Table 2.

Prevalence of exercise-induced hyponatremia (EAH) in marathon runners.

Study (Year)	Prevalence of EAH
Hew et al., 2003 [69]	<1%
Chorley et al., 2007 [70]	22%
Almond et al., 2005 [71]	13%
Hsieh et al., 2002 [72]	5.6%
Siegel et al., 2009 [73]	4.8%
Mettler et al., 2008 [74]	3%