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Mujika Inigo - - 2010
Energicer is a new solution which purportedly increases evaporative cooling during exercise in the heat. To evaluate the effect of Energicer on performance during indoor rowing in a warm environment. Eighteen highly trained rowers (age 23.3 ± 6.7 y, height 181.3 ± 6.0 cm, mass 76.7 ± 5.0 kg, peak ...
Nolte Heinrich - - 2010
Opportunities to determine optimal rates of fluid ingestion could reduce the mass soldiers might need to carry on military missions. The first objective was to evaluate the effects of an ad libitum fluid replacement strategy on total body water (TBW), core temperature, serum sodium concentrations [Na+], and plasma osmolality (POsm). ...
Yanagisawa Osamu - - 2010
In this study, we determined the effects of different cooling treatments on exercised muscles. Seven adults underwent four post-exercise treatments (20-min ice-bag application, 60-min gel-pack application at 10 degrees C and 17 degrees C, and non-cooling treatment) with at least 1 week between treatments. Magnetic resonance diffusion- and T2-weighted images ...
Stanley Jamie - - 2010
We compared the effects of an ice-slush beverage (ISB) and a cool liquid beverage (CLB) on cycling performance, changes in rectal temperature (T (re)) and stress responses in hot, humid conditions. Ten trained male cyclists/triathletes completed two exercise trials (75 min cycling at ~60% peak power output + 50 min ...
Tyler Christopher James - - 2010
The aim of this two-part experiment was to investigate the effect of cooling the neck on time-trial performance in hot conditions (~30°C; 50% RH). In Study A, nine participants completed a 75-min submaximal (~60% V(O₂(max)) pre-load phase followed by a 15-min self-paced time-trial (TT) on three occasions: one with a ...
Coelho L G M - - 2010
The purpose of this study was to evaluate the effects of human head hair on thermoregulation during exercise carried out under solar radiation. 10 healthy male subjects (mean±SD: 25.1±2.5 yr; height: 176.2±4.0 cm; weight: 73.7±6.7 kg; VO(2max) 56.2±5.3 mLO(2)·kg (-1)·min (-1)) took part in 2 1 h-long trials of continuous exercise on a ...
Kwon Young Sub - - 2010
Local cooling can induce an ergogenic effect during a short-term intense exercise. One proposed method of personal cooling involves heat extraction from the palm. PURPOSE: In this study, we hypothesized that local palm cooling (PC) during rest intervals between progressive weight training sets will increase total repetitions and exercise volume ...
Takatsu Satomi - - 2010
The aim of the present study was to assess the response of serotonin (5-hydroxytryptamine; 5-HT) in the preoptic area and anterior hypothalamus (PO/AH) to thermoregulation during exercise in a warm environment. In addition, it was investigated whether a rapid increase in extracellular 5-HT levels in the PO/AH modifies the thermoregulatory ...
Hostler David - - 2010
Thermal protective clothing (TPC) worn by firefighters provides considerable protection from the external environment during structural fire suppression. However, TPC is associated with physiologic derangements that may have adverse cardiovascular consequences. These derangements should be treated during on-scene rehabilitation periods. To examine heart rate and core temperature responses during the ...
Armstrong Rachel G - - 2010
BACKGROUND: We evaluated the acute cardiovascular and thermoregulatory responses to repeated 70 degrees head-up tilts (HUT) performed following exercise-induced hyperthermia. METHODS: Eight male subjects underwent intermittent episodes of 70 degrees HUT in either a non-exercise/ non-heat stress state (NH) or an exercise-induced hyperthermic state (EIH). Subjects remained supine for 30 ...
Trebs Arthur A - - 2010
This study compared the activation of the clavicular head and the sternocostal head of the pectoralis major and the anterior deltoid when performing the bench press at several different angles. Fifteen healthy male subjects participated in this study. Subjects performed the chest press exercise at 0 (flat bench), 28, 44, ...
Gillis D Jason - - 2010
Menthol has recently been added to various cooling products that claim to enhance athletic performance. This study assessed the effect of two such solutions during exercise in warm, humid conditions. Twelve participants (22 ± 2.9 years; VO2peak 47.4 ± 6.2 mL kg(-1) min(-1)) completed a peak power (PO(peak)) test and ...
