ArticleEuropean journal of applied physiology2012
No case of exercise-associated hyponatraemia in top male ultra-endurance cyclists: the 'Swiss Cycling Marathon'.
Article in European journal of applied physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
13 citing papers in PubMed, 29 citations in OpenAlex.
- Exercise-Associated Hyponatremia: Serum Sodium, Symptomatology, Severity, and Sport Specificity.Open access journal of sports medicine · 2025Review
- Ultra-Cycling- Past, Present, Future: A Narrative Review.Sports medicine - open · 2024Review
- Exercise-Associated Hyponatremia in Endurance and Ultra-Endurance Performance-Aspects of Sex, Race Location, Ambient Temperature, Sports Discipline, and Length of Performance: A Narrative Review.Medicina (Kaunas, Lithuania) · 2019Review
- Nutrition in Ultra-Endurance: State of the Art.Nutrients · 2018Review
- Moving in extreme environments: extreme loading; carriage versus distance.Extreme physiology & medicine · 2016Review
- Energy balance of triathletes during an ultra-endurance event.Nutrients · 2014Article
- Physiopathological, Epidemiological, Clinical and Therapeutic Aspects of Exercise-Associated Hyponatremia.Journal of clinical medicine · 2014Review
- Changes in foot volume, body composition, and hydration status in male and female 24-hour ultra-mountain bikers.Journal of the International Society of Sports Nutrition · 2014Article
- The prevalence of exercise-associated hyponatremia in 24-hour ultra-mountain bikers, 24-hour ultra-runners and multi-stage ultra-mountain bikers in the Czech Republic.Journal of the International Society of Sports Nutrition · 2014Article
- What do athletes drink during competitive sporting activities?Sports medicine (Auckland, N.Z.) · 2013Review
- Exercise-associated hyponatremia in an ultra-endurance mountain biker: a case report.Sports health · 2013Article
- Age and gender difference in non-drafting ultra-endurance cycling performance - the 'Swiss Cycling Marathon'.Extreme physiology & medicine · 2013Article
- Participation and performance trends in ultracycling.Open access journal of sports medicine · 2013Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The prevalence of exercise-associated hyponatraemia (EAH) has been investigated in endurance athletes such as runners and Ironman triathletes, but not in ultra-endurance road cyclists. We assessed fluid intake and changes in body mass, urine specific gravity and plasma sodium concentration ([Na(+)]) in 65 ultra-endurance road cyclists in a 720-km ultra-cycling marathon, the 'Swiss Cycling Marathon'. The cyclists lost 1.5 (1.7)% body mass (P < 0.01). No athlete developed EAH. Fluid intake was associated with the change in plasma [Na(+)] (r = -0.32, P < 0.05) and the change in body mass (r = -0.30, P < 0.05). The change in plasma [Na(+)] was related to post-race plasma [Na(+)] (r = 0.63, P < 0.0001). To conclude, ad libitum fluid intake in ultra-endurance cyclists in a single-stage ultra-endurance road cycling race showed no case of EAH. Future studies regarding drinking behaviour in different ultra-endurance disciplines might give insights into why the prevalence of EAH is different in the different disciplines.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.