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Results 351 - 400 of 694
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Kearns Charles F - - 2002
PURPOSE: The purpose of this 8-wk study was to examine the effect of therapeutic levels of clenbuterol on aerobic performance and hemodynamics associated with exercise. METHODS: Twenty-three unfit Standardbred mares were divided into four experimental groups, clenbuterol (2.4 microg x kg(-1) body weight twice daily) plus exercise (20 min at ...
Shishehbor Mehdi H - - 2002
PURPOSE: An abnormally attenuated heart rate recovery after exercise is a predictor of mortality that is thought to reflect decreased parasympathetic activity. Lower educational level may be associated with automatic imbalance. We sought to assess the association of educational level with heart rate recovery. SUBJECTS AND METHODS: Among 5246 healthy ...
Chauhan Vijay S - - 2002
BACKGROUND: Sex differences have been described in resting cardiac repolarization and susceptibility to torsade de pointes in humans. This study compares the QT-interval and QT-dispersion dynamics during exercise and recovery between healthy men and women. METHODS: Twenty healthy subjects (10 males aged 30 +/- 4 years, 10 females aged 31 ...
Swank Ann Marie - - 2002
In this investigation we studied the effect of manipulating the acid-base balance through sodium bicarbonate (NaHCO(3)) ingestion on ratings of perceived exertion for the overall body (RPE-O) and on differentiated ratings for the leg and chest (RPE-L, RPE-C) during exercise recovery. Six women of college age underwent 3 experimental conditions ...
Bouassida A - - 2003
The purpose of this study was to examine the effect of a recovery period between two periods of exercise on bone metabolism and related hormones. Concentrations of serum parathyroid hormone ([PTH]), plasma ionized calcium ([Ca(2+)]) and total calcium were measured. A group of 12 healthy men aged 20-27 years participated ...
Nummela A - - 2002
The aim of the present study was to investigate whether the breathing of hyperoxic gas affects hemoglobin oxygen saturation (S(a)O(2)) and blood acidosis during intense intermittent exercise and recovery in sprint runners. The hypothesis was that the breathing of hyperoxic gas prevents S(a)O(2) from decreasing, delays blood acidosis during the ...
Lind Lars - - 2002
OBJECTIVE: We investigated the associations between heart rate recovery after exercise (as a suggested measure of vagal activity), heart rate variability, and measurements of the insulin resistance syndrome. MATERIAL AND METHODS: Seventy men aged 70 years were examined with a symptom-limited bicycle exercise test, a 24-hour heart rate variability test, ...
Van Hall Gerrit - - 2002
This study was conducted to investigate the role of splanchnic and adipose tissue in the regulation of fatty acid (FA) metabolism at rest, during 1 h of semi-recumbent cycle exercise at 60 % of maximal power output and 3 h of recovery. In six post-absorptive healthy volunteers catheters were placed ...
Brinkworth Grant David - - 2002
A randomized, double-blind, placebo controlled design was used in which 13 elite female rowers, all of whom had competed at World Championships, were supplemented with 60 g day-1 of either bovine colostrum (BC; n = 6) or concentrated whey protein powder (WP; n = 7) during 9 weeks of pre-competition ...
Butudom P - - 2002
Because the primary stimulus for thirst is an increase in plasma tonicity, we hypothesised that dehydrated horses would drink a greater total volume of fluid voluntarily during the first hour of recovery when they were initially offered salt water. To test this hypothesis, bodyweight (bwt), fluid intake (FI) and [Na+] ...
Birch Karen - - 2002
The aim of the present study was to examine the pattern of cardiovascular recovery from exercise in 15 women (age, 20.3 +/- 1.4 years; body mass, 61.5 +/- 4.3 kg) across two phases of oral contraceptive (OC) use: 21 days of consumption and 7 days of withdrawal. Cardiovascular recovery was ...
Jaja S I - - 2002
The effect of a three-minute exercise step test (submaximal) on the recovery of tidal volume (V(T)), respiratory frequency (f(R)) and minute ventilation (V(E)) has been investigated in non-asthmatic subjects, asthmatic subjects that exercise regularly and asthmatics that do not participate in regular exercise. Recovery was observed over twenty minutes at ...
