Conor Daly, James Hinchcliffe and Will Power offer tips about how to react when nature calls at 200+ mph. Tyler Kraft, Indianapolis Star

Story Highlights 103rd Indy 500: 12:45 p.m. Sunday, NBC

INDIANAPOLIS — When drivers , it’s a fact they need to be hydrated. With the heat that comes from racing in the middle of the day and the fireproof racing suits insulating them, water can be a driver’s best friend.

It can also be his or her worst enemy when it needs to be released.

The Indy 500 doesn’t make it easy for racers to address restroom needs even before the race starts. Once on the track, drivers feel as if

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