Rob said “I tried to think of the worst idea possible and then ran it past my wife. Disappointingly, she said it was a great idea.
“Whatever the difficulties of training, it’s nothing compared to what Gordon’s been through.”
Rob, who will be running the grueling 26 miles on his treadmill to raise money for MND Scotland, has been out and about calling on celebrities to support the cause.
Last week he met up with Rangers stars Kenny Miller and Lee Wallace for a tough training session, under the