Influence of Triathlon on the Electrolyte Balance

Hyponatremia Clinical Trial

— Ironman  

Official title:

Acid-base and Electrolyte Balance Among Triathletes in the Ironman European Championship

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02263586
• Other study ID #: Ironman
• Status: Completed
• Phase: N/A
• First received: October 4, 2014
• Last updated: May 2, 2015
• Start date: August 2014
• Est. completion date: May 2015

Study information

• Verified date: May 2015
• Source: University Hospital of Cologne
• Contact: n/a
• Is FDA regulated: No
• Health authority: Germany: Ethics Commission
• Study type: Observational

Clinical Trial Summary

Aim of the study is examining the incidence of the occurrence of hyponatremia during a Triathlon

Description:

Studies in similar endurance sports (e.g. marathon) could already indicate a high incidence for the appearance of hyponatremia during competitions. The loss of sodium through sweating and the excessive fluid intake during the competitions is a primary risk factor for the development of hyponatremia.

Based on the known occurrence of hyponatremia in marathon runners, participants of the Ironman European Championship between the years 2005 and 2014 were screened for the occurrence of hyponatremia after finishing the race for safety reasons. Subjects were approached at random in the athlete's garden and invited to participate. All participants were 18 years or older.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 1089
• Est. completion date: May 2015
• Est. primary completion date: April 2015
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 18 Years to 60 Years

Eligibility

Inclusion Criteria:

• finisher of a long-distance triathlon

• > 18 years

• < 60 years

Exclusion Criteria:

• not finished a long-distance triathlon

• < 18 years

• > 60 years

Study Design

Observational Model: Cohort, Time Perspective: Retrospective

Related Conditions & MeSH terms

• Hyponatremia

Intervention

Behavioral:
• Education in nutrition
Athletes were given a 45 min lesson on the proper diet and fluid intake to prevent hyponatremia in long-distance triathlon.

Locations

Country	Name	City	State
Germany	Uniklinik Köln	Köln	NRW

Sponsors (1)

Lead Sponsor	Collaborator
University Hospital of Cologne

Country where clinical trial is conducted

Germany, 

References & Publications (1)

Almond CS, Shin AY, Fortescue EB, Mannix RC, Wypij D, Binstadt BA, Duncan CN, Olson DP, Salerno AE, Newburger JW, Greenes DS. Hyponatremia among runners in the Boston Marathon. N Engl J Med. 2005 Apr 14;352(15):1550-6. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Electrolyte balance Blood sodium		within 20 minutes after finishing the race	Yes
Secondary	Acid balance		within 20 minutes after finishing the race	Yes