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Hess, Tanja Maria
Effects of potassium supplementation were evaluated in four studies in endurance horses during races and treadmill exercise. In the first and second studies a potassium-free experimental formula was compared to potassium rich commercial formulas. The first study showed that supplementation increased plasma [K+], and that the extra sodium in the ...
Wade C E - - 2005
Spaceflight and prolonged bed rest (BR) alter plasma hormone levels inconsistently. This may be due, in part, to prescription of heavy exercise as a countermeasure for ameliorating the adverse effects of disuse. The initial project was to assess exercise programs to maintain aerobic performance and leg strength during BR. The ...
Raekallio Marja R - - 2005
OBJECTIVE: To compare the effects of pretreatment with dexamethasone, physical stress (exercise), or both on sedation and plasma hormone and glucose concentrations in dogs treated with dexmedetomidine (DEX). ANIMALS: 6 healthy purpose-bred Beagles. PROCEDURE: Dogs received 4 treatments each in a randomized order prior to i.v. administration of DEX (5 ...
Bracken Richard M - - 2005
PURPOSE: The aims of this study were to examine the plasma dopamine response to a controlled bout of short-duration high-intensity exercise and investigate the magnitude of the plasma dopamine (DA), norepinephrine (NE), and epinephrine (EPI) responses to this exercise after induced alkalosis. METHODS: Eight male subjects were given in randomized ...
Kargotich Stephen - - 2005
The aim of this study was to establish the pattern and time course of plasma glutamine recovery after acute, high-intensity exercise in well-trained swimmers. In Study 1, elite male swimmers (n=8) performed 15 x 100 m swimming intervals (ITS) at 70% and 95% of maximal 100m freestyle time. Resting plasma ...
Weschler Louise B - - 2005
In 1958, Edelman and colleagues empirically showed plasma sodium concentration ([Na+]p) to be primarily a function of the sum of exchangeable sodium and potassium (E) divided by total body water (TBW). Based on Edelman's equation, Nguyen and Kurtz derived an equation to show how [Na+]p changes as a function of ...
- - 2005
The objective of this health technology policy analysis was to determine, where, how, and when physiotherapy services are best delivered to optimize functional outcomes for patients after they undergo primary (first-time) total hip replacement or total knee replacement, and to determine the Ontario-specific economic impact of the best delivery strategy. ...
Jacobs Kevin A - - 2005
We evaluated the hypothesis that fatty acid reesterification would be increased during rest and exercise in the midluteal menstrual cycle phase and during oral contraceptive use, when ovarian hormone concentrations are high, compared with the early follicular phase. Subjects were eight moderately active, weight-stable, eumenorrheic women (24.8 +/- 1.2 yr, ...
Vicart S - - 2004
BACKGROUND: Periodic paralysis is classified into hypokalemic (hypoPP) and hyperkalemic (hyperPP) periodic paralysis according to variations of blood potassium levels during attacks. OBJECTIVE: To describe new mutations in the muscle sodium channel gene SCN4A that cause periodic paralysis. METHODS: A thorough clinical, electrophysiologic, and molecular study was performed of four ...
Romero Sonia Maria Brazil - - 2004
Resting plasma epinephrine (E) and norepinephrine (N) concentrations for intact toads (Bufo paracnemis) were 5.57+/-1.0 and 0.88+/-0.38 ng/ml, respectively. Exercise induced a significant increase in heart rate, blood pressure and plasma epinephrine (about 4.3 times), whereas norepinephrine remained unchanged. The resting [E]/[N] ratio was 6.3 and increased to 32.9 during ...
Jürimäe Jaak - - 2005
The purpose of present study was to investigate plasma adiponectin response to acute exercise in highly trained male rowers. Ten rowers performed a maximal 6,000-m rowing ergometer test [mean performance time approximately 20 min; 1,200.8 (29.9) s], and venous blood samples were obtained before, immediately after and after 30 min ...
Brown Malcolm - - 2004
OBJECTIVE: We aimed to determine the pharmacokinetics (PK) of N-acetylcysteine (NAC) at rest and during exercise when given by continuous intravenous infusion intended to maintain relatively constant plasma concentrations. METHODS: Plasma concentrations of NAC were measured in 24 healthy male subjects during and after a two-stage intravenous infusion designed to ...
