Universität zu Köln

Mora-Rodriguez, Ricardo ORCID: 0000-0001-9252-4933, Ortega, Juan F., Fernandez-Elias, Valentin E. ORCID: 0000-0002-1459-5442, Kapsokefalou, Maria, Malisova, Olga, Athanasatou, Adelais, Husemann, Marlien, Domnik, Kirsten and Braun, Hans (2016). Influence of Physical Activity and Ambient Temperature on Hydration: The European Hydration Research Study (EHRS). Nutrients, 8 (5). BASEL: MDPI. ISSN 2072-6643

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Abstract

This study explored the effects of physical activity (PA) and ambient temperature on water turnover and hydration status. Five-hundred seventy three healthy men and women (aged 20-60 years) from Spain, Greece and Germany self-reported PA, registered all food and beverage intake, and collected 24-h urine during seven consecutive days. Fasting blood samples were collected at the onset and end of the study. Food moisture was assessed using nutritional software to account for all water intake which was subtracted from daily urine volume to allow calculation of non-renal water loss (i.e., mostly sweating). Hydration status was assessed by urine and blood osmolality. A negative association was seen between ambient temperature and PA (r = -0.277; p < 0.001). Lower PA with high temperatures did not prevent increased non-renal water losses (i.e., sweating) and elevated urine and blood osmolality (r = 0.218 to 0.163 all p < 0.001). When summer and winter data were combined PA was negatively associated with urine osmolality (r = -0.153; p = 0.001). Our data suggest that environmental heat acts to reduce voluntary PA but this is not sufficient to prevent moderate dehydration (increased osmolality). On the other hand, increased PA is associated with improved hydration status (i.e., lower urine and blood osmolality).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Mora-Rodriguez, Ricardo UNSPECIFIED orcid.org/0000-0001-9252-4933 UNSPECIFIED Ortega, Juan F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fernandez-Elias, Valentin E. UNSPECIFIED orcid.org/0000-0002-1459-5442 UNSPECIFIED Kapsokefalou, Maria UNSPECIFIED UNSPECIFIED UNSPECIFIED Malisova, Olga UNSPECIFIED UNSPECIFIED UNSPECIFIED Athanasatou, Adelais UNSPECIFIED UNSPECIFIED UNSPECIFIED Husemann, Marlien UNSPECIFIED UNSPECIFIED UNSPECIFIED Domnik, Kirsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Braun, Hans UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-276341
DOI:	10.3390/nu8050252
Journal or Publication Title:	Nutrients
Volume:	8
Number:	5
Date:	2016
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2072-6643
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHRONIC KIDNEY-DISEASE; WATER-INTAKE; ACTIVITY QUESTIONNAIRE; PHYSIOLOGICAL-BASIS; PLASMA OSMOLALITY; BODY-COMPOSITION; PLAIN WATER; SERUM; RELIABILITY; VALIDITY Multiple languages Nutrition & Dietetics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/27634