Hey folks it's Ben Greenfield here and if there's one subject that seems to

baffle folks more than just about anything else it's how to fuel your body

during an endurance event like a marathon or a triathlon or anything else

where stomach issues can tend to creep up on you as well as knowing just how much

you're supposed to eat how much you're supposed to drink those type of things so

I have a real expert on the call today she has a PhD in environmental

exercise physiologist she is a nutrition scientist expert she works with the

Trek professional cycling team and has worked with many other cycling teams

in the past as well as a lot of triathletes and endurance athletes she

herself has done a half iron man iron man triathlons and she's one of those

people that knows both the science as well as what goes on in the trenches so

her name is Dr. Stacey Sims and Stacey thank you for coming on the call today

thanks Ben thanks for having me so I guess I guess we should probably just jump

right into this but in terms of GI problems among runners among endurance

athletes you know I hear about it a lot from the folks that I coach you read

about it a lot in people's race reports but do you have any figures in

terms of you know how many people this happens to in terms of kind of the

rough percentages of athletes who experience some kind of GI distress while

they're out there racing yeah so when you're thinking about shorter races

shorter duration about 70% of runners and triathletes experience GI distress

and the longer the race distance and the time you're on your feet the greater

people experience GI distress so it can be up to 85% of endurance athletes who

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