Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/109761
DC Field | Value | Language |
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dc.contributor.author | Costa, Ricardo J. S. | - |
dc.contributor.author | Teixeira, Ana | - |
dc.contributor.author | Rama, Luís | - |
dc.contributor.author | Swancott, Abigail J. M. | - |
dc.contributor.author | Hardy, Lisa D. | - |
dc.contributor.author | Lee, Benjamin | - |
dc.contributor.author | Camões-Costa, Vera | - |
dc.contributor.author | Gill, Samantha | - |
dc.contributor.author | Waterman, Jessica P. | - |
dc.contributor.author | Freeth, Emily C. | - |
dc.contributor.author | Barrett, Edel | - |
dc.contributor.author | Hankey, Joanne | - |
dc.contributor.author | Marczak, Slawomir | - |
dc.contributor.author | Valero-Burgos, Encarna | - |
dc.contributor.author | Scheer, Volker | - |
dc.contributor.author | Murray, Andrew S. | - |
dc.contributor.author | Thake, Charles D. | - |
dc.date.accessioned | 2023-10-25T11:28:55Z | - |
dc.date.available | 2023-10-25T11:28:55Z | - |
dc.date.issued | 2013-01-15 | - |
dc.identifier.issn | 1475-2891 | pt |
dc.identifier.uri | https://hdl.handle.net/10316/109761 | - |
dc.description.abstract | Background: Anecdotal evidence suggests ultra-runners may not be consuming sufficient water through foods and fluids to maintenance euhydration, and present sub-optimal sodium intakes, throughout multi-stage ultra-marathon (MSUM) competitions in the heat. Subsequently, the aims were primarily to assess water and sodium intake habits of recreational ultra-runners during a five stage 225 km semi self-sufficient MSUM conducted in a hot ambient environment (Tmax range: 32°C to 40°C); simultaneously to monitor serum sodium concentration, and hydration status using multiple hydration assessment techniques. Methods: Total daily, pre-stage, during running, and post-stage water and sodium ingestion of ultra-endurance runners (UER, n = 74) and control (CON, n = 12) through foods and fluids were recorded on Stages 1 to 4 by trained dietetic researchers using dietary recall interview technique, and analysed through dietary analysis software. Body mass (BM), hydration status, and serum sodium concentration were determined pre- and post-Stages 1 to 5. Results: Water (overall mean (SD): total daily 7.7 (1.5) L/day, during running 732 (183) ml/h) and sodium (total daily 3.9 (1.3) g/day, during running 270 (151) mg/L) ingestion did not differ between stages in UER (p < 0.001 vs. CON). Exercise-induced BM loss was 2.4 (1.2)% (p < 0.001). Pre- to post-stage BM gains were observed in 26% of UER along competition. Pre- and post-stage plasma osmolality remained within normal clinical reference range (280 to 303 mOsmol/kg) in the majority of UER (p > 0.05 vs. CON pre-stage). Asymptomatic hyponatraemia (<135 mmol/L) was evident pre- and post-stage in n = 8 UER, corresponding to 42% of sampled participants. Pre- and post-stage urine colour, urine osmolality and urine/plasma osmolality ratio increased (p < 0.001) as competition progressed in UER, with no change in CON. Plasma volume and extra-cellular water increased (p < 0.001) 22.8% and 9.2%, respectively, from pre-Stage 1 to 5 in UER, with no change in CON. Conclusion: Water intake habits of ultra-runners during MSUM conducted in hot ambient conditions appear to be sufficient to maintain baseline euhydration levels. However, fluid over-consumption behaviours were evident along competition, irrespective of running speed and gender. Normonatraemia was observed in the majority of ultra-runners throughout MSUM, despite sodium ingestion under benchmark recommendations. | pt |
dc.language.iso | eng | pt |
dc.publisher | Springer Nature | pt |
dc.relation | Coventry University | pt |
dc.relation | Coventry University Sport & Exercise Science Applied Research Group | pt |
dc.relation | European Hydration Institute | pt |
dc.rights | openAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
dc.subject | Water | pt |
dc.subject | Drinking | pt |
dc.subject | Beverages | pt |
dc.subject | Total body water | pt |
dc.subject | Dehydration | pt |
dc.subject | Euhydration | pt |
dc.subject | Hyponatraemia | pt |
dc.subject | Carbohydrate | pt |
dc.subject.mesh | Adult | pt |
dc.subject.mesh | Asymptomatic Diseases | pt |
dc.subject.mesh | Body Water | pt |
dc.subject.mesh | Cohort Studies | pt |
dc.subject.mesh | Female | pt |
dc.subject.mesh | Humans | pt |
dc.subject.mesh | Hyponatremia | pt |
dc.subject.mesh | Male | pt |
dc.subject.mesh | Middle Aged | pt |
dc.subject.mesh | Plasma Volume | pt |
dc.subject.mesh | Running | pt |
dc.subject.mesh | Sodium, Dietary | pt |
dc.subject.mesh | Water-Electrolyte Balance | pt |
dc.subject.mesh | Drinking | pt |
dc.subject.mesh | Feeding Behavior | pt |
dc.subject.mesh | Physical Endurance | pt |
dc.title | Water and sodium intake habits and status of ultra-endurance runners during a multi-stage ultra-marathon conducted in a hot ambient environment: an observational field based study | pt |
dc.type | article | - |
degois.publication.firstPage | 13 | pt |
degois.publication.issue | 1 | pt |
degois.publication.title | Nutrition Journal | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.1186/1475-2891-12-13 | pt |
degois.publication.volume | 12 | pt |
dc.date.embargo | 2013-01-15 | * |
uc.date.periodoEmbargo | 0 | pt |
item.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.openairetype | article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | Com Texto completo | - |
crisitem.author.researchunit | CIDAF - Research Unit for Sport and Physical Activity | - |
crisitem.author.researchunit | CIDAF - Research Unit for Sport and Physical Activity | - |
crisitem.author.orcid | 0000-0003-1498-949X | - |
crisitem.author.orcid | 0000-0002-9619-8618 | - |
crisitem.author.orcid | 0000-0001-5559-1862 | - |
Appears in Collections: | FCDEF - Artigos em Revistas Internacionais |
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