Schenk Simon - - 2005
High plasma fatty acid availability and a positive energy balance in sedentary individuals reduce insulin sensitivity. This study's purpose was to determine whether high plasma fatty acid availability and systemic caloric excess after exercise also impair insulin sensitivity. On two separate occasions, seven nonobese women performed 90 min of exercise ...
Waters Wendy W - - 2005
Head-down bed rest changes the values of many cardiovascular and endocrine variables and also elicits significant hypovolemia. Because previous studies had not controlled for hypovolemia, it is unknown whether the reported changes were primary effects of bed rest or secondary effects of bed rest-induced hypovolemia. We hypothesized that restoring plasma ...
Miller Benjamin F - - 2005
An emerging technique used for the study of metabolic regulation is the elevation of lactate concentration with a sodium-lactate infusion, the lactate clamp (LC). However, hematological and acid-base properties affected by the infusion of hypertonic solutions containing the osmotically active strong ions sodium (Na(+)) and lactate (Lac(-)) are a concern ...
Walsh Neil P - - 2004
PURPOSE: Firstly, to identify whether saliva flow rate, osmolality, and total protein are potential markers of hydration, we compared changes in these parameters with changes in plasma osmolality during progressive dehydration. Secondly, we compared the sensitivity of saliva parameters to track hydration changes with the sensitivity of urine osmolality. Thirdly, ...
Holte Kathrine - - 2004
PURPOSE: Despite the universal use of bowel preparation before colonoscopy and colorectal surgery, the physiologic effects have not been described in a standardized setting. This study was designed to investigate the physiologic effects of bowel preparation. METHODS: In a prospective study, 12 healthy volunteers (median age, 63 years) underwent bowel ...
Meludu, S. C.
Anaerobic exercise, a non 02 – dependent energy metabolism leads to transient metabolic changes, which are corrected gradually by homestatic mechanism. We investigated in eight male subjects, the effects of anaerobic exercise after a day sedentary activity on serum mineral concentration. There was significant variation in the concentration of serum ...
Raila J - - 2004
Fasting dogs do transport vitamin A (VA) in plasma not only as retinol but predominantly as retinyl esters. Contrary to retinol, nothing is known concerning the effects of athletic performance on plasma retinyl ester concentrations. The aim of this study was therefore to examine whether physical stress because of exercise ...
S.C. MELUDU, M.NISHIMUTA, Y. ...
Anaerobic exercise, a non 02 - dependent energy metabolism leads to transient metabolic changes, which are corrected gradually by homestatic mechanism. We investigated in eight male subjects, the effects of anaerobic exercise after a day sedentary activity on serum mineral concentration. There was significant variation in the concentration of serum ...
D'Andrea G - - 2004
BACKGROUND: Trace amines, including tyramine, octopamine, and synephrine, are closely related to classic biogenic amines. They have been hypothesized to promote migraines and other types of primary headaches, but there is no direct evidence supporting this hypothesis. METHODS: Using a multichannel electrochemical high-performance liquid chromatography system, the authors evaluated whether ...
Petibois Cyril - - 2004
For determining exercise-induced changes in plasma molecular species, we investigated the feasibility of using two-dimensional correlation spectra (2D-COS) on 21 series of plasma samples obtained from progressive exercise tests. Intensities of 2D synchronous and asynchronous correlation peaks were compared to concentration evolutions of glucose, lactate, triglycerides (TG), glycerol, fatty acyl ...
Holmes Anna G - - 2004
IL-6 induces lipolysis when administered to humans. Consequently, it has been hypothesized that IL-6 is released from skeletal muscle during exercise to act in a "hormonelike" manner and increase lipolysis from adipose tissue to supply the muscle with substrate. In the present study, we hypothesized that suppressing lipolysis, and subsequent ...
Contini M - - 2004
BACKGROUND: It is well documented that exercise reduces the risk of thromboembolic disease, possibly by increasing the plasma concentration of anticoagulant-antithrombotic compounds. OBJECTIVES: As plasma glycosaminoglycans (GAGs) play a role in the anticoagulant-antithrombotic potential of plasma, to examine the concentration and profile of these compounds in well trained, long distance ...
Imamura H - - 2004
AIM: The purpose of this study was to examine the effects of moderate exercise on the magnitude and duration of excess post-exercise oxygen consumption (EPOC) and catecholamine concentrations in 7 young women. METHODS: The subjects performed 30 or 60 minutes of exercise (30-ME and 60-ME, respectively) on separate days at ...
