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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-49164

Bracher, A; Knechtle, B; Gnädinger, M; Bürge, J; Rüst, C A; Knechtle, P; Rosemann, T (2012). Fluid intake and changes in limb volumes in male ultra-marathoners: does fluid overload lead to peripheral oedema? European Journal of Applied Physiology, 112(3):991-1003.

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An increase in body mass due to oedema has been previously described. The aim of this study was to investigate a potential association between both fluid and electrolyte intake and the formation of peripheral oedemas. Fluid and electrolyte intakes and the changes in limb volumes in 50 male 100-km ultra-marathoners were measured. Pre- and post-race serum sodium concentration ([Na(+)]), serum aldosterone concentration, serum copeptin concentration, serum and urine osmolality and body mass were determined. Fluid intake, renal function parameters and urinary output, as well as the changes of volume in the extremities, were measured. The changes of volume in the limbs were measured using plethysmography. Serum [Na(+)] increased by 1.6%; body mass decreased by 1.9 kg. Serum copeptin and aldosterone concentrations were increased. The change in serum copeptin concentration and the change in serum [Na(+)] correlated positively; the change in serum [Na(+)] and body mass correlated negatively. A mean fluid intake of 0.58 L/h was positively related to running speed and negatively to post-race serum [Na(+)]. Total fluid intake was positively related to the changes in both arm and lower leg volumes. Running speed was positively associated with the changes in arm and lower leg volumes; race time was related to the changes in serum copeptin or aldosterone concentrations. To conclude, fluid intake was related to the changes in limb volumes, where athletes with an increased fluid intake developed an increase in limb volumes.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of General Practice
DDC:610 Medicine & health
Deposited On:22 Aug 2011 08:42
Last Modified:06 Jan 2014 18:03
Publisher DOI:10.1007/s00421-011-2056-3
PubMed ID:21720884
Citations:Web of Science®. Times Cited: 8
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