View clinical trials related to Heat.
Filter by:Unintentional perioperative hypothermia is a common occurrence. One of the recommendations of the guidelines to prevent hypothermia is the use of active warmers. It is known that low-flow anesthesia protects from hypothermia compared to high-flow anesthesia. In this study, we aimed to compare the efficacy of using active air blown heater and resistive heater in preventing hypothermia in patients with low flow and high flow inhalation anesthesia
The goal of this repeated measures study is to evaluate acute work rate adjustments during high-intensity interval training (HIIT) in a hot and temperate environment in healthy and active adults when using target heart rate to prescribe the exercise intensity. The main questions it aims to answer are: - Will HIIT based on target heart rate in a hot environment result in increased cardiovascular (i.e., elevated recovery HR) and thermal strain compared to HIIT in a temperate environment? - Will work rate be lowered to a greater extent during HIIT in a hot environment compared to a temperate environment in order to maintain target heart rate? - Will maximal aerobic capacity (V̇O2max) decrease to a greater extent after HIIT in the heat compared to a temperate environment? Procedures: Participants will complete 5 trials on a cycle ergometer. Trial 1 (Control Visit): Participants (n = 7) will have their maximal heart rate and V̇O2max measured in a temperate environment (~22 °C, 40% RH). Experimental Trials 2-5: The order of the trials will be counterbalanced and randomly assigned to participants. - 15TEMP: Participants will cycle at 70% of their maximum heart rate for 8 minutes as a warm-up, followed by one round of HIIT. The HIIT protocol consists of 4 minutes at 90% of maximum heart rate followed by 3 minutes at 70% of maximum heart rate, totaling 15 minutes, in a temperate environment (~22 °C, 40% RH). After the HIIT session, a graded exercise test will measure V̇O2max. - 15HEAT: Similar to 15TEMP, but participants will perform the HIIT protocol in a hot environment (~35 °C, 40% RH). - 43TEMP: Participants will cycle at 70% of their maximum heart rate for 8 minutes as a warm-up, followed by the HIIT protocol repeated four times (4 minutes at 90% of maximum heart rate and 3 minutes at 70% of maximum heart rate), totaling 43 minutes, in a temperate environment (~22 °C, 40% RH). - 43HEAT: Similar to 43TEMP, but participants will perform the HIIT protocol in a hot environment (~35 °C, 40% RH).
Military personnel are called upon to serve in hot, dry or humid climates, which places great demands on their ability to tolerate heat. Induced heat stress can impair performance and lead to pathologies. Faced with the challenges of global warming, this issue is becoming increasingly important in the practice of sport. While hyperthermia is known to impair endurance performance, the underlying thermophysiological responses and regulatory mechanisms during prolonged exercise remain poorly understood. The effects of hyperthermia on mental performance raise questions about the degradation of interoceptive capacities and the deleterious impact on behavioral regulation, an important component of thermal risk management in ultra-endurance exercise. What's more, despite the muscular and hydromineral consequences (rhabdomyolysis, renal failure, dehydration) of prolonged exercise, few data are available on recovery kinetics. A better understanding of the factors conditioning recovery quality could help limit the deleterious consequences of ultra-endurance exercise.
Military personnel and athletes have a very high energy expenditure which is increased during certain key periods (intense training, competition and mission). Compensating for this expenditure through food can be complicated by physiological ingestive limits and logistical and organizational constraints (number of meals, availability of food), which leads these populations to regularly experience energy deficit situations (intake below requirements), which could alter physical and cognitive performance and major physiological functions. Among the many constraints to which military personnel and athletes are exposed to (stress, sleep deprivation, travel, etc.) that can increase the risk of energy deficits, the impact of thermal environmental constraints is not well known. The seasonal impact and travel to countries with very different thermal environments can lead these populations to experience cold and hot conditions for long periods. Understanding how heat and cold exposure modifies appetite and energy intake therefore appears to be of great importance. The hypothesis of this study is that a 24 h heat exposure would produce a rapid and long-lasting anorexigenic action impacting energy intake, while a cold exposure would produce the opposite effect (orexigenic action).
This study investigates the modification of the local-to-global connectivity pattern in response to experimental heat pain. Transcranial magnetic stimulation (TMS) will be applied to elicit electroencephalography (EEG) responses in healthy volunteers. The TMS-evoked potentials (TEPs) will be recorded and serve as a reflection of cortical reactivity to TMS. A thermal cutaneous heat stimulus will induce painful sensations.
The purpose of the project is to estimate the air temperature in the lungs after a change from room temperature (25℃) to an environment with a constant temperature of 88-92℃ in resp. lung-healthy persons and persons with bronchiectasis.
In 2016, it was estimated that nearly 1 billion people worldwide were affected by a mental or addictive disorder, and were associated with considerable excess mortality. Acute heat therapy sessions (e.g. whole-body heating or foot immersions) have been shown to improve symptoms in individuals diagnosed with common mental health illness such as major depressive disorders and reduce anxiety. This study will assess the impact of an at-home 8-week lower-limb immersion in hot water on symptom severity in patients diagnosed with major depressive disorder, generalized anxiety disorder, and PTSD.
This study is a double blinded randomized active placebo controlled trial in subjects with chronic low back pain. The trial compares pain relief by a device that delivered high level pulsed heat (45 °C) to pain relief delivered by a steady heat lower temperature device (37 °C). The hypothesis is that the high temperature pulsed heat device will produce significantly better pain relief as compared to the lower level steady heat device. The secondary hypothesis is that pain relief will occur faster in the high pulsed heat device as compared to the control device.
This study had three aims: 1. To determine the impact of consecutive days of exercise on thermoregulation and cardiovascular strain. 2. To determine the efficacy of a hand cooling device to cool individuals throughout a heat acclimation period. 3. To assess the maintenance of thermoregulatory and cardiovascular adaptations derived from heat acclimation during a 25-day intermittent exercise-heat exposure protocol.
Investigators propose an intervention trial of a comprehensive education and treatment bundle designed to reduce morbidity and mortality associated with heat-related illness for low resource settings. Two set of interventions will be developed each for emergency department and for community/home. These interventions will be developed by an internal expert group and will be customized and implemented at the home and emergency department (ED) levels, will include evidence-based educational training guidelines for ED health providers as well as educational messages targeting home and community in Karachi, Pakistan.