Halson Shona L - - 2002
To study the cumulative effects of exercise stress and subsequent recovery on performance changes and fatigue indicators, the training of eight endurance cyclists was systematically controlled and monitored for a 6-wk period. Subjects completed 2 wk of normal (N), intensified (ITP), and recovery training. A significant decline in maximal power ...
Carter Robert R - - 2002
To identify the effects of exercise recovery mode on cutaneous vascular conductance (CVC) and sweat rate, eight healthy adults performed two 15-min bouts of upright cycle ergometry at 60% of maximal heart rate followed by either inactive or active (loadless pedaling) recovery. An index of CVC was calculated from the ...
Ratel S - - 2002
The aim of the present study was to investigate the effects of age and recovery duration on the time course of cycling peak power and blood lactate concentration ([La]) during repeated bouts of short-term high-intensity exercise. Eleven prepubescent boys (9.6 +/- 0.7 yr), nine pubescent boys (15.0 +/- 0.7 yr) ...
Kacin Alan - - 2002
The present study investigated the effect of active recovery, following 35 days of horizontal bed rest, on the magnitude and time course of the pressor and heart rate responses to sustained 90 minute submaximal isometric contraction of unilateral knee extensor muscles. Ten healthy male subjects were tested immediately post bed ...
Romer L M - - 2002
The present study examined the influence of specific inspiratory muscle training (IMT) upon recovery time during repetitive sprint activity, as well as the physiological and perceptual responses to fixed intensity shuttle running. Using a double-blind placebo-controlled design, 24 male repetitive sprint athletes were assigned randomly to either an IMT (n ...
Jacks Dean E - - 2002
Changes in cortisol concentration in response to exercise at 3 different intensities were quantified. Ten apparently healthy, recreationally active males participated. On 4 separate occasions, subjects were assigned a random order of 1-hour cycle ergometer bouts of exercise at 44.5 +/- 5.5%, 62.3 +/- 3.8%, and 76.0 +/- 6.0% (mean ...
Fluhr J W - - 2002
BACKGROUND: It is not known whether distinct anatomical locations will respond with different recovery rates following acute barrier challenges. OBJECTIVES: To investigate whether barrier parameters differ at five body sites during recovery from acute disruption. METHODS: Acute barrier disruption was achieved by tape stripping and by acetone extraction of stratum ...
Cottrell G Trevor - - 2002
The purpose of this study was to examine the effect of varying recovery intervals on multiple-bout, short-duration, high-intensity cycling efforts of adult men supplemented with creatine (Cr) or a placebo (Pl). Thirty subjects underwent 3 trials of a maximal cycling protocol (T(0), T(1), T(2)). T(0) included V(O)2 max testing and ...
El-Sayed Mahmoud S - - 2002
The present study examined the influence of ingesting a moderate dose of alcohol on platelet count and platelet aggregation during recovery following exercise. Nineteen subjects (11 male and 8 female) were studied immediately after a standardised cycle ergometer test and during the 24-h period of recovery. In random order, alcohol ...
Kramár E A - - 2002
Several lines of evidence suggest that integrin receptors play a pivotal role in consolidation of long-term potentiation (LTP), but which of the many integrin dimers are involved remains to be discovered. The present study used an LTP reversal paradigm to test if alpha3 integrins make an important contribution. Function blocking ...
Singer Richard B - - 2002
OBJECTIVE: The objective of this article is to present results from the latest of 3 recent reports from the Cleveland Clinic on excess mortality associated with abnormal delay in the recovery of an elevated pulse rate produced in a treadmill exercise test. This is done in the context of a ...
Cappelen-Smith C - - 2001
Threshold tracking was used to compare excitability properties (stimulus-response curves, strength-duration properties, recovery cycle and threshold electrotonus) of the median nerve in 11 patients with chronic inflammatory demyelinating polyneuropathy (CIDP) and 25 healthy controls. Stimulus-response curves were significantly different: threshold was much higher, the slope of the curves reduced and ...
Roest A A - - 2001
After atrial correction of transposition of the great arteries (TGA), dysfunction of the systemic right ventricle at rest and during exercise has been reported. Information on changes in systemic right ventricular function during recovery from exercise is lacking. This study evaluates cardiac recovery from supine exercise using magnetic resonance (MR) ...
