During a run, it is not necessary to consume fluids.
If you're doing a long run or race (more than 8 to 10 miles), it's important to make sure you're well-hydrated during the few days leading up to your long run. [ You know you're well-hydrated if you void large volumes of pale urine at least six times a day. In the days leading up to your long run (or race), drink plenty of water and nonalcoholic fluids. Not only does alcohol dehydrate you, but
it can also prevent you from getting a good night's sleep. It's not a good idea to run with a hangover because you'll most likely be dehydrated when you start running
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