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.

Effects of a competitive wrestling season on body composition, endocrine markers, and anaerobic exercise performance in NCAA collegiate wrestlers.

Few data exist examining the body composition, endocrine, and anaerobic exercise performance changes over a competitive wrestling season. Eighteen NCAA wrestlers were tested for endocrine markers, body composition, hydration, grip strength, and power on four occasions: prior to pre-season training (T1); after pre-season training 3 days prior to the first seasonal meet (T2); mid-season one [...]

By | 2017-05-21T03:14:23+00:00 junio 20th, 2013|Body water content; body composition, Documentos científicos, Exercise and sport|Comentarios desactivados en Effects of a competitive wrestling season on body composition, endocrine markers, and anaerobic exercise performance in NCAA collegiate wrestlers.

Evaluation of erythrocyte deformability in subjects with sickle cell trait during a soccer game: effect of hydration ad libitum.

This study compared erythrocyte changes between a group of subjects with sickle cell trait (SCT) and controls (subjects without hemoglobinopathy) during a soccer game in two conditions: with and without hydration. Erythrocyte deformability of  subjects was assessed by the coefficient of erythrocyte rigidity (Tk) which was calculated before and after football match. Our results showed [...]

By | 2017-05-21T03:14:23+00:00 junio 20th, 2013|Documentos científicos, Exercise and sport, Hydration and health|Comentarios desactivados en Evaluation of erythrocyte deformability in subjects with sickle cell trait during a soccer game: effect of hydration ad libitum.

Fluid and electrolyte balance during two different pre-season training sessions in elite rugby union players.

The purpose of this study was to compare fluid balance between a resistance and aerobic training session, in elite rugby players. It is hypothesised that resistance exercise will result in a higher prevalence of over-drinking whereas during the aerobic session under-drinking will be more prevalent.As with previous fluid balance studies, this was an observational study. [...]

By | 2017-05-21T03:15:29+00:00 junio 20th, 2013|Documentos científicos, Exercise and sport, Physical performance|Comentarios desactivados en Fluid and electrolyte balance during two different pre-season training sessions in elite rugby union players.

Effects of carbohydrate-hydration strategies on glucose metabolism, sprint performance and hydration during a soccer match simulation in recreational players.

OBJECTIVES: This study compared the effects of three carbohydrate-hydration strategies on blood glucose concentration, exercise performance and hydration status throughout simulated soccer match-play. DESIGN: A randomized, double-blind and cross-over study design was employed. METHODS: After familiarization, 14 recreational soccer players completed the soccer match simulation on three separate occasions. Participants consumed equal volumes of 9.6% [...]

By | 2017-05-21T03:15:30+00:00 junio 20th, 2013|Assessment methodologies, Documentos científicos, Exercise and sport, Physical performance|Comentarios desactivados en Effects of carbohydrate-hydration strategies on glucose metabolism, sprint performance and hydration during a soccer match simulation in recreational players.

Sports nutrition needs: before, during, and after exercise.

This article discusses how athletes should properly fuel their bodies before, during, and after exercise to maximize athletic performance. Emphasis is placed on hydration status and glycogen stores being maintained above deficits that negatively affect sport performance. Timing of nutrient intake is as important as composition. http://www.ncbi.nlm.nih.gov/pubmed/23668654

By | 2017-05-21T03:15:31+00:00 junio 20th, 2013|Documentos científicos, Exercise and sport, Hydration status of population groups, Water intake recommendations|Comentarios desactivados en Sports nutrition needs: before, during, and after exercise.

Increase in skeletal-muscle glycogenolysis and perceived exertion with progressive dehydration during cycling in hydrated men.

This study investigated the effects of progressive mild dehydration during cycling on whole-body substrate oxidation and skeletal-muscle metabolism in recreationally active men. Subjects (N = 9) cycled for 120 min at ~65% peak oxygen uptake (VO2peak 22.7 °C, 32% relative humidity) with water to replace sweat losses (HYD) or without fluid (DEH). Blood samples were [...]

By | 2017-05-21T03:15:31+00:00 junio 20th, 2013|Documentos científicos, Exercise and sport, Hydration status: effects on physiology and metabolism|Comentarios desactivados en Increase in skeletal-muscle glycogenolysis and perceived exertion with progressive dehydration during cycling in hydrated men.

Ad libitum fluid intake does not prevent dehydration in suboptimally 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 preexercise 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 yr) [...]

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 Ad libitum fluid intake does not prevent dehydration in suboptimally hydrated young soccer players during a training session of a summer camp.

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.