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					Originally Posted by Riot  I laughed    
But don't you empty your bladder before you run, and ensure you haven't eaten a meal?  Pretty much the same thing.  I did 2 miles today, and I'll bet I lost half a percent in dehydration (sweating).
 
If a horse loses 1% of it's body weight to sweating/lasix, that's 4.5 kg, that's replaceable by a few buckets of water back in the barn over the few hours post-race.
 
That's the first time I've ever heard that as a reason   | 
	
 How could you say that is the same thing? Having a full bladder has nothing to do with being hydrated. A person is no more dehydrated after taking a whiz than before taking a whiz. Lasix dehydrates you by making your fluids go into your bladder. The fluid leaving the bladder is not the part that dehydrates you.
Hey Cmorioles. Don't take a whiz before you go running. It will dehydrate you. LOL. Riot must think we are really stupid.