Glycerol ingestion has been shown to mediate hyperhydration; however, the mechanism(s) responsible for this improved fluid retention is not well understood. This study examined the hormonal, renal, and vascular fluid responses to glycerol hyperhydration in 11 resting male volunteers who ingested one of two experimental solutions and then a water bolus. The volume of fluid [...]
OBJECTIVE: To determine changes in standard laboratory measures of dehydration among residents of a nursing home care unit (NHCU) over a 6-month period. DESIGN: A prospective cohort analytic study. SETTING: A 130-bed NHCU in a Department of Veterans Affairs Hospital. PATIENTS: Fifteen infirm but stable male residents (mean age 77 years; range (R) 62-93) on [...]
Athletes and researchers could benefit from a simple and universally accepted technique to determine whether humans are well-hydrated, euhydrated, or hypohydrated. Two laboratory studies (A, B) and one field study (C) were conducted to determine if urine color (Ucol) indicates hydration status accurately and to clarify the interchangeability of Ucol, urine osmolality (Uosm), and urine [...]
Urination was studied in 15 normal infants and young children on 150 occasions in the course of metabolic balance studies. With increasing age, mean urine volume increased if expressed as ml/day and decreased if expressed as ml/kg/day. Urine volume was correlated with volume of intake (r = 0.697) and accounted for a similar percentage of [...]
This study assessed the need to replace sodium in endurance exercise less than or equal to 6 h in duration by comparing responses to fluid replacement with water, saline (25 mmol.l-1), or no fluid. Eight subjects (five male, three female) participated in three 6-h exercise trials on an electrically braked cycle ergometer at 55% VO2max, [...]
Intake and output of water were studied in six male subjects from six European countries during 28 days of isolation and confinement in order to assess whether the observed reactions can be compared with those observed during space travel. On the average, the subjects drank 17.5 ml/kg/day fluids. An additional 25 ml/kg/day was recruited from [...]
No abstract available.
Cellular hydration can change within minutes under the influence of hormones, nutrients, and oxidative stress. Such short-term modulation of cell volume within a narrow range acts per se as a potent signal which modifies cellular metabolism and gene expression. It appears that cell swelling and cell shrinkage lead to certain opposite patterns of cellular metabolic [...]
No abstract available.
No abstract available.