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Results 301 - 350 of 1142
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Hayashi Keiji - - 2006
We examined whether an increase in skin temperature or the rate of increase in core body temperature influences the relationship between minute ventilation (Ve) and core temperature during prolonged exercise in the heat. Thirteen subjects exercised for 60 min on a cycle ergometer at 50% of peak oxygen uptake while ...
Miller Alison A - - 2005
Neoprene sleeves are alleged to increase heat in skeletal muscle, but no published research supports this belief. To quantify anterior thigh skin and intramuscular temperature changes in varsity athletes wearing a neoprene thigh sleeve. A 2 x 2 x 3 x 5 factorial design with replicated measures on 3 variables. ...
Eglin Clare M - - 2005
Two studies were undertaken to determine whether firefighter instructors are capable of performing a simulated rescue task after undertaking a live fire training exercise (LFTE) lasting approximately 40 min. In the first study, ten instructors performed two simulated rescue tasks in air at 19 degrees C, involving dragging an 81-kg ...
Evans Tina M - - 2005
STUDY OBJECTIVE: The efficacy of using impulse oscillometry (IOS) as an indirect measure of airflow obstruction compared to spirometry after exercise challenges in the evaluation of exercise-induced bronchoconstriction (EIB) has not been fully appreciated. The objective was to compare airway responses following room temperature and cold temperature exercise challenges, and ...
Long Blaine C - - 2005
Cryotherapy is commonly used for a variety of purposes; however, the body's response to cryotherapy immediately postexercise is unknown. To investigate the effect of prior exercise on crushed-ice-bag treatment of a large muscle group. 2 x 3 repeated-measures design on depth (1 cm and 2 cm below adipose tissue) and ...
Lacerda Ana Cristina R - - 2005
To assess the role of nitric oxide (NO) in central thermoregulatory mechanisms during exercise, 1.43 micromol (2 microL) of N(omega)-nitro-L-arginine methyl ester (L-NAME, n=6), a NO synthase inhibitor, or 2 microL of 0.15M NaCl (SAL, n=6) was injected into the lateral cerebral ventricle of male Wistar rats immediately before the ...
Yamashita Yoichiro - - 2005
The purpose of this study was to investigate the effect of cool exposure on lipolytic response during prolonged intermediate-intensity exercise in humans. Eight male subjects participated in this study; they performed 120-min cycle ergometer exercise at 60% of maximal oxygen uptake (VO2max) in a climatic chamber at 10 degrees C ...
Zhang Jian - - 2005
We analyzed 18 high-quality waveform doublets with time separations of up to 35 years in the South Sandwich Islands region, for which the seismic signals have traversed the inner core as PKP(DF). The doublets show a consistent temporal change of travel times at up to 58 stations in and near ...
Kacin Alan - - 2005
The effect of graded ischaemia in the legs on the regulation of body temperature during steady-state exercise was investigated in seven healthy males. It was hypothesised that graded ischaemia in the working muscles increases heat storage within the muscles, which in turn potentiates sweat secretion during exercise. Blood perfusion in ...
Nakamura Kimitsugu - - 2005
We have studied ultra-weak photon emission (UPE) from living organisms. We report here some features of the UPE from human hand by means of photon counting techniques. The intensity of the UPE depended on the position of human hand; nail>finger>palm. As the temperature declined, the intensity of the UPE from ...
MacLellan Crystal L - - 2005
Hyperthermia worsens outcome in clinical and experimental studies of ischemic stroke. Thus, we tested whether hyperthermia aggravates intracerebral hemorrhage (ICH) in rats. A striatal hemorrhage was produced via an infusion of bacterial collagenase. In a preliminary experiment, we compared brain and core temperatures (via telemetry) during heating (infrared lamp). The ...
Togo Fumiharu - - 2005
Seasonal changes in ambient temperature and day length are thought to modify habitual physical activity. However, relationships between such environmental factors and the daily physical activity of older populations remain unclear. The present study thus examined associations between meteorological variables and the number of steps taken per day by elderly ...
