Journal Title (Medline/Pubmed accepted abbreviation): Int J Sports Med
Page numbers: 814
doi (if applicable):10.1055/s-0031-1286301
Article type: Letter
Summary of letter:
Comments were made by Dr. Shepard regarding a recent study suggesting that exercise-associated hyponatremia could be a problem, even in warm climates (Lee JKW, et al. Int J Sports Med. 2011;32:297-302). He raised an objection to using incidence rate (per 10,000 participants) with such a small number of participants. Also, a blood sodium concentration of < 135 mmol/L is usually asymptomatic and could have been present before the race started. However, 7% to 8% of the runners did gain body mass during the event, which suggests that excess fluid intake did occur.
Interpretation of findings/Key practice applications:
Dr. Shepard stated that there was merit to the main recommendation of regulating the fluid intake of distance runners, even under tropical conditions.