This time the disease has picked a man who'll fight back.

He's an incredibly brave young man (only 40) who's determined to make a difference, The Difference to all of those who suffer from this debilitating, painful, often embarassing and insidious condition.

Alex has just completed a super-marathon, biking and running from America's West Coast to the Statue of Liberty in the East.

Now he's off to Greece for the first of what he reckons is another 25 marathons until he clocks up the millionth metre.

Follow his progress here.