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 +/- [...]
INFLUENCE OF HEAT-STRESS INDUCED DEHYDRATION ON MENTAL FUNCTIONS
No abstract available.
SERIAL EVALUATION OF VASOPRESSIN RELEASE AND THIRST IN HUMAN PREGNANCY
Serial studies were designed to characterized changes in osmoregulation throughout gestation. Eight women underwent a 2-h infusion of hypertonic saline before conception, during gestational weeks 5-8, 10-12, and 28-33, and then 10-12 wk postpartum. Basal plasma osmolality (Posmol) was already significantly decreased by 5-8 wk (P less than 0.001) and remained 10 mosmol.kg-1 below nonpregnant [...]
PREDICTING SWEAT LOSS RESPONSE TO EXERCISE, ENVIRONMENT AND CLOTHING
No abstract available.
RESTING METABOLIC RATE AND BODY COMPOSITION OF HEALTHY SWEDISH WOMEN DURING PREGNANCY
Body weight, resting metabolic rate (RMR), total body potassium (TBK), and total body water were measured and total body fat (TBF) was calculated in a longitudinal study of 22 pregnant, healthy Swedish women. Measurements were made before pregnancy, at gestational weeks 16-18, 30, and 36, and 5-10 d and 6 mo postpartum. RMR increased more [...]
URINE OSMOLALITY AND CONDUCTIVITY AS INDICIES OF HYDRATION STATUS IN ATHLETES IN THE HEAT
PURPOSE: The purpose of this study was to determine a quick and easy method for assessment of day-to-day hydration status in athletes in the heat. METHODS: Measurement of the osmolality of the first urine sample of the day collected after wakening but before breakfast established a standardized collection procedure to allow day-to-day comparisons of individuals. [...]
FLUID BALANCE AND HYDRATION HABITS OF ELITE FEMALE FIELD HOCKEY PLAYERS DURING CONSECUTIVE INTERNATIONAL MATCHES.
The purpose of this study was to assess sweat loss and hydration practices of elite female field hockey players during consecutive international matches. Eighteen England U21 field hockey players were assessed during 2 consecutive international matches. Sweat loss was assessed from changes in body mass after correction for the volume of fluid consumed and any [...]