Overhydration Body water is tightly regulated to ensure we have just enough, and varies by no more than 1% daily in normal, healthy people (around 250-500ml). When body water decreases (e.g. due to sweating) or blood sodium levels rise, thirst is stimulated and the kidneys conserve fluid. Most people respond by drinking slightly [...]

Should thirst be your guide? For most people, thirst is an adequate stimulus to drink and results in sufficient fluid intake. However, many healthy people are chronically dehydrated, so thirst is evidently not a sufficient stimulus for these individuals.

Climate and Environment Living, working and exercising in challenging climatic or environmental conditions influences our requirements for water due to changes in water losses from respiration and sweating.

Hydration & Diet Achieving an adequate intake of water depends on much more than what you choose to drink, as many foods contribute to water intakes too. Taking a total diet approach helps to ensure that you meet your water needs by including a variety of sources. [...]

Hydration and chronic diseases Chronic mild dehydration can be present in many individuals failing to fulfil daily water requirements, but it has been shown to be a common condition in some population groups, including the elderly and those who participate in physical activity in warm environments. In this new issue the effects of [...]

Hydration in winter In cold weather conditions, body fluid losses can be as high as those in hot climates because additional water losses occur as a result of increased urine and respiratory water losses.  In this new issue the additional water losses during cold weather are reviewed, and practical tips for staying hydrated [...]

Hydration while studying Adequate hydration is important for optimal functioning of the brain. Dehydration can adversely influence cognitive function, and this is important when considering tasks such as studying. In this new issue the consequences of dehydration on cognitive performance are reviewed, and practical tips for staying hydrated when facing cognitive tasks are provided. [...]

Hydration in the workplace Hydration in the work place is a specific concern because consequences of dehydration, even mild, can affect productivity, safety, cost, and morale. In this new issue the consequences of dehydration on physical and cognitive work capacity are described, and practical tips about staying hydrated in the work place are provided. [...]

Measuring hydration status Evaluation of hydration status is not easy, as during daily activities or exercise, fluid compartments are constantly fluctuating, so measuring a single body fluid is insufficient to provide valid information about total body water. In this new issue we present some of the methods used to measure hydration status and [...]