View clinical trials related to Cold Exposure.
Filter by:Exposure of the human body to cold water triggers numerous beneficial physiological changes. The study aimed to assess the impact of regular winter swimming on blood morphological, rheological, and biochemical indicators and activity of antioxidant enzymes in males. The study includes winter swimmers and a control group. Blood samples were taken twice - before the start (November) of the winter swimming season and after its end (March). The average duration of ice water baths was 3-5 minutes, with a minimum frequency of once a week. The water temperature during the swimming did not exceed 10°C, approaching 0°C during the winter period.
The main objective of the study is to evaluate the physiological-biochemical effects of physical training under artificially altered climatic conditions (using a hypoxic thermoclimatic chamber) in particular to determine the effect of such training on exercise capacity and physiological response, including the effect of training in high-performance athletes. The study will evaluate the effects of physical training and the simultaneous application of hypoxia and heat/cold on aerobic and anaerobic capacity and the physiological response of the human body. The aim of the study is to find the most favourable environmental conditions for physical training in order to maximise physical performance.
The Wim Hof Method is a multi-disciplinary approach to physical and mental well-being combining cold exposure, breathing exercises, and meditation. This study evaluated the effects of a 15-day WHM intervention on cardiovascular parameters at rest and during a cold pressor test, as well as on various psychological parameters.
This clinical trial will assess the whether fish oil supplementation can modulate brown fat activation, shivering, thermal comfort and skin blood flow during cold exposure.
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).
The goal of this clinical trial was to identify if duration of acute calorie restriction (CR)/fasting or combination CR with cold stimuli have any effects on mental and physical health-related markers, and to clarify if different fasting strategies have any effect on cognitive and motor functioning efficiency in different genders. The main questions it aims to answer were: - Does fasting duration have any effect on fasting evoked responses? - Does cold interventions can modulate fasting evoked responses? - Does sex have any effect on acute fasting evoked responses? For the first part, participants were randomly classified into 4 groups: two experimental groups: 2-days of CR (0 kcal diet) and 6-days of CR (0 kcal diet), and two control groups: 2-days or 6-days usual diet. For the second part, participants were randomly assigned to undergo the following conditions: 2-days of CR with two 10-min whole-body cold-water immersions on separate days, 2-days of CR without cold-water immersion, 2-days without CR with two 10-min whole-body cold-water immersions on separate days, or 2-days of the usual diet without cold-water immersion in a randomized crossover fashion. Changes in anthropometric characteristics, perceived stress, metabolism, overall health (total blood count, sex hormones, etc.), psycho-emotional state, cognitive and motor functions were examined.
In cold weather environments, blood flow to the extremities is significantly reduced, which severely impairs hand function and induces thermal discomfort. Prolonged or repeated cold exposure elicits an adaptive habituation response that is characterized by blunted skin vasoconstriction and thus may be an effective strategy to improve peripheral perfusion, reduce thermal discomfort, and maintain hand function during cold weather military operations. Since mission conditions often involve low ambient temperatures, countermeasures that reduce cold-induced decrements in hand function and thermal comfort are important to enhance Warfighter readiness in cold weather battlefield environments. The goals of this study are to 1) evaluate the effectiveness of cold habituation in improving skin blood flow, hand function, and thermal comfort during cold exposure and 2) identify the mechanisms that contribute to improvements in skin blood flow following habituation.
Cold-induced thermogenesis, or the increase in energy expenditure upon cold exposure, indicates metabolic stress, as such, cold-induced thermogenesis may signal an appropriate stimulus to improve metabolic health. Cold acclimation may alter cold-induced thermogenesis due to changes in (non)shivering thermogenesis and blood flow. The main aim of this research is to compare the energy expenditure responses, during a standardised cold stress (~ 9°C air temperature, maximum 1 hour), of Siberian adults with Western European adults. The subjects will be individually matched for age, sex, body mass and height. It was hypothesised that cold-induced thermogenesis will be reduced in the Siberian population.
This study is an 8 week weight loss intervention with 3 randomly assigned groups: DIET, cold exposure (CE), and DIET+CE. The study will be a total of 13 weeks. All participants will undergo a screening session, two experimental sessions at baseline and two experimental sessions after the intervention. There will be a control (ambient) experimental session and a cold exposure experimental session These will be done in a randomized order both before and after the intervention. Therefore, a total of 5 lab visits will be required for all participants regardless of group outside of their assigned group intervention. Participants in the CE and DIET+CE groups will report to the laboratory every 2nd day for the 8 week intervention to undergo cold exposure as outlined below. The DIET and DIET+CE groups will have a weekly nutritional consultation at the lab as well as a weekly check-in with the nutritionist via text, phone, or email. Participants will be randomly assigned a group after completing the screening session and prior to the experimental session.
Naval Special Warfare (NSW) operators are exposed to a variety of extreme environmental conditions and intense physical demands. In addition to breathing high pressure gases at depth, prolonged cold water immersion and inadequate recovery from sustained physical exertion negatively impact individual and team performance. Biotechnologies that could mitigate the effects of cold as well as support physical recovery represent a significant unmet need for the NSW operational community. Oxytocin (OT) has a wide range of actions both locally in the brain and peripherally in the body including skeletal muscle. These peripheral effects can be mediated by classic ligand-receptor activation given the abundant expression of the oxytocin receptor in peripheral tissues, along with local expression of OT in peripheral tissues where it is likely to act in an autocrine manner. Exogenous OT via intranasal administration is FDA Investigational New Drug (IND)-approved and has been demonstrated as an easy and safe method to increase circulating OT concentrations that may augment actions on peripheral tissues.