Mekjavic Igor B - - 2005
The present study evaluated the effect of 35 days of experimental horizontal bed-rest on exercise and immersion thermoregulatory function. Fifteen healthy male volunteers were assigned to either a Control (n = 5) or Bed-rest (n = 10) group. Thermoregulatory function was evaluated during a 30-min bout of submaximal exercise on ...
Storms Timothy N - - 2005
Using an iteration method, optimal hand-injected immobilization dosages of carfentanil/xylazine (CAR/XYL) were determined for 13 adult white-tailed deer (Odocoileus virginianus). Deer were temporarily restrained in a squeeze chute and were repeatedly immobilized one to four times at 2-5-wk intervals from December 2002 to March 2003. A fixed ratio of 1 ...
Webster J - - 2005
During the 1990s, emphasis on the health and safety of people who exercise in hot, humid conditions increased and many organizations became aware of the need for protection against heat-related disorders. A practical, pre-cooling strategy applicable to several sporting codes, which is low cost, easy to use, light-weight and which ...
Shirreffs Susan M - - 2005
This review covers published literature on the influence of whole-body hydration status on exercise performance. The majority of information in this area relates to endurance exercise performance, but information on power, strength, and sporting skills has also been investigated. These areas form the focus of the current review. It is ...
Kaparaju P L N - - 2005
The effects of thermal and chemical treatments, mechanical maceration and freezing and thawing on recovering the remaining methane potential of the >2 mm solid fraction of digested cow manure - which accounted for 30% of the original potential of digested cow manure - were studied in laboratory batch assays at ...
Loo Say Chye Joachim - - 2005
Isothermal crystallization through annealing at 115 degrees C was conducted to increase the degree of crystallinity of poly (lactide-co-glycolide) (PLGA). The maximum increase in the degree of crystallinity (approximately 21%) was achieved after 60 min of annealing. The crystal size/perfection was observed to increase with annealing time. The annealed PLGA ...
Clark T D - - 2005
Several previous reports, often from studies utilising heavily instrumented animals, have indicated that for teleosts, the increase in cardiac output (Vb) during exercise is mainly the result of an increase in cardiac stroke volume (V(S)) rather than in heart rate (fH). More recently, this contention has been questioned following studies ...
Gregson W A - - 2005
To examine the influence of pre-warming on the physiological responses to prolonged intermittent exercise in ambient temperatures of 21.5 +/- 0.6 degrees C and relative humidities of 35.7 +/- 5.4% (mean +/- s), six healthy men performed intermittent treadmill running (30-s bouts at 90% of maximal oxygen uptake separated by ...
Mitono Hiroyuki - - 2005
We examined the hypothesis that elevation of the body core temperature threshold for forearm skin vasodilation (TH(FVC)) with increased exercise intensity is partially caused by concomitantly increased plasma osmolality (P(osmol)). Eight young male subjects, wearing a body suit perfused with warm water to maintain the mean skin temperature at 34 ...
McAnulty S R - - 2005
The purpose of this investigation was to examine oxidative markers after exercise in a hyperthermic environment (35 degrees C, 70 % RH) (Hot) versus a neutral environment (25 degrees C, 40 % RH) (Con). Hyperthermia may exacerbate oxidative stress by uncoupling the mitochondrial respiratory chain or by inhibiting antioxidant defense ...
Kinugasa Ryuta - - 2005
The purpose of this study was to examine the effect of selective skin cooling over m. vastus lateralis (VL) on the activation patterns of quadriceps femoris muscle during knee extension exercise (KEE) using muscle function magnetic resonance imaging (mfMRI). The isometric force production of the right thigh was tested in ...
Ichinose Takashi - - 2005
It is well known that hyperosmolality suppresses thermoregulatory responses and that plasma osmolality (P(osmol)) increases with exercise intensity. We examined whether the decreased esophageal temperature thresholds for cutaneous vasodilation (TH(FVC)) and sweating (TH(SR)) after 10-day endurance training (ET) are caused by either attenuated increase in P(osmol) at a given exercise ...
Wadhwa A - - 2005
BACKGROUND: Hypothermia may be an effective treatment for stroke or acute myocardial infarction; however, it provokes vigorous shivering, which causes potentially dangerous haemodynamic responses and prevents further hypothermia. Magnesium is an attractive anti-shivering agent because it is used for treatment of postoperative shivering and provides protection against ischaemic injury in ...
