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Cited by 42Thermoregulation and physiological responsesSports Performance and TrainingCardiovascular and exercise physiology

Elite Kenyan endurance runners are hydrated day-to-day with ad libitum fluid intake

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FUDGE, BARRY W., EASTON, CHRIS, KINGSMORE, DAVID, KIPLAMAI, FESTUS K., ONYWERA, VINCENT O., WESTERTERP, KLAAS R., KAYSER, BENGT, NOAKES, TIMOTHY D. +1 more·2008·Medicine & Science in Sports & Exercise
DOI 10.1249/mss.0b013e318169cdda
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Abstract

UNLABELLED: Previous studies of elite Kenyan endurance runners reported that athletes did not consume liquids before or during training and infrequently consumed modest amounts of liquids after training that contributed to low daily fluid intake. PURPOSE: To assess hydration status of elite Kenyan endurance runners during an important training period. METHODS: Hydration status was monitored in fourteen elite Kenyan endurance runners over a 5-d training period 1 wk prior to the Kenyan national trials for the 2005 IAAF Athletics World Championships by measuring body mass, urine osmolality, total body water, and daily fluid intake. Dietary sodium (Na) intake was estimated using a 5-d nutritional diary and biochemical analysis, whilst [Na] was determined in urine and sweat. Intestinal temperature was monitored continuously during training sessions. RESULTS: Daily fluid intake was consistent with previous observations. There was a significant body mass loss during the morning, interval, and afternoon training sessions (P < 0.05). Nevertheless, mean total body water and pretraining body mass were well maintained day-to-day throughout the 5-d recording period (P = 0.194 and P = 0.302, respectively). Furthermore, there was no significant difference between the osmolality of the morning urine sample and the evening sample (P = 0.685). Mean Na intake was not significantly different to Na loss in sweat and urine (P = 0.975). No athlete showed signs or symptoms of heat strain at any time. CONCLUSIONS: These results demonstrate that elite Kenyan endurance runners remain well hydrated day-to-day with an ad libitum fluid intake; a pattern and volume of fluid intake that is consistent with previous observations of elite Kenyan endurance runners.

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Authors
FUDGE, B. W., EASTON, C., KINGSMORE, D., KIPLAMAI, F. K., ONYWERA, V. O., WESTERTERP, K. R., KAYSER, B., NOAKES, T. D., & PITSILADIS, Y. P.
Affiliations
  • University of Glasgow (GB)
  • Gartnavel General Hospital (GB)
  • Kenyatta University (KE)
  • Maastricht University (NL)
  • University of Geneva (CH)
  • University of Cape Town (ZA)
ORCID
Venue
Medicine & Science in Sports & Exercise
Publisher
Ovid Technologies (Wolters Kluwer Health)
Published
2008-06
Volume
40
Issue
6
Pages
1171-1179
ISSN
0195-9131 (ISSN-L)
DOI
10.1249/mss.0b013e318169cdda
OpenAlex
W2137487659
Cited by
42
References
40
Citations by year
2025: 2 · 2024: 2 · 2021: 1 · 2019: 3 · 2018: 3 · 2017: 3 · 2016: 2 · 2015: 1 · 2014: 4 · 2013: 7 · 2012: 3
FWCI
2.26
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Medicine & Science in Sports & Exercise (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (acceptedVersion)
  • Research Publications (Maastricht University) (submittedVersion, other-oa)
  • University of Brighton Repository (University of Brighton) (submittedVersion)
  • Research Repository (Kingston University London) (submittedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
Topics
  • Health Sciences › Medicine › Physiology › Thermoregulation and physiological responses
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
Keywords
hydration status, endurance runners, Kenyan athletes, urine osmolality, total body water, weight loss, sodium intake, sweat sodium loss, heat strain, training duration
MeSH terms
Adult, Drinking, Humans, Kenya, Physical Endurance, Running, Water-Electrolyte Balance, Athletic Performance

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