BLOOD VOLUME: IMPORTANCE AND ADAPTATIONS TO EXERCISE TRAINING, ENVIRONMENTAL STRESSES, AND TRAUMA/SICKNESS.

This paper reviews the influence of several perturbations (physical exercise, heat stress, terrestrial altitude, microgravity, and trauma/sickness) on adaptations of blood volume (BV), erythrocyte volume (EV), and plasma volume (PV). Exercise training can induce BV expansion: PV expansion usually occurs immediately, but EV expansion takes weeks. EV and PV expansion contribute to aerobic power improvements [...]

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

By |2013-01-31T18:33:26+00:00enero 31st, 2013|Behaviour: knowledge, understanding and attitudes of the population, Scientific papers|0 Comments
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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
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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
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RESPONSES TO DEHYDRATION AND REHYDRATION DURING HEAT EXPOSURE IN YOUNG AND OLDER MEN.

Body temperature, plasma responses, and subjective ratings of thirst and hotness were studied in 5 older men (OM, 61-67 yr) and 6 younger men (YM, 21-29 yr) during 180-min thermal dehydration and subsequent 60-min rehydration (45 degrees C, 25% relative humidity). Rectal temperature (Tre) increased more rapidly and to a greater magnitude in OM, while [...]

By |2013-01-31T18:33:26+00:00enero 31st, 2013|Body water content; body composition, Scientific papers|0 Comments
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