Hypohydration and acute thermal stress affect mood state but not cognition or dynamic postural balance.

Equivocal findings have been reported in the few studies that examined the impact of ambient temperature (T a) and hypohydration on cognition and dynamic balance. The purpose of this study was to determine the impact of acute exposure to a range of ambient temperatures (T a 10-40 °C) in euhydration (EUH) and hypohydration (HYP) states on [...]

By |2017-05-21T03:16:36+00:00abril 26th, 2013|Documentos científicos, Environmental conditions, Mental performance, Thermoregulation|Comentarios desactivados en Hypohydration and acute thermal stress affect mood state but not cognition or dynamic postural balance.

The effect of prescribed fluid consumption on physiology and work behavior of wildfire fighters.

The purpose of this study was to examine 1) wildfire fighters' ability to consume the prescribed fluid volume (1200 mL h(-1)), 2) the effect of fluid intake on plasma sodium and hydration, and 3) the effect of fluid intake on firefighters' heart rate, core temperature and activity during emergency suppression shifts. METHODS: Thirty-four firefighters were [...]

By |2017-05-21T03:16:36+00:00abril 26th, 2013|Documentos científicos, Hydration status: effects on physiology and metabolism|Comentarios desactivados en The effect of prescribed fluid consumption on physiology and work behavior of wildfire fighters.

The effects of dehydration, moderate alcohol consumption, and rehydration on cognitive functions.

This study investigated the impact of mild-moderate dehydration on alcohol-induced deteriorations in cognitive functions. Sixteen healthy males participated in a single-blind, placebo-controlled cross-over design study involving 4 experimental trials (separated by ≥7 d). In each trial, participants were dehydrated by 2.5% body mass through exercise. After 1 h recovery in a thermo-neutral environment (22 ± 2 °C, 60-70% relative humidity) [...]

By |2017-05-21T03:16:36+00:00abril 26th, 2013|Documentos científicos, Hydration status of population groups, Mental performance|Comentarios desactivados en The effects of dehydration, moderate alcohol consumption, and rehydration on cognitive functions.

Methods for assessing the effects of dehydration on cognitive function.

Studying the effects of dehydration on cognitive function presents a variety of unique and difficult challenges to investigators. These challenges, which are addressed in this article, can be divided into three general categories: 1) choosing an appropriate method of generating a consistent level of dehydration; 2) determining and effectively employing appropriate and sensitive measures of [...]

By |2017-05-21T03:16:37+00:00enero 31st, 2013|Assessment methodologies, Documentos científicos|Comentarios desactivados en Methods for assessing the effects of dehydration on cognitive function.

Hydration for recreational sport and physical activity.

This review presents recommendations for fluid needs and hydration assessment for recreational activity. Fluid needs are based on sweat losses, dependent on intensity and duration of the activity, and will vary among individuals. Prolonged aerobic activity is adversely influenced by dehydration, and heat exposure will magnify this effect. Fluid needs predicted for running 5-42 km at [...]

By |2017-05-21T03:16:37+00:00enero 31st, 2013|Documentos científicos, Exercise and sport|Comentarios desactivados en Hydration for recreational sport and physical activity.

Thirst and hydration status in everyday life.

Water is an essential nutrient for all persons; thus, maintaining a chronic state of optimal hydration is recognized to provide health benefits. Fluid balance is maintained via thirst, a feedback-controlled variable, regulated acutely by central and peripheral mechanisms. However, voluntary drinking is also a behavior influenced by numerous social and psychological cues. Therefore, whether "thirst-guided" [...]

By |2017-05-21T03:16:36+00:00enero 31st, 2013|Documentos científicos, Hydration status: effects on physiology and metabolism|Comentarios desactivados en Thirst and hydration status in everyday life.

Ad Libitum Fluid Intake does not Prevent Dehydration in Sub-optimally Hydrated Young Soccer Players during a Training Session of a Summer Camp.

There is a lack of studies concerning hydration status of young athletes exercising in the heat. PURPOSE: To assess pre-exercise hydration status in young soccer players during a summer sports camp and to evaluate body water balance after soccer training sessions. METHODS: Initial hydration status was assessed in 107 young male soccer players (age: 11-16 [...]

By |2017-05-21T03:16:56+00:00enero 31st, 2013|Documentos científicos, Exercise and sport|Comentarios desactivados en Ad Libitum Fluid Intake does not Prevent Dehydration in Sub-optimally Hydrated Young Soccer Players during a Training Session of a Summer Camp.

The effect of acute fluid consumption and hydration status on percent body fat and minimum wrestling weight.

ABSTRACT: The weight certification program for wrestling requires a urine specific gravity (Usg) < 1.020. However, the effect of acute rehydration on percent body fat (%BF) and minimum wrestling weight (MWW) is largely unknown. We examined the effect of acute fluid consumption on %BF and MWW. Twenty-five male subjects (18-22 y) were tested in a [...]

By |2017-05-21T03:16:56+00:00enero 31st, 2013|Body water content; body composition, Documentos científicos|Comentarios desactivados en The effect of acute fluid consumption and hydration status on percent body fat and minimum wrestling weight.

Dehydration and endurance performance in competitive athletes.

The field of research examining the link between dehydration and endurance performance is at the dawn of a new era. This article reviews the latest findings describing the relationship between exercise-induced dehydration and endurance performance and provides the knowledge necessary for competitive, endurance-trained athletes to develop a winning hydration strategy. Acute, pre-exercise body weight loss [...]

By |2017-05-21T03:16:37+00:00enero 31st, 2013|Assessment methodologies, Documentos científicos|Comentarios desactivados en Dehydration and endurance performance in competitive athletes.