Chen J T - - 2001
Post-exercise recovery of intracellular pH (pH(i)) assessed using phosphorus magnetic resonance spectroscopy has not been previously evaluated in its entirety due to its complex time-course and missing data points resulting from a transient loss of inorganic phosphate signal. By considering the transition from exercise to recovery as a step function ...
Watanabe J - - 2001
BACKGROUND: An attenuated heart rate recovery after exercise has been shown to be predictive of mortality. In prior studies, recovery heart rates were measured while patients were exercising lightly, that is, during a cool-down period. It is not known whether heart rate recovery predicts mortality when measured in the absence ...
Marchand I - - 2001
Temperature and vascular responses during exercise recovery were examined in men and women of similar age and fitness status (VO2max: 76 +/- 5 vs 73 +/- 5 mL O2 / kg Fat Free Mass x min). Forearm blood flow (venous occlusion plethysmography; FBF), rectal (Trectal) and forearm skin (Tskin) temperatures ...
Myers J - - 2001
BACKGROUND: The time required for oxygen uptake (O(2)) to return to baseline level (recovery kinetics) is prolonged in patients with reduced ventricular function, and the degree to which it is prolonged is related to the severity of heart failure, markers of abnormal ventilation, and prognosis. In the present study, we ...
Carter R R - - 2001
Are women more susceptible to acute postexercise orthostatic hypotension compared with men? We hypothesized that decreases in arterial pressure during recovery from dynamic exercise are greater in women compared with men. We studied 8 men and 11 women during inactive and active recovery from cycling exercise. Heart rate, stroke volume ...
Miura H H Department of Human and Social Sciences, Faculty of Integrated Arts and Sciences, University of Tokushima, Tokushima, 770-8502 Japan. - - 2001
Using a near infrared (NIR) imaging device, we tested the hypothesis that regional differences in oxygen status could be detected in the gastrocnemius muscle during exercise and recovery. Six healthy subjects performed the standing plantar flexion exercises for 2 min; the frequency was one contraction per second. The NIR imaging ...
Jammes Y - - 2001
We studied surface electromyogram (SEMG) changes during 1-h endurance cycling in 12 healthy subjects of whom five were involved in mountain bike training programme. The work load was set at 50% of the predicted maximal heart rate. The surface EMG and the compound evoked muscle action potential (M-wave) from the ...
Blomstrand E - - 2001
Branched-chain amino acids (BCAA) or a placebo was given to seven subjects during 1 h of ergometer cycle exercise and a 2-h recovery period. Intake of BCAA did not influence the rate of exchange of the aromatic amino acids, tyrosine and phenylalanine, in the legs during exercise or the increase ...
Engels H J - - 2001
The purpose of this study was to examine the effects of long-term ginseng supplementation on short, supramaximal exercise performance and short-term recovery. Using a double-blind protocol, 24 healthy, active women were randomly assigned to a ginseng (n = 12) or placebo (n = 12) treatment group. Each participant added a ...
Gomez-Merino D - - 2001
The branched-chain amino acid L-valine competes with tryptophan for transport into the brain and has previously been shown to decrease brain 5-HT synthesis. The purpose of this study was to assess, using a combined venous catheterization and in vivo microdialysis method, the effect of pre-exercise L-valine administration on 5-hydroxytryptamine (5-HT) ...
Zhao K - - 2001
The effect of penetration enhancer (i.e., 1, 2, 3 and 5% menthone in combination with 50% ethanol (EtOH)) was investigated on the in vitro percutaneous absorption of tamoxifen, and post-recovery epidermal permeability after removal of the above enhancer. The flux of tamoxifen with menthone in combination with 50% EtOH was ...
Gomez-Merino D - - 2001
Previous neurochemical studies have reported different pattern of 5-HT release during exercise varying across either exercise conditions or forebrain sites. This in vivo microdialysis study is the first to examine the impact of an acute intensive treadmill running (2 h at 25 m.min(-1), which is close to exhaustion time), on ...
Raine N M - - 2001
PURPOSE: Postexercise hypotension may be the result of an impaired vasoconstrictor response. This hypothesis was investigated by examining the central and peripheral hemodynamic responses during supine and seated recovery after maximal upright exercise. METHODS: After supine or seated baseline measurements, seven normotensive male volunteers completed a graded upright cycling protocol ...
