What do athletes drink during competitive sporting activities?

Although expert groups have developed guidelines for fluid intake during sports, there is debate about their real-world application. We reviewed the literature on self-selected hydration strategies during sporting competitions to determine what is apparently practical and valued by athletes. We found few studies of drinking practices involving elite or highly competitive athletes, even in popular [...]

By | 2017-05-21T03:14:19+00:00 julio 15th, 2013|Body water content; body composition, Documentos científicos, Exercise and sport|Comentarios desactivados en What do athletes drink during competitive sporting activities?

Effect of exercise-induced dehydration on endurance performance: evaluating the impact of exercise protocols on outcomes using a meta-analytic procedure.

OBJECTIVE: It is purported that exercise-induced dehydration (EID), especially if ≥ 2% body weight, impairs endurance performance (EP). Field research shows that athletes can achieve outstanding EP while dehydrated > 2% bodyweight. Using the meta-analytic procedure, this study compared the findings of laboratory-based studies that examined the impact of EID upon EP using either ecologically [...]

By | 2017-05-21T03:14:21+00:00 julio 15th, 2013|Documentos científicos, Exercise and sport, Physical performance|Comentarios desactivados en Effect of exercise-induced dehydration on endurance performance: evaluating the impact of exercise protocols on outcomes using a meta-analytic procedure.

Significant and serious dehydration does not affect skeletal muscle cramp threshold frequency.

OBJECTIVE: Many clinicians believe that exercise-associated muscle cramps (EAMC) occur because of dehydration. Experimental research supporting this theory is lacking. Mild hypohydration (3% body mass loss) does not alter threshold frequency (TF), a measure of cramp susceptibility, when fatigue and exercise intensity are controlled. No experimental research has examined TF following significant (3-5% body mass [...]

By | 2017-05-21T03:14:22+00:00 julio 15th, 2013|Documentos científicos, Hydration status: effects on physiology and metabolism|Comentarios desactivados en Significant and serious dehydration does not affect skeletal muscle cramp threshold frequency.

Effect of varying the concentrations of carbohydrate and milk protein in rehydration solutions ingested after exercise in the heat.

The present study investigated the relationship between the milk protein content of a rehydration solution and fluid balance after exercise-induced dehydration. On three occasions, eight healthy males were dehydrated to an identical degree of body mass loss (BML, approximately 1•8 %) by intermittent cycling in the heat, rehydrating with 150 % of their BML over [...]

By | 2017-05-21T03:15:30+00:00 junio 20th, 2013|Body water content; body composition, Documentos científicos, Regulation of water and electrolyte balance, Water balance|Comentarios desactivados en Effect of varying the concentrations of carbohydrate and milk protein in rehydration solutions ingested after exercise in the heat.

Effect of preexercise soup ingestion on water intake and fluid balance during exercise in the heat.

Purpose: To determine whether chicken noodle soup before exercise increases ad libitum water intake, fluid balance, and physical and cognitive performance compared with water. Methods: Nine trained men (age 25 ± 3 yr, VO2peak 54.2 ± 5.1 ml • kg-1 • min-1; M ± SD) performed cycle exercise in the heat (wet bulb globe temperature [...]

By | 2017-05-21T03:15:32+00:00 junio 20th, 2013|Documentos científicos, Exercise and sport, Hydration status: effects on physiology and metabolism, Physical performance|Comentarios desactivados en Effect of preexercise soup ingestion on water intake and fluid balance during exercise in the heat.

Total body water and its compartments are not affected by ingesting a moderate dose of caffeine in healthy young adult males.

Acute and chronic caffeine intakes have no impact on hydration status (R.J. Maughan and J. Griffin, J. Hum. Nutr. Diet. 16(6): 411-420, 2003), although no research has been conducted to analyze the effects using dilution techniques on total-body water (TBW) and its compartments. Therefore, the aim of this study was to investigate the effects of [...]

By | 2017-05-21T03:15:33+00:00 junio 20th, 2013|Assessment methodologies, Caffeine and other diuretics, Documentos científicos, Hydration status of population groups|Comentarios desactivados en Total body water and its compartments are not affected by ingesting a moderate dose of caffeine in healthy young adult males.

Isokinetic and isometric muscle function of the knee extensors and flexors during simulated soccer activity: Effect of exercise and dehydration

This study investigated the influence of dehydration during soccer-type intermittent exercise on isokinetic and isometric muscle function. Eight soccer players performed two 90-min high-intensity intermittent shuttle-running trials without (NF) or with (FL) fluid ingestion (5 ml · kg(-1) before and 2 ml · kg(-1) every 15 min). Isokinetic and isometric strength and muscular power of knee flexors and knee extensors were measured [...]

By | 2017-05-21T03:15:34+00:00 mayo 17th, 2013|Documentos científicos, Exercise and sport, Physical performance|Comentarios desactivados en Isokinetic and isometric muscle function of the knee extensors and flexors during simulated soccer activity: Effect of exercise and dehydration

Case Study: Nutrition and Hydration Status During 4254km of Running Over 78 Consecutive Days

The aims of this study were to assess the dietary intake and monitor self-reported recovery quality and clinical symptomology of a male ultra-endurance runner who completed a multi-day ultra-endurance running challenge covering 4254km from North Scotland to the Moroccan Sahara desert over 78 consecutive days. Food and fluid intakes were recorded and analysed through dietary [...]

By | 2017-05-21T03:16:05+00:00 mayo 16th, 2013|Documentos científicos, Exercise and sport, Hydration status of population groups, Physical performance|Comentarios desactivados en Case Study: Nutrition and Hydration Status During 4254km of Running Over 78 Consecutive Days

The Influence of Rehydration Mode Following Exercise Dehydration on Cardiovascular Function

Our purpose was to compare common modes of rehydration (REHY) on cardiovascular and fluid regulation recovery following exercise dehydration (EXDE). Twelve non-heat-acclimatized trained subjects (23±4y, 81.3±3.7kg, 180±6cm, 56.9±4.4mLminkg VO2max, 7.8±3.0 % body fat) completed 20-h fluid restriction and 2-h EXDE to -4% body mass, then were rehydrated to -2% body mass in a randomized, cross-over [...]

By | 2017-05-21T03:16:06+00:00 mayo 16th, 2013|Assessment methodologies, Cardiovascular disease, cardiovascular function, Documentos científicos, Hydration status of population groups|Comentarios desactivados en The Influence of Rehydration Mode Following Exercise Dehydration on Cardiovascular Function

Dehydration and acute weight gain in mixed martial arts fighters before competition

The purpose of this study was to characterize the magnitude of acute weight gain (AWG) and dehydration in mixed martial arts (MMA) fighters before competition. Urinary measures of hydration status and body mass were determined approximately 24 hours before and then again approximately 2 hours before competition in 40 MMA fighters (mean ± SE, age: [...]

By | 2017-05-21T03:16:07+00:00 mayo 16th, 2013|Documentos científicos, Exercise and sport, Hydration status of population groups|Comentarios desactivados en Dehydration and acute weight gain in mixed martial arts fighters before competition