I'll put this in... simple terms. I use the toilet before I go for a long run, but when I come back, it feels like I had a Vindaloo curry the night before and the world's just dropped out of my arse. More than once I've debated taking toilet roll with me on runs over 10 miles or so.
I haven't changed my diet at all (although the student accommodation hall food is debatable to say the least), the only thing I've done is upped my mileage to 60 or so. Yet I'm almost getting the squits.
I'd like to get this sorted, as one of these days it ain't gonna be a pretty sight