Conference on “Multidisciplinary approaches to nutritional problems”. Symposium on “Performance, exercise and health”. Hydration, fluids and performance.

Sweat evaporation can be a key thermoregulatory mechanism and it causes a loss of water from all compartments of the body. Hypohydration can also develop with restricted fluid intake or with intake of diuretics. Hypohydration can affect physical and/or mental performance and/or have implications for dietary recommendations. A variety of different types and modes of [...]

By |2013-01-31T18:33:08+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

Effect of hydration state on resistance exercise-induced endocrine markers of anabolism, catabolism, and metabolism.

Hypohydration (decreased total body water) exacerbates the catabolic hormonal response to endurance exercise with unclear effects on anabolic hormones. Limited research exists that evaluates the effect of hypohydration on endocrine responses to resistance exercise; this work merits attention as the acute postexercise hormonal environment potently modulates resistance training adaptations. The purpose of this study was [...]

By |2013-01-31T18:33:08+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

Hydration recommendations for sport 2008.

Fluid replacement remains an important strategy for preserving exercise performance as dehydration in excess of 2% of body weight consistently impairs aerobic exercise performance. Too much of a good thing, however, can have negative health consequences as persistent drinking in excess of sweating rate can induce symptomatic exercise associated hyponatremia. This short review highlights new [...]

By |2013-01-31T18:33:08+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

Exercise, heat, hydration and the brain.

The performance of both physical and mental tasks can be adversely affected by heat and by dehydration. There are well-recognized effects of heat and hydration status on the cardiovascular and thermoregulatory systems that can account for the decreased performance and increased sensation of effort that are experienced in the heat. Provision of fluids of appropriate [...]

By |2013-01-31T18:33:08+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

Heat acclimatization and hydration status of American football players during initial summer workouts.

This investigation evaluated the new National Collegiate Athletic Association model of heat acclimatization for football players using physiological, psychological, fluid balance, anthropometric, and nutritional variables. Eleven football players (20 +/- 1 year, 1.88 +/- 0.05 m, and 115.36 +/- 18.85 kg) from a Division I football team were observed for the first 8 days of [...]

By |2013-01-31T18:33:07+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

The combined effects of hydration and exercise heat stress on choice reaction time.

The purpose of this investigation was to examine the combined effects of hydration and exercise heat stress on choice reaction time. On three separate occasions eight male subjects performed cycle exercise at approximately 70% of peak power output in warm, humid conditions (31 degrees C, 63% relative humidity) for a maximum of 90 min or [...]

By |2013-01-31T18:33:07+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

Core temperature and hydration status during an Ironman triathlon.

BACKGROUND: Numerous laboratory based studies have documented that aggressive hydration strategies (approximately 1-2 litres/h) are required to minimise a rise in core temperature and minimise the deleterious effects of hyperthermia on performance. However, field data on the relations between hydration level, core body temperature, and performance are rare. OBJECTIVE: To measure core temperature (Tcore) in [...]

By |2013-01-31T18:33:07+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

Hydration status and water turnover of dogsled drivers during an endurance sled dog event in the arctic.

BJECTIVES: To determine changes in common urinary markers of hydration maintained by the drivers (mushers) during a wilderness endurance event in the arctic and to determine water turnover in this select group of individuals. STUDY DESIGN: During this descriptive study, data was systematically collected on hydration, water turnover, changes in resting and exercise heart rate, [...]

By |2013-01-31T18:33:07+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

Strategies for hydration and energy provision during soccer-specific exercise.

The aim of the present study was to investigate the effect of manipulating the provision of sports drink during soccer-specific exercise on metabolism and performance. Soccer players (N = 12) performed a soccer-specific protocol on three occasions. On two, 7 mL/kg carbohydrate-electrolyte (CHOv) or placebo (PLA) solutions were ingested at 0 and 45 min. On [...]

By |2013-01-31T18:33:07+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

The influence of water versus carbohydrate-electrolyte hydration on blood components during a 16-km military march.

The purpose of this study was to identify and to compare the effects of ingesting liquids during a 16-km military march under moderate environmental conditions. Twenty-six volunteer male subjects were randomly divided into two groups. Group GW received water (n=12), and group GP received an electrolytic carbohydrate solution (n=14). Blood and urine samples were obtained [...]

By |2013-01-31T18:32:29+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments