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. 2022 Sep 1;32(5):517-522.
doi: 10.1097/JSM.0000000000000990. Epub 2021 Oct 29.

Marathon Runners' Knowledge and Strategies for Hydration

Neeharika Namineni  1 , O Alison Potok  2 , Joachim H Ix  2 , Charles Ginsberg  2 , Dan Negoianu  3 , Dena E Rifkin  2 , Pranav S Garimella  2
Affiliations

Marathon Runners' Knowledge and Strategies for Hydration

Neeharika Namineni et al. Clin J Sport Med. .

Abstract

Objective: To study hydration plans and understanding of exercise-associated hyponatremia (EAH) among current marathon runners.

Design: Cross-sectional study.

Setting: Southern California 2018 summer marathon.

Participants: Two hundred ten marathon runners.

Interventions: Survey administered 1 to 2 days before the race. Race times were obtained from public race website.

Main outcome measures: Planned frequency of hydration; awareness of, understanding of, and preventative strategies for dehydration and EAH; resources used to create hydration plans; drink preferences.

Results: When the participants were split into 3 equal groups by racing speed, the slower tertile intended to drink at every mile/station (60%), whereas the faster tertile preferred to drink every other mile or less often (60%), although not statistically significant. Most runners (84%) claimed awareness of EAH, but only 32% could list a symptom of the condition. Both experienced marathoners and the faster tertile significantly had greater understanding of hyponatremia compared with first-time marathoners and the slower tertile, respectively. Less than 5% of marathoners offered "drink to thirst" as a prevention strategy for dehydration or EAH.

Conclusion: Slower runners plan to drink larger volumes compared with their faster counterparts. Both slower and first-time marathoners significantly lacked understanding of EAH. These groups have plans and knowledge that may put them at higher risk for developing EAH. Most marathon runners did not know of the guidelines to "drink to thirst," suggesting the 2015 EAH Consensus statement may not have had the desired impact.

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Conflict of interest statement

The authors report no conflicts of interest.

Figures

Figure 1.
Figure 1.
Knowledge of Dehydration and EAH among 152 participants. 58 participants (28% of total) had knowledge of neither dehydration nor EAH.
See this image and copyright information in PMC

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