Impact of different climatic conditions on peak core temperature of elite athletes during exercise in the heat: a Thermo Tokyo simulation study

Objectives To evaluate how separate and combined climatic parameters affect peak core temperature during exercise in the heat using computer simulations fed with individual data. Methods The impact of eight environmental conditions on rectal temperature (Tre) was determined for exercise under heat stress using the Fiala-thermal-Physiology-and...

Performance and thermoregulation of Dutch Olympic and Paralympic athletes exercising in the heat: Rationale and design of the Thermo Tokyo study: The journal Temperature toolbox

The environmental conditions during the Tokyo Olympic and Paralympic Games are expected to be challenging, which increases the risk for participating athletes to develop heat-related illnesses and experience performance loss. To allow safe and optimal exercise performance of Dutch elite athletes, the Thermo Tokyo study aimed to determine...

Evaluation of models to estimate thermal load of clothing and equipment [V1605]

Exposure to challenging thermal environments such as jungle, desert, arctic, maritime, coastal shores and mountains can impose hazardous working conditions to NATO ground forces. This report describes a) an overview of models on how to estimate the thermal load from clothing and equipment, b) a methodology on how to incorporate the effects of...

Core Temperature Estimation for a Cylindrical Cell Battery Module

Lithium ion (Li-ion) batteries in electric vehicle (EV) applications must operate within a narrow temperature range to ensure safety, performance and longevity. Hence, advanced thermal management strategies should have access to internal cell temperatures in a battery pack. In real world application, surface temperatures can be measured, but it...

Comparison of two telemetric intestinal temperature devices with rectal temperature during exercise

OBJECTIVE: The discomfort caused by rectal probes and esophageal probes for the estimation of body core temperature has triggered the development of gastrointestinal (GI) capsules that are easily accepted by athletes and workers due to their non-invasive characteristics. We compare two new GI capsule devices with rectal temperature during cycle...

Pacing strategies during exercise in the heat

Telemetry pill versus rectal and esophageal temperature during extreme rates of exercise-induced core temperature change

Core temperature measurement with an ingestible telemetry pill has been scarcely investigated during extreme rates of temperature change, induced by short high-intensity exercise in the heat. Therefore, nine participants performed a protocol of rest, (sub)maximal cycling and recovery at 30 °C. The pill temperature (T pill) was compared with the...

Non-invasive continuous core temperature measurement by zero heat flux

Reliable continuous core temperature measurement is of major importance for monitoring patients. The zero heat flux method (ZHF) can potentially fulfil the requirements of non-invasiveness, reliability and short delay time that current measurement methods lack. The purpose of this study was to determine the performance of a new ZHF device on the...

Optimising the acquisition and retention of heat acclimation

Heat acclimation (HA) often starts in a moderately hot environment to prevent thermal overload and stops immediately prior to athletic activities. The aims of this study were 1) to establish whether acclimation to a moderately hot climate is sufficient to provide full acclimation for extreme heat and 2) to investigate the physiological responses...

Temperature pill tracks rectal but not esophageal temperature during short high intensity exercise

Heat strain in elderly during heat waves in the Netherland

It is well documented that high ambient temperatures causes an increase in morbidity and mortality. Particularly elderly of over 75 years old are vulnerable for heat stress (Kovats and Hajat, 2008). Mackenbach et al. (1997) showed that an additional 10 elderly die every week in Dutch nursery homes when ambient temperatures are between 25 and 30...

Real-Time Physiological and Psycho-Physiological Status Monitoring

Dismounted warfighting groups are increasingly recognizing the benefits of knowing the medical status information that body-worn computerized physiological sensor systems can provide. This report on real-time physiological and psycho-physiological status monitoring reviews: a) Physiological monitoring system architectures, methods for managing...

Infrared tympanic temperature and ear canal morphology

Several publications indicate that the infrared tympanic temperature (IRTT) underestimates the core temperature of the body when the ear canal is long, curvy and narrow. In order to quantify these observations, a study was performed in 10 subjects. The IRTT was determined and compared to the oesophageal temperature (Tes), taken as the reference...

Reliability of an infrared forehead skin thermometer for core temperature measurements

The SensorTouch thermometer performs an infrared measurement of the skin temperature above the Superficial Temporal Artery (STA). This study evaluates the validity and the accuracy of the SensorTouch thermometer. Two experiments were performed in which the body temperature was measured with a rectal sensor, with an oesophageal sensor and with...

Aandachtspunten voor een optimale voorbereiding : Inspanning in de warmte (Exercise in a hot environment: Points of special interest for an optimal preparation)

An elevated core temperature is one of the underlying factors responsible for a decrease of performance during exercise in a hot environment. Therefore, strategies that minimise the rise in core temperature during exercise in the heat are likely to be effective in enhancing exercise performance. There are several strategies to minimise this...

Aandachtspunten voor een optimale voorbereiding: Inspanning in de warmte (Exercise in a hot environment: Strategies for an optimal preparation)

One of the underlying factors responsible for performance decrement during exercise in a hot environment appears to be an elevated core temperature. For this reason, strategies that minimise the rise in core temperature during exercise in the heat are likely to be effective in enhancing exercise performance. There are several strategies to...

Physiological criteria for functioning of hands in the cold

Hands are important instruments in daily life. Without hands man is hardly able to function independently. Proper functioning of the hands is determined by several physiological parameters. These physiological parameters in turn are influenced by environmental factors. In this view of the literature, physiological processes in manual dexterity...

Simulation of hand cooling due to touching cold materials

A simple analytical model has been developed to simulate the cooling of the hands due to touching various types of cold material. The model consisted of a slab of tissue, covered on both sides with skin. The only active mechanism was the skin blood flow. The blood flow was controlled by body core temperature, mean skin temperature, and local...