Hornery D J - - 2005
This study examined the effect of a 10-min, halftime cooling application on physiological and psychological parameters known to affect performance. Fourteen volunteers (10 male, 4 female) completed two randomised trials 48 hr to 7 days apart. Trials consisted of a 1-hr cycling protocol: 30 min at 75% VO2max followed by ...
Smorawinski J - - 2005
Bed rest (BR) deconditioning causes excessive increase of exercise core body tempera-ture, while aerobic training improves exercise thermoregulation. The study was designed to determine whether 3 days of 6 degrees head-down bed rest (HDBR) affects body temperature and sweating dynamics during exercise and, if so, whether endurance training before HDBR ...
Mendel Ronald W - - 2005
OBJECTIVE: We hypothesized that creatine supplementation would interfere with normal body fluid shifts that occur during exercise in a hot environment due to its osmotic effect intracellularly. This study examined the effects of acute creatine loading (20 g/d for 5 d) on the thermoregulatory response of the body during a ...
Williams A B - - 2005
OBJECTIVES: The study compares the efficacy of two active and one passive warming interventions in healthy volunteers with induced mild hypothermia. METHODS: Eight volunteers were studied in a random order crossover design. Each volunteer was studied during re-warming from a core temperature of 35 degrees C with each of: a ...
Strachan Arthur T - - 2005
PURPOSE: The effect of serotonin (5-HT)2C receptor blockade on the thermal response and exercise performance during exercise in a warm environment was examined. METHODS: Seven endurance-trained, but not heat-acclimatized, individuals (six males and one female) performed two 40-km time trials on a static cycle ergometer in a climatic chamber maintained ...
Hasegawa Hiroshi - - 2005
The aim of the present study was to investigate the effect of wearing a cooling jacket on thermoregulatory responses and endurance exercise performance in a warm environment. Nine untrained male subjects cycled for 60 minutes at 60% Vo(2)max (Ex1) and then immediately exercised to exhaustion at 80% Vo(2)max (Ex2) in ...
Zhang Y Z - - 2005
With the purpose of finding an ideal cryoprotectant or combination of cryoprotectants in a suitable concentration for flounder (Paralichthys olivaceus) embryo cryopreservation, we tested the toxicities, at culture temperature (16 degrees C), of five most commonly used cryoprotectants-dimethyl sulfoxide (Me2SO), glycerol, methanol (MeOH), 1,2-propylene glycol (PG) and ethylene glycol (EG). ...
Orlin J R - - 2005
The diagnosis of median nerve compression is generally based upon a prolonged nerve conduction velocity although this frequently is preceded by clinical symptoms for years. The present study was designed to identify indicators for early decompression of the median nerve in patients exhibiting symptoms compatible with carpal tunnel syndrome (CTS). ...
Hsu Andrew R - - 2005
OBJECTIVE: This two-part study tested the hypotheses that the use of a new cooling device, purported to extract heat from the body core through the palm of the hand, would (a) attenuate core temperature rise during submaximal exercise in the heat, thereby suppressing exercise-associated metabolic changes, and (b) facilitate a ...
Duarte José A - - 2005
The aim of this study was to investigate the influence of ecstasy (MDMA) administration on body temperature and soleus muscle histology in exercised and non-exercised mice. Charles-River mice were distributed into four groups: Control (C), exercise (EX), MDMA treated (M), and M + EX. The treated animals received an i.p. ...
Watson Phillip - - 2005
Seven active men were recruited to examine changes in the serum concentration of S100beta, a proposed peripheral marker of blood-brain barrier permeability, following prolonged exercise in temperate (T) and warm (W) conditions. Subjects were seated immersed to the neck in water at 35.0 (0.1) degrees C (T) or 39.0 (0.1) ...
Merla A - - 2005
Skin temperature was monitored during a graded exercise to verify whether trained individuals have different skin thermoregulation from untrained ones. Eighteen subjects (10 trained; 8 untrained) were studied recording thermal videos of their skin temperature during the exercise. Training level was assessed by maximal oxygen uptake measurements. Trained individuals have ...