Karanjai Subhadeep - - 2010
(1) To evaluate the role of vestibular exercises in the management of benign paroxysmal positional vertigo (BPPV). (2) To compare the three vestibular exercises (Semont's manoeuvre, Epley's manoeuvre or Brandt-Daroff exercises) in the treatment of BPPV. Prospective randomised study Fourty-eight patients diagnosed as BPPV in the study period November 2005-2006 ...
Zeng Ling-Qing - - 2010
The effects of temperature on resting oxygen consumption rate (MO2rest) and excess post-exercise oxygen consumption (EPOC) after exhaustive exercise (chasing) were measured in juvenile southern catfish (Silurus meridionalis) (8.40±0.30 g, n=40) to test whether temperature has a significant influence on MO2rest, maximum post-exercise oxygen consumption rate (MO2peak) and EPOC and ...
Cooper Erica S - - 2010
INTRODUCTION: The extent to which exercise in the heat modifies leukocytosis and the relationship between the leukocytosis and tumor necrosis factor-alpha (TNF-alpha) or cortisol is not well understood. Thus, this study attempted to determine the combined effect of exercise and differing elevations in core temperature on exercise-induced leukocytosis and to ...
Bogerd Nina - - 2010
Although pre-cooling is known to enhance exercise performance, the optimal cooling intensity is unknown. We hypothesized that mild cooling opposed to strong cooling circumvents skin vasoconstriction and thermogenesis, and thus improves cooling efficiency reflected in improved time to exhaustion. Eight males undertook three randomized trials, consisting of a pre-cooling and ...
Brazaitis Marius - - 2010
The aim of this study was to investigate the physiological and psychological responses during and after high-intensity exercise in a warm and humid environment in subjects wearing shirts of different fabrics. Eight healthy men exercised on two separate occasions, in random order, wearing two types of long-sleeve T-shirt: one made ...
Marino F E - - 2010
Objective To examine the neuromuscular responses to 60 minutes of self-paced high-intensity exercise punctuated with 6 x 1-minute "all-out" sprints at 10-minute intervals in moderate (19.8 degrees C, SEM 0.3) and warm (33.2, SEM 0.1), humid ( approximately 64% relative humidity) conditions with either complete hydration (CH) or without hydration ...
Egaña Mikel - - 2010
This study investigated cycling performance and oxygen uptake V(O)₂kinetics between upright and two commonly used recumbent (R) postures, 65 degrees R and 30 degrees R. On three occasions, ten young active males performed three bouts of high-intensity constant-load (85% peak-workload achieved during a graded test) cycling in one of the ...
Kenefick R W - - 2010
This study determined the effects of hypohydration on aerobic performance in compensable [evaporative cooling requirement (E(req)) < maximal evaporative cooling (E(max))] conditions of 10 degrees C [7 degrees C wet bulb globe temperature (WBGT)], 20 degrees C (16 degrees C WBGT), 30 degrees C (22 degrees C WBGT), and 40 ...
Hostler David - - 2010
Performing fire suppression activities results in cardiovascular stress, hyperthermia, and hypohydration. Fireground rehabilitation (rehab) is recommended to blunt the deleterious effects of these conditions. We tested the hypothesis that three rehydration fluids provided after exercise while wearing thermal protective clothing (TPC) would produce different heart rate or core temperature responses ...
Siegel Rodney - - 2010
To investigate the effect of ice slurry ingestion on thermoregulatory responses and submaximal running time in the heat. On two separate occasions, in a counterbalanced order, 10 males ingested 7.5 g·kg(-1) of either ice slurry (-1°C) or cold water (4°C) before running to exhaustion at their first ventilatory threshold in ...
Mora-Rodriguez Ricardo - - 2010
To determine if the increases in rectal temperature (T(REC)) during exercise in the heat at a given percent of VO2peak depend on a subject's aerobic fitness level. On three occasions, 10 endurance-trained (Tr) and 10 untrained (UTr) subjects (VO2peak: 60 +/- 6 vs. 44 +/- 3 mL kg(-1) min(-1), P ...
Johnson Evan C - - 2010
CONTEXT: The protective equipment worn during American football has been shown to increase thermal strain; however, the perception of this increased heat has not been examined. OBJECTIVE: To evaluate perceptual responses of American football players while wearing different uniforms during exercise in the heat and to evaluate how these responses ...
