“Runners who take part in day-long ‘ultra- marathons’ experience much of their fluid loss in the first 8 hours of the race -- pointing to the importance of staying hydrated early on, a study has found. Ultra-marathons last anywhere from 12 to 24 hours, and although runners can rest, eat and drink when they need to, they are at high risk of becoming seriously dehydrated. In the new study, researchers in Taiwan repeatedly weighed 52 ultra- marathoners over the course their race, which was either a 12- or 24- hour event. They found that, on average, runners in the 12-hour marathon lost nearly 3 percent of their body weight. In the 24-hour group, the average weight loss was 5 percent, according to findings published in the Clinical Journal of Sports Medicine.”
www.reutershealth.com
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