 2006
The purpose of the present study was to investigate the effect of harmonic expectancy violations on emotions. Subjective response measures for tension and emotionality, as well as electrodermal activity (EDA) and heart rate (HR), were recorded from 24 subjects (12 musicians and 12 nonmusicians) to observe the effect of expectancy ...
West John B - - 2006
Georges Dreyer was the first Professor of Pathology at Oxford University and he held this post from 1907 to 1934. Although his main research interests were in bacteriology and immunity, he made important contributions to respiratory physiology, but these have been almost completely forgotten. He developed a new apparatus for ...
Dempsey Jerome A - - 2006
Some of the major unresolved questions in the respiratory physiology and pathophysiology of exercise are addressed. To solve many of these difficult basic problems and to understand how systems operate alone and in combination in an integrated fashion, truly experimental integrative physiological approaches are required in both humans and animals.
Cooke S J - - 2006
Animal populations exhibit wide ranges of divergence associated with both geographic and genetic distances. Here, we examined the role of crossing distance on the cardiovascular response to exhaustive exercise among differentiated stocks of largemouth bass Micropterus salmoides at 10 degrees C and 20 degrees C. Stocks of 2+ fish were ...
Berry, Narelle Margaret
This thesis comprises of four experiments from which related but independent analyses were undertaken. The interventions employed were designed to investigate the effect of cardiovascular adaptation, both in the short and long term on the cardiovascular responses to orthostatic stress. The first study, described in Chapter 3, tested the hypothesis ...
Schwartzenberg Shmuel - - 2006
The glycoprotein erythropoietin was originally discovered as a principal regulator that promotes the survival, proliferation and differentiation of erythroid progenitor cells. Despite potentially detrimental effects, such as increased blood pressure and hyperviscosity, recombinant human erythropoietin has been demonstrated to be a safe drug, as millions of anemia sufferers have received ...
Nieminen Tuomo - - 2006
The purpose of the Finnish Cardiovascular Study (FINCAVAS) is to construct a risk profile--using genetic, haemodynamic and electrocardiographic (ECG) markers--of individuals at high risk of cardiovascular diseases, events and deaths. All patients scheduled for an exercise stress test at Tampere University Hospital and willing to participate have been and will ...
McGuigan Michael R MR School of Exercise, Biomedical and Health Sciences, Edith Cowan University , Joondalup, WA, - - 2006
Previous research has demonstrated the importance of isometric maximal strength (PF) and rate of force development (RFD) in a variety of athletic populations including track cyclists and track and field athletes. Among coaches and sports scientists there is a lack of agreement regarding how much strength is required for optimal ...
Carey Daniel G DG Health and Human - - 2005
The anaerobic threshold (AT) has been defined as the theoretical highest exercise level that can be maintained for prolonged periods. It is of practical importance to the competitive endurance athlete to measure progress and plan training programs. The primary objective of this study was to assess the reliability and validity ...
Smith Scott A - - 2006
The exercise pressor reflex (a peripheral neural reflex originating in skeletal muscle) contributes significantly to the regulation of the cardiovascular system during exercise. Exercise-induced signals that comprise the afferent arm of the reflex are generated by activation of mechanically (muscle mechanoreflex) and chemically sensitive (muscle metaboreflex) skeletal muscle receptors. Activation ...
Williamson J W - - 2006
The autonomic adjustments to exercise are mediated by central signals from the higher brain (central command) and by a peripheral reflex arising from working skeletal muscle (exercise pressor reflex), with further modulation provided by the arterial baroreflex. Although it is clear that central command, the exercise pressor reflex and the ...
Tassorelli Cristina - - 2005
In this study, we compare the biological effects, Fos expression and cardiovascular responses induced in the rat, of different nitric oxide modulators (nitroglycerin, sodium nitroprusside and L-arginine). Nitroglycerin and sodium nitroprusside induced a similar pattern of neuronal activation in several areas, which include the paraventricular and supraoptic nuclei of the ...
Hamill Joseph - - 2005
The purpose of this paper is to review the biomechanics and exercise physiology studies published in the Research Quarterly for Exercise and Sport (RQES) over the past 75 years. Studies in biomechanics, a relatively new subdiscipline that evolved from kinesiology, first appeared in the journal about 40 years ago. Exercise ...
Peng Xuyang - - 2005
Anthracyclines remain a mainstay of chemotherapy in spite of their well-recognized cardiotoxicity. Recent experience with trastuzumab (Herceptin) and anthracycline therapy has prompted a detailed analysis of the function of erbB2 in the heart. These studies demonstrate a cardioprotective effect of neuregulin, the endogenous ligand for the erbB4/erbB2 heterodimeric receptor complex. ...
St Clair Gibson A - - 2005
Using a number of different homeostatic control mechanisms in the brain and peripheral physiological systems, metabolic activity is continuously regulated at rest and during exercise to prevent catastrophic system failure. Essential for the function of these regulatory processes are baseline "setpoint" levels of metabolic function, which can be used to ...
da Nobrega Antonio Claudio Lucas - - 2005
Physical exercise represents a physiological stress to the organism producing acute integrative physiological adjustments, whereas repetitive and regular sessions of physical effort provoke chronic physiological adaptations that develop throughout the weeks of training and increase exercise capacity. The present work presents and discusses the concept of subacute effects of exercise, ...
Magal Meir - - 2005
Ratings of perceived exertion (RPE) are used for exercise programming of cardiac rehabilitation patients, whenever it is difficult to use heart rate to set intensity due to medication or other factors. This investigation examined the physiological responses to two stepping exercise modes (upright and recumbent) at the same RPE. Analysis ...
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