Vobejda C - - 2004
AIM: The purpose of this study was to verify the hypothesis that the postexercise increase (PEI) of plasma free fatty acid (FFA) concentrations after cessation of exercise is a suitable qualitative indicator for the FFA utilisation during the foregoing exercise. METHODS: Fourteen, 17 and 23 healthy subjects participated in 3 ...
Watt Matthew J - - 2004
Intramuscular triacylglycerols (IMTG) are proposed to be an important metabolic substrate for contracting muscle, although this remains controversial. To test the hypothesis that reduced plasma free fatty acid (FFA) availability would increase IMTG degradation during exercise, seven active men cycled for 180 min at 60% peak pulmonary O(2) uptake either ...
Gu Jian-Wei - - 2004
Physical inactivity increases the risk of atherosclerosis. However, the molecular mechanisms of this relation are poorly understood. A recent report indicates that endostatin, an endogenous angiostatic factor, inhibits the progression of atherosclerosis, and suggests that reducing intimal and atherosclerotic plaque tissue neovascularization can inhibit the progression atherosclerosis in animal models. ...
Bonifazi Marco - - 2004
The aim of the present study was to evaluate the effect of an exhaustive exercise on platelet adhesion and aggregation on polyethylene (PE) in relation to changes in plasma cortisol concentration in order to ascertain the effect of physical stress response in the blood-contacting properties of polymeric materials. Twelve healthy ...
Moussa E - - 2003
AIM: We have explored in the following study the glucoregulatory responses (glycemia, insulinemia, catecholamines) at the end of 2 supramaximal tests of different durations. METHODS: Seven untrained male subjects (21.9+/-0.3 y) performed an isolated exercise of 6 s (T6) and a Wingate-test of 30 s. To determine the levels of ...
Elfatih Abubaker - - 2003
BACKGROUND: Nitric oxide (NO) plays a pivotal role in the pathophysiology of coronary heart disease (CHD). Low plasma concentrations of NO metabolites (nitrite and nitrate), the stable oxidation products of NO have been reported in patients with CHD but this is controversial. Plasma nitrite and nitrate concentrations during symptomatic myocardial ...
Jacob Christophe - - 2004
In this study we investigated whether plasma catecholamine responses to the Wingate test are affected by the intensity of training in endurance-trained subjects. To do this we compared plasma adrenaline (A) and noradrenaline (NA) concentrations in response to a Wingate test in three different groups: specialist middle-distance runners (MDR) in ...
Rodriguez M Christine - - 2003
Exercise and ischemia-reperfusion (I-R) have previously been shown to induce oxidative stress in skeletal muscle. Previous studies have demonstrated conflicting results when exercise-induced oxidative stress has been measured using plasma carbonyls, specifically malondialdehyde (MDA). These conflicting results likely stem from the timing and method utilized to measure plasma carbonyls. PURPOSE: ...
Naito Takafumi - - 2003
Hange-koboku-to (Banxia-houpo-tang), a Chinese herbal (Kampo) medicine, has been used for improvement of hoarse voice, something foreign body sensation in the throat and/or esophagus, and swallowing reflex, among other conditions. One of the mechanisms of the empirical effects is assumed to be due to local changes in neuropeptide levels locally. ...
Schrauwen-Hinderling V B - - 2003
Intramyocellular lipid (IMCL) content has been reported to decrease after prolonged submaximal exercise in active muscle and, therefore, seems to form an important local substrate source. Because exercise leads to a substantial increase in plasma free fatty acid (FFA) availability with a concomitant increase in FFA uptake by muscle tissue, ...
Twerenbold R - - 2003
OBJECTIVE: To investigate the effect of different sodium concentrations in replacement fluids on haematological variables and endurance performance during prolonged exercise. METHODS: Thirteen female endurance athletes completed three four hour runs on a 400 m track. Environmental conditions differed between the three trials: 5.3 degrees C and snow (trial 1), ...
Heinemeier Katja - - 2003
Mechanical loading of cells induces the expression of transforming growth factor-beta-1, and acute exercise, which involves mechanical loading of several tissues, could thus increase its circulating level in humans. However, no consensus exists regarding the plasma concentration of this cytokine in resting subjects (reported values range from 500 to 18,300 ...