Duffield Rob - - 2010
This study investigated the effects of precooling on performance and pacing during self-paced endurance cycling in the heat and, further, the effects of cooling on contractile function as a mechanism for performance changes. After familiarization, eight male cyclists performed two randomized 40-min time trials on a cycle ergometer in 33 ...
Casa Douglas J - - 2010
Authors of most field studies have not observed decrements in physiologic function and performance with increases in dehydration, although authors of well-controlled laboratory studies have consistently reported this relationship. Investigators in these field studies did not control exercise intensity, a known modulator of body core temperature. To directly examine the ...
Hue O - - 2010
The Tropical climate imposes a high level of physiological stress, which could modify the target heart rate in training load prescription, as the recommendations are often determined by maximal oxygen uptake testing in temperature-neutral laboratories. To test this hypothesis, 7 high-level cyclists performed two randomised maximal tests in neutral (19.2±0.9°C; ...
Greiner Jesse G - - 2010
Hyperthermia potentiates the influence of CO(2) on pulmonary ventilation (.V(E)). It remains to be resolved how skin and core temperatures contribute to the elevated exercise ventilation response to CO(2). This study was conducted to assess the influences of mean skin temperature (_T(SK)) and end-tidal PCO(2) (P(ET)CO(2)) on .V(E) during submaximal ...
Kounalakis Stylianos N - - 2010
We tested the hypothesis that menthol application would reduce the magnitude and initiation of sweating via excitation of cold-sensitive afferent pathways and concurrently via a cross-inhibition of heat loss pathways in acclimatized (swimmers, SW) and non acclimatized (control, CON) subjects in cool water. It was expected this effect to be ...
Ely Brett R - - 2010
Environmental heat stress degrades aerobic performance; however, little research has focused on performance when the selected task elicits modest elevations in core body temperature (<38.5 degrees C). PURPOSE: To determine the effect of environmental heat stress, with modest hyperthermia, on aerobic performance and pacing strategies. METHODS: After a 30-min cycling ...
Scroop Garry C - - 2010
Whereas the prevalence of exercise-induced hypoxemia (EIH) in endurance athletes is commonly reported as approximately 50%, most previous studies have not corrected PaO2 for exercise-induced hyperthermia. Furthermore, although a detrimental effect on aerobic performance has been assumed, no study has measured arterial oxygen content (CaO2) in this context. PURPOSE: To ...
Duffield Rob - - 2009
The current study investigated the effects of a pre-cooling intervention on physiological and performance responses to team-sport training in the heat. Seven male lacrosse players performed a familiarization session and 2 randomized, counterbalanced sessions consisting of a 30-minute intermittent-sprint conditioning session. Prior to the sessions, players performed a 20-minute mixed-method, ...
Miyazawa Taiki - - 2009
BACKGROUND: Centric administration of gamma-aminobutyric acid (GABA) has been implicated to affect temperature regulation in animals during rest or under anesthesia. However, there are few reports concerning the effects of the oral administration of GABA on temperature regulation in humans during rest and exercise. In order to clarify the effects ...
Walker Thomas B - - 2009
The purpose of this study was to determine if using the CoreControl Rapid Thermal Exchange (RTX), a commercial palm cooling device, during active rest periods of multiple set training is an effective means to increase performance. Ten volunteers (5 men, 5 women) completed a VO2max test on a motorized treadmill ...
Sinclair Wade H - - 2009
PURPOSE: To contrast the effects of three postcooling techniques in reducing body core temperature (Tc) in exercise-induced hyperthermic participants on the cessation of exercise. METHODS: Eleven healthy active male volunteers were cooled during a 40-min period using three different methods: ice packs to the neck, axillae, and groin (ICE); water ...
Merla Arcangelo - - 2010
In this paper we used high-resolution thermal imaging to visualize the human whole body anterior cutaneous temperature (T(c)) variations in well-trained runners during graded exercise. Fifteen male volunteers underwent a graded treadmill test until reaching their individual maximal heart rate. Total body T(c) decreased as the subjects started the exercise. ...
Hodges Gary J - - 2009
The cutaneous circulation is influenced by a variety of thermoregulatory (skin and internal temperature-driven) and nonthermoregulatory (e.g., baroreflex, exercise-associated reflexes) challenges. The responses to these stimuli are brought about through vasoconstrictor nerves, vasodilator nerves, and changes in the local temperature of the vessels themselves. In this review, we examine how ...
