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PURPOSE To determine whether: a) plasma osmolarity (Posm) is sensitive to small incremental changes in hydration status, b) urine specific gravity (Usg) can accurately identify a state of euhydration, c) Usg is a sensitive indicator of a change in hydration status, and d) Usg correlates with Posm. METHODS Euhydrated (Posm = 288 +/- 4 mOsm.L-1) subjects (N(More)
To reduce the adverse consequences of exertion-related and acute intentional dehydration research has focused on monitoring hydration status. This investigation: 1) compared sensitivity of urine specific gravity (Usg), urine osmolality (U(osm)) and a criterion measurement of hydration, plasma osmolality (P(osm)), at progressive stages of acute hypertonic(More)
A ten-stage treadmill test was developed and standardized to secure the VO2max of male and female rats assigned to various cross-sectional and longitudinal experimental groups. Repeated measurements indicated that the test procedure was reliable and could be used for research purposes. When the test was used with different strains, the untrained(More)
Dehydration not only reduces athletic performance, but also places athletes at risk of health problems and even death. For athletes, monitoring hydration has significant value in maximising performance during training and competition. It also offers medical personnel the opportunity to reduce health risks in situations where athletes engage in intentional(More)
Distilled water, a carbohydrate-electrolyte (CE; 4% sucrose, 2% glucose, 17.2 meq/l NaCl, and 2.8 meq/l KCl) solution, or a 10% glucose solution, all containing the nonabsorbed indicator polyethylene glycol (PEG) and deuterium oxide (D2O, 30 ppm), were infused (15 ml/min) into the duodenojejunum of seven men by using the triple lumen technique. Net water(More)
St. John's wort, a popular over-the-counter drug for treatment of depression, might reduce concentrations of drugs such as cyclosporin and indinavir and lead to drug resistance and treatment failure. No studies as yet have examined its influence on methadone plasma levels. The trough methadone plasma levels were measured in four patients (2 males, median(More)
BACKGROUND Many intravenous opiate users are infected with hepatitis C virus (HCV) but few are treated. Although this complies with various guidelines, virtually no published evidence supports such a recommendation. PATIENTS AND METHODS In a multicenter study, HCV-infected patients in opiate maintenance treatment programs received interferon plus high- or(More)
A comparison of the leg-to-leg bioelectrical impedance (BIA) system and skinfold analysis in estimating % body fat in a large number of National Collegiate Athletic Association (NCAA) collegiate wrestlers was conducted. A series of 5 cross-sectional assessments, including the NCAA Division I and III Championships, were completed throughout the 1998-1999(More)
OBJECTIVE To review 16 years of National Collegiate Athletic Association (NCAA) injury surveillance data for men's wrestling and identify potential areas for injury prevention initiatives. BACKGROUND From 1988-1989 through 2003-2004, 17% of NCAA schools sponsoring varsity men's wrestling programs participated in annual Injury Surveillance System (ISS)(More)
This study examined resting metabolic rate in adolescent wrestlers to test the hypothesis that repeated cycles of weight loss and regain would be associated with reduced energy requirements. Energy restriction lowers resting metabolic rate in normal-weight and obese persons. Repeated cycles of weight loss and regain can increase food efficiency, defined as(More)