Buono Michael J - - 2005
Serum iron levels have been shown to decline both with fever and with strenuous exercise, leading to the supposition that the decrease might be the result of a rise in core body temperature. To evaluate this hypothesis, the serum iron response to an exercise-induced 1.5 degrees C rise in core ...
Hasegawa Hiroshi - - 2005
We have previously demonstrated a functional role of the preoptic area and anterior hypothalamus (PO/AH) in thermoregulation in freely moving rats at various temperature conditions by using microdialysis and biotelemetry methods. In the present study, we perfused tetrodotoxin (TTX) solution into the PO/AH to investigate whether this manipulation can modify ...
Purvis Alison J - - 2004
Many fabrics and clothing 'systems' have been designed to enhance heat balance and provide greater thermal comfort for the wearer. However, studies on the effects of socks have largely been ignored in clothing research. It has been suggested that the thermal state of the extremities may alter core temperature and ...
Marino Frank E - - 2004
Although evidence exists that a critical limiting temperature during exercise leads to premature fatigue secondary to a reduced central nervous system (CNS) drive to skeletal muscle, other thermoregulatory models may provide alternative explanations for limitations to exercise and heat stress in humans. This paper considers a number of mammalian species ...
Kagawa Sohei - - 2004
OBJECTIVE: To investigate an unexpectedly high initial skin CO2 pressure with a new small earlobe probe* heated to 42 degrees C containing both transcutaneous (tcPCO2) and pulse oximeter saturation (SpO2) sensors. METHODS: The probe was mounted on the ear lobe of six patients during abdominal or thoracic surgery and on ...
Laing S J - - 2005
The aim of this study was to determine the effects of prolonged exercise in hot conditions on saliva IgA (s-IgA) responses in trained cyclists. On two occasions, in random order and separated by 1 week, 12 male cyclists cycled for 2 h on a stationary ergometer at 62 (3)% V(.)O(2 ...
Gant Nicholas - - 2004
The purpose of the present study was to re-examine the relationship between deep body temperature and relative exercise intensity, during running rather than cycling (Saltin and Hermansen, 1966). Twenty male competitive and recreational distance runners, aged 22 + 0.9 years (mean +/- sx), were selected to form two groups, one ...
Scott Chris G - - 2004
INTRODUCTION: We examined the effect of prior heating, by exercise and warm-water immersion, on core cooling rates in individuals rendered mildly hypothermic by immersion in cold water. METHODS: There were seven male subjects who were randomly assigned to one of three groups: 1) seated rest for 15 min (control); 2) ...
Kim Kee-Bum - - 2004
A number of environmental and metabolic stimuli rapidly induce the expression of several highly conserved proteins such as heat shock proteins (HSPs) or stress proteins. The purpose of this study was to investigate the effects of a single bout of submaximal exercise in varying ambient temperatures on cardiac and skeletal ...
Journeay W Shane - - 2004
INTRODUCTION: The purpose of this study was to determine the effect of upright lower body positive and negative pressure (LBPP/LBNP) application on the post-exercise thermal response. It was hypothesized that the application of LBPP would decrease core temperature secondary to increases in skin blood flow (SkBF) and sweating, whereas the ...
Talawar M B - - 2004
Cobalt, nickel and zinc tris(carbohydrazide) perchlorates (CoCP, NiCP and ZnCP) as well as copper bis(carbohydrazide) perchlorate (CuCP) of desired morphology and bulk density (0.85-0.95 g/cm3) have been synthesized during this work. The synthesis was carried out by addition of the aqueous solution of cobalt/nickel/copper/zinc perchlorates to the aqueous solution of ...
Draviaraj Kingsley Paul - - 2004
PURPOSE: The purpose of this study was to assess the functional outcome after surgery for Dupuytren's contracture and the correlation between the change in the degree of deformity of the metacarpophalangeal joint (MCPJ) and the proximal interphalangeal joint (PIPJ) and the change in hand function. METHODS: Hand function in 30 ...
Layden Joseph D - - 2004
The main aim of this study was to investigate if whole body fat oxidation, after acipimox administration, during submaximal exercise in the cold, is different from that at temperate environments. Seven healthy recreationally active male subjects cycled at 70% Vo(2peak) for 60 minutes; once at 0 degrees C and once ...
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