It's not really a debate though is it. It's just Mike telling us we're all wrong. And that if we carry any water on a race or ever have a pee during a race (even if it is a 25 mile race) we are over hydrating. Also that we are at risk of hyponatremia by drinking during a race - even though most of us drinking on longer races wouldn't be drinking excessively and would be eating too (ie, taking on salts). Not really a sensible debate is it.