Price Michael J - - 2009
The purpose of this study was to examine the effects of both pre-exercise and combined pre-exercise and midexercise cooling strategies during simulated match play in elite female soccer players in the heat. Eight elite female soccer players performed two 45 min periods of intermittent running separated by 15 min seated ...
Shorten Allison L - - 2009
BACKGROUND: The performance of exercise while immersed in cold water has been shown to influence energy intake in the subsequent meal. However, the effect of ambient temperature during land-based exercise is not known. OBJECTIVES: Our aims were to investigate the effect of exercise performed in the heat on energy intake ...
Lee Joo-Young - - 2010
The purpose of the present study was to examine the discrepancies in rectal temperature (T (re)) at various depths. Nineteen young males performed two bouts of bicycle exercise and recovery. T (re) was simultaneously measured at depth of 4, 6, 8, 10, 13, 16, and 19 cm, alongside the measurement ...
Ellegaard Karen - - 2009
OBJECTIVE: Use of ultrasound Doppler (USD) in diagnosing and treatment monitoring of patients with RA has increased considerably. Hyperaemia is an integral part of the inflammatory response, and the amount of USD activity in an inflamed synovium may therefore be used to quantify the inflammatory activity. It is unclear, however, ...
Mündel Toby - - 2010
We have previously demonstrated that provision of a cold fluid (4 degrees C) during exercise in the heat increases fluid intake and improves exercise capacity when compared to a control fluid (19 degrees C). The present study investigated whether these positive effects could simply be replicated with a cooling agent, ...
Lemire Bruno B - - 2009
PURPOSE: We evaluated differences between sexes in core cooling rates during cold water immersion after exercise-induced hyperthermia. METHODS: Ten male (M) and nine female (F) participants, matched for body surface area-to-mass ratio (AD/M) (F: 268 +/- 19 vs M: 261 +/- 16 cm2 x kg(-1)), were recruited for the study. ...
Barwood Martin James - - 2009
Major sporting events are often held in hot and humid environmental conditions. Cooling techniques have been used to reduce the risk of heat illness following exercise. This study compared the efficacy of five cooling techniques, hand immersion (HI), whole body fanning (WBF), an air cooled garment (ACG), a liquid cooled ...
Kallinich Tilmann - - 2009
Hyperthermia is characterized by an increase of body core temperature due to exogenous heat exposure and/or endogenous heat production. Contrary to fever the hypothalamic-controlled temperature set point remains unchanged. AIM: To demonstrate that exercise-induced hyperthermia is a common phenomenon in childhood. CASE: We describe a 5-year-old boy, who attended our ...
McEntire Serina J SJ Shriners Hospitals for Children, and Department of Surgery, The University of Texas Medical Branch, Galveston, Texas 77550, - - 2009
An important safety concern when exercising burned patients is the potential for an excessive increase in core body temperature (hyperthermia=body core temperature>39 degrees C) during exercise. We examined the thermoregulatory response to exercise in the heat (31 degrees C, relative humidity 40%) in a 17-year-old boy with a 99% TBSA ...
Roelands Bart - - 2009
The original central fatigue hypothesis suggested that fatigue during prolonged exercise might be due to higher 5-HT activity. Therefore, we examined the effects of acute administration of a selective 5-HT reuptake inhibitor (SSRI) on performance and thermoregulation. Eleven healthy trained male cyclists completed four experimental trials (two in 18 degrees ...
Barwood Martin J - - 2009
INTRODUCTION: Recent research has focused on developing air-ventilated garments to improve evaporative cooling in military settings. This study assessed a ventilated vest (Vest) in hot (45 degrees C), dry (10% RH) ambient conditions over 6 h of rest and exercise. It was hypothesized that the Vest would lower the thermal ...
Morris Chris C Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK. - - 2009
Chronobiological investigations into core temperature during and after exercise can involve ambulatory measurements of intestinal temperature during actual competitions, esophageal temperature measurements in laboratory simulations, or rectal temperature, which can be measured in both the field and laboratory. These sites have yet to be compared during both morning and afternoon ...
Kambia N K - - 2009
The use of extemporaneously prepared admixtures of drugs must be supported by documentation of their chemical stability. To assess the physical compatibility and the chemical stability of nefopam hydrochloride, a centrally acting non-opioid analgesic, when admixed with selected proton pump inhibitors (omeprazole, esomeprazole or pantoprazole), in bionolyte G5 injection for ...
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