WATER TURNOVER AND BODY COMPOSITION DURING LONG-TERM EXPOSURE TO HIGH ALTITUDE (4,900A–7,600 M).

Thirteen healthy subjects (11 men and 2 women; 30.2 +/- 5.4 yr; 73.5 +/- 10.3 kg; 178.9 +/- 10.4 cm; body mass index, 22.9 +/- 1.6 kg/m2) participated at the 62-day expedition to the Broad Peak (8,047 m), Pakistan. Weight, body water, and water turnover (deuterium dilution and elimination) were measured eight times to assess [...]

PHYSICAL FITNESS INFLUENCES WATER TURNOVER AND BODY WATER CHANGES DURING TREKKING.

PURPOSE: This study was performed to assess water turnover and changes of body water during a trekking tour at moderate altitude. METHODS: Fifteen healthy normally trained adults participated in a 7-d backpack trek tour in the Swiss Alps (total walking distance: 120.5 km; cumulated altitude difference: 6990 m (uphill) and 7550 m downhill; lowest point: [...]

By |2013-01-31T18:33:26+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

ROLE OF DEHYDRATION IN HEAT STRESS-INDUCED VARIATIONS IN MENTAL PERFORMANCE.

Variation in mental performance under different levels of heat stress-induced dehydration was recorded in 11 subjects heat acclimatized to the tropicals. Dehydration was induced by a combination of water restriction and exercise in heat. The psychological functions--arithmetic ability, short-term memory, and visuomotor tracking--were assessed in a thermoneutral room after the subjects recovered fully from the [...]

By |2013-01-31T18:33:26+00:00enero 31st, 2013|Mental performance, Scientific papers|0 Comments

EFFECT OF WATER DEPRIVATION ON COGNITIVE-MOTOR PERFORMANCE IN HEALTHY MEN AND WOMEN.

Whether mental performance is affected by slowly progressive moderate dehydration induced by water deprivation has not been examined previously. Therefore, objective and subjective cognitive-motor function was examined in 16 volunteers (8 females, 8 males, mean age: 26 yr) twice, once after 24 h of water deprivation and once during normal water intake (randomized cross-over design; [...]

By |2013-01-31T18:33:25+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

BODY COMPOSITION IN PREGNANCY.

Concern over the influence of pregnancy-related alterations in hydration has prompted questions regarding the accuracy of using standard methods of determining body composition. We sought to investigate whether differences exist between body composition determined at 30 weeks and 39 weeks of gestation and postpartum, when measured by both bioelectrical impedance and hydrostatic weighing. This preliminary [...]