EXERCISE AND FLUID REPLACEMENT
No abstract available.
ALTERED OSMOTIC THRESHOLDS FOR VASOPRESSIN SECRETION AND THIRST IN HUMAN PREGNANCY
Osmoregulation was studied in eight women during late pregnancy and again 8-10 wk postpartum. Base-line plasma osmolality (Posmol) was significantly lower during (280.9 +/- 2.1 mosmol/kg, SD) than after (289.4 +/- 2.1 mosmol/kg) pregnancy yet 24-h urinary volume and plasma arginine vasopressin (PAVP) measured in vasopressinase-inactivated blood was similar in both groups (pregnancy, 1.39 +/- [...]
VOLUNTARY DEHYDRATION AND COGNITIVE PERFORMANCE IN TRAINED COLLEGE ATHLETES.
Cognitive and mood decrements resulting from mild dehydration and glucose consumption were studied. Men and women (total N = 54; M age = 19.8 yr., SD = 1.2) were recruited from college athletic teams. Euhydration or dehydration was achieved by athletes completing team practices with or without water replacement. Dehydration was associated with higher thirst [...]
HYDRATION STATUS OF EXCLUSIVELY AND PARTIALLY BREASTFED NEAR-TERM NEWBORNS IN THE FIRST WEEK OF LIFE.
An in-hospital prospective, observational cohort study was conducted to assess the effects of type of feeding (exclusively breastfed [EBF] vs partially breastfed [PBF]) on the hydration status of near-term newborns in the first week of life. A total of 205 babies of 35 to 37 weeks of completed gestation were enrolled (82 in the EBF [...]
PHYSIOLOGICAL AND PERFORMANCE EFFECTS OF GLYCEROL HYPERHYDRATION AND REHYDRATION.
Studies have shown that beverages containing glycerol can enhance and maintain hydration status and may improve endurance exercise performance by attenuating adverse physiological changes associated with dehydration. Improvements to performance include increased endurance time to exhaustion by up to 24%, or a 5% increase in power or work. However, some studies have found no performance [...]
TOTAL BODY WATER MEASUREMENTS IN ADOLESCENT ATHLETES: A COMPARISON OF SIX FIELD METHODS WITH DEUTERIUM DILUTION.
Assessing hydration, that is, total body water (TBW) in adolescent athletes should be part of a comprehensive training program. However, there are no specific methods to assess TBW in young athletes. Moreover, the use of traditional techniques developed in healthy youths, based on a 2-compartment model, may yield inaccurate TBW estimates in young athletes. Therefore, [...]
THE IMPACT OF PHYSICAL EXERCISE ON THE GASTROINTESTINAL TRACT.
PURPOSE OF REVIEW: Physical exercise can be both beneficial and harmful for the gastrointestinal tract in a dose-effect relationship between its intensity and health. Mild-to-moderate intensity exercises play a protective role against colon cancer, diverticular disease, cholelithiasis and constipation, whereas acute strenuous exercise may provoke heartburn, nausea, vomiting, abdominal pain, diarrhea and even gastrointestinal bleeding. [...]
FLUID REPLACEMENT AND HEAT STRESS DURING EXERCISE ALTER POST-EXERCISE CARDIAC HAEMODYNAMICS IN ENDURANCE EXERCISE-TRAINED MEN.
It has been reported that endurance exercise-trained men have decreases in cardiac output with no change in systemic vascular conductance during post-exercise hypotension, which differs from sedentary and normally active populations. As inadequate hydration may explain these differences, we tested the hypothesis that fluid replacement prevents this post-exercise fall in cardiac output, and further, exercise [...]
POSTEXERCISE REHYDRATION IN MAN: THE EFFECTS OF OSMOLALITY AND CARBOHYDRATE CONTENT OF INGESTED DRINKS.
OBJECTIVE: This study investigated the effect of the osmolality and carbohydrate content of drinks on their rehydration effectiveness after exercise-induced dehydration. METHODS: Six healthy male volunteers were dehydrated by 1.9+/-0.1% of body mass by intermittent cycle ergometer exercise in the heat before ingesting one of three solutions with different carbohydrate contents and osmolalities over a [...]
FLUID INGESTION DURING DISTANCE RUNNING
No abstract available.