Petibois C - - 2003
We describe the metabolic changes in the blood that appeared during a maximal 400-m swimming test in 7 male swimmers by Fourier-transform infrared spectrometry (FT-IR spectrometry). A 400-m test (255.9 +/- 6.8 s) was performed during which stroke frequency and time to complete each pool distance were recorded. In three ...
Yamamoto T - - 2003
We examined the effect of listening to two different types of music (with slow and fast rhythm), prior to supramaximal cycle exercise, on performance, heart rate, the concentration of lactate and ammonia in blood, and the concentration of catecholamines in plasma. Six male students participated in this study. After listening ...
Andersen Johnnie Bremholm - - 2003
Digestion and physical activity are associated with large and sometimes opposite changes in several physiological parameters. Gastric acid secretion during digestion causes increased levels of plasma bicarbonate ([HCO-3](pl)), whereas activity leads to a metabolic acidosis with increased lactate and decrease in plasma bicarbonate. Here we describe the combined effects of ...
Winkelmayer Wolfgang C - - 2003
BACKGROUND: The effect of the glutamate carboxypeptidase II GCP2 1561C>T and the reduced folate carrier 1 RFC1 80G>A polymorphisms on folate and total homocysteine (tHcy) plasma levels of kidney transplant patients are unknown. METHODS: In a cross-sectional study of 730 kidney allograft recipients, GCP2 1561C>T, RFC1 80G>A, folate, and tHcy ...
KrzemiƄski K - - 2003
The aim of the study was to find out whether maximal exercise performed by healthy young men influences plasma adrenomedullin concentration (ADM) and is the peptide level related to the cardiovascular, metabolic and hormonal changes induced by exercise. Ten subjects (age 24+/-1.0 yr) participated in the study. They performed graded ...
Putman Charles T - - 2003
The present study examined the effect of short-term submaximal training on plasma acid-base balance during exercise. The influence of water and ion exchange between plasma, active muscles and erythrocytes in the response to training were also studied. The contributions of independent physicochemical variables (i.e. strong ion difference ([SID]), total concentration ...
Watt Matthew J - - 2003
We investigated the effect of increased plasma adrenaline on hormone-sensitive lipase (HSL) activity and extracellular regulated kinase (ERK) 1/2 phosphorylation during exercise. Seven untrained men rested for 20 min and exercised for 10 min at 60 % peak pulmonary oxygen uptake on three occasions: with adrenaline infusion throughout rest and ...
Ka Tuneyoshi - - 2003
OBJECTIVE: To investigate the effects of exercise and beer ingestion separately and combined on the plasma concentration of purine bases. METHODS: Six healthy men aged 30-39 years participated in 3 different experiments, in which they exercised for 30 min (at 70% of maximum oxygen uptake) and ingested beer (10 ml/kg ...
Chevion Shlomit - - 2003
Strenuous exercise leads to an increase in metabolic rate, increased production of reactive oxygen species, and compromised antioxidant defense systems. To study the effects of oxidative stress during strenuous exercise, a homogeneous group of 31 male subjects participated in a 6-month, 5 days/week training schedule involving two extreme marches of ...
Petibois Cyril - - 2003
Our purpose was to determine the plasma-volume (PV) change induced by a physical stress independent of the metabolic events that may interfere with physiological fluid shifts in to and out of the intravascular space. Our methods included using 178 exercise tests of varying duration and intensity for determination of PV ...
Boutcher Y N - - 2003
AIM: The purpose of this study was to examine the effect of plasma volume (PV) expansion, induced by 1 single bout of high intensity exercise, on venous capacitance. METHODS: Fourteen active but untrained healthy young males were randomly assigned to an exercise (n=7) or control group (n=7). The exercise protocol ...
Hiscock N - - 2003
Exercise stimulates the production and release of interleukin-6 (IL-6) from skeletal muscle. Glutamine is also synthesized in skeletal muscle and is involved in protein synthesis within this tissue. During exercise, plasma levels of glutamine decline, and this may affect the concentration of plasma IL-6 via a decrease in IL-6 synthesis ...
Lewczuk P - - 2003
Endothelin-1 plays an important role as a paracrine factor in the regulation of regional blood flow. Plasma levels may represent the net result of spill-over from local stimulation/release and elimination of endothelin-1. In order to compare changes in the concentration of endothelin-1 in the plasma of subjects performing different types ...
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