COMPARISON OF GROUND-BASED AND SPACE FLIGHT ENERGY EXPENDITURE AND WATER TURNOVER IN MIDDLE-AGED HEALTHY MALE US ASTRONAUTS.

Energy requirements during space flight are poorly defined because they depend on metabolic-balance studies, food disappearance, and dietary records. Water turnover has been estimated by balance methods only. The purpose of this study was to determine energy requirements and water turnover for short-term space flights (8-14 d). Subjects were 13 male astronauts aged 36-51 y [...]

By |2013-01-31T18:33:26+00:00enero 31st, 2013|Environmental conditions, Scientific papers|0 Comments
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DIFFERENTIAL EFFECTS OF SAUNA-, DIURETIC-, AND EXERCISE-INDUCED HYPOHYDRATION.

The physiological effects on submaximal and maximal exercise of three methods commonly used by athletes for achieving rapid weight loss were determined by measuring cardiorespiratory variables in 62 nonendurance athletes. A mean weight loss of 4.1% was achieved by those who followed either a sauna (SAU), diuretic (DIU), or exercise (ACT) protocol, compared with the [...]

By |2013-01-31T18:33:26+00:00enero 31st, 2013|Caffeine and other diuretics, Scientific papers|0 Comments
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DEHYDRATION IN SOLDIERS DURING WALKING/RUNNING EXERCISE IN THE HEAT AND THE EFFECTS OF FLUID INGESTION DURING AND AFTER EXERCISE.

The aim of this study was to examine whether ingesting water alone, or dextrose (7.5 g x 100 ml(-1)) with electrolytes, or fructose/corn solids (7.5 g x 100 ml(-1)) (400 ml every 20 min) would reduce the perceived exertion associated with 16 km (3 h) walking/running in the heat compared with that perceived during exercise [...]

By |2013-01-31T18:33:26+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments
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VALIDATION AND ADJUSTMENT OF THE MATHEMATICAL PREDICTION MODEL FOR HUMAN SWEAT RATE RESPONSES TO OUTDOOR ENVIRONMENTAL CONDITIONS.

Under outdoor conditions this model was over estimating sweat loss response in shaded (low solar radiation) environments, and underestimating the response when solar radiation was high (open field areas). The present study was conducted in order to adjust the model to be applicable under outdoor environmental conditions. Four groups of fit acclimated subjects participated in [...]

By |2013-01-31T18:33:25+00:00enero 31st, 2013|Hydration status: effects on physiology and metabolism, Scientific papers|0 Comments
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