Terziotti P - - 2001
The recovery of the baseline autonomic control of cardiovascular activity after exercise has not been extensively studied. In 12 healthy subjects, we assessed the time-course of recovery by autoregressive spectrum and cross-spectrum analysis of heart period and systolic blood pressure during the 3 h after the end of 20 min ...
Finstad E W - - 2001
PURPOSE: To determine the effects of magnesium (Mg2+) supplementation on performance and recovery in physically active women using the sensitive and recently advanced measure of ionic Mg2+ (iMg). METHODS: Participants (N = 121) were screened for [iMg] in plasma, with 44 (36.4%) exhibiting [iMg] below the normal range of 0.53-0.67 ...
Olbrich R - - 2001
In this study, the authors aimed to identify patterns of autonomic dysfunction and neurocognitive deficit recovery. The authors performed laboratory assessments on 66 patients with schizophrenia immediately after an acute psychotic episode and 6, 12, and 18 months later. Shortly after the psychotic episode, the patients displayed cardiovascular hyperarousal at ...
Ferraresi A - - 2001
The present research analysed on chronic animals the functional recovery of eye motility after impairment of the proprioceptive input at the level of the semilunar ganglion. The horizontal vestibulo-ocular reflex (HVOR) was recorded in normal pigmented rabbits before and after a partial electrolytic lesion of the semilunar ganglion. The recordings ...
Cochard H - - 2001
Hydraulic conductivity in the terminal branches of mature beech trees (Fagus sylvatica L.) decreased progressively during winter and recovered in the spring. The objective of this study was to determine the mechanisms involved in recovery. Two periods of recovery were identified. The first recovery of hydraulic conductivity occurred early in ...
Gildberg A - - 2001
The present paper shows that the fish by-products male Arctic capelin and Atlantic cod intestines can be utilized as raw materials for the production of high value fish sauce for human consumption. By supplementing minced capelin with 5-10% enzyme-rich cod pyloric caeca, a good recovery of fish sauce protein (60%) ...
Sayers S P - - 2001
In this study we investigated force loss and recovery after eccentric exercise, and further characterized profound losses in muscle function (n = 192 subjects--98 males, 94 females; population A). Maximal voluntary contractile force (MVC) was assessed before, immediately after, and at 36 and 132 h after eccentric exercise. Two groups ...
Akima H - - 2000
We investigated the recruitment plasticity of the superficial tibialis anterior (TA-s) and deep tibialis anterior (TA-d) regions of neuromuscular compartments (NMCs) in the m. tibialis anterior (TA) during exercise using echo-planar imaging (EPI). Six healthy men performed dorsiflexion exercise at 60% of maximum voluntary contraction at a frequency of 10 ...
Conill C - - 2000
A total of 686 Tiris half-duplex passive injectable transponders (PIT) of two sizes (23 and 32 mm) were randomly injected s.c. in three positions, armpit, ear scutulum, and upper lip, in 343 fattening calves (1 to 3 mo old). Injections were performed by two trained and two untrained operators. Losses ...
Monedero J - - 2000
The recovery process in sport plays an essential role in determining subsequent athletic performance. This study investigated the effectiveness of different recovery interventions after maximal exercise. Eighteen trained male cyclists initially undertook an incremental test to determine maximal oxygen consumption. The four recovery interventions tested were: passive, active (50% maximal ...
Wigernaes I - - 2000
This study was conducted to examine the effects of different recovery regimens on white blood cell count (WBCC) and muscle enzyme activities following strenuous, submaximal, steady state workouts on a treadmill. Fourteen endurance trained, healthy, non-smoking college-aged males participated in the study. The workouts were followed by either 15-min of ...
Nishime E O EO Clinical Research and Exercise Laboratory, Department of Cardiology, Desk F25, Cleveland Clinic Foundation, Cleveland, OH 44195, - - 2000
Both attenuated heart rate recovery following exercise and the Duke treadmill exercise score have been demonstrated to be independent predictors of mortality, but their prognostic value relative to each other has not been studied. To assess the associations among abnormal heart rate recovery, treadmill exercise score, and death in patients ...
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