Does it happen to you? How do you avoid it? What is your diet like and can you maintain your ideal weight on that diet?
I have this problem almost every time I go over about 3km, the pounding and up and down motion gives me a terrible cramp and there is nothing for it but to find a bush. And it is very much runs ifyswim.....
I hate it - feel icky for the rest of my run, have the embarrassment of using bushes, it slows me down and messes up my pace!
And yes, I do go to the loo several times before I go out. I need to run in the mornings so as not to take away family time, so I have to get up and go to the loo straight away. I can sometimes 'go' three times or more before I leave and still the cramps get me.
My diet (aside from the last two weeks) is mainly fruit, nuts, veg, meat, fish, dark chocolate and wine and all dairy products. I don't like bread gives me tummy ache, pasta I find boring, avoid potatoes as they are a pointless veg! Sometimes have some brown rice or lentils.
The only advice I can find online is to avoid dairy and high fibre. But my diet is mostly high fibre and I am not sure how you can eat a healthy low fibre diet 
I am panicky about group races, the last one I did I managed to give myself piles as I tried to go so much in the portaloos before the race! I am upping my distances, but honestly last week on a 9 mile run, I had to go twice 
Help!
And apologies in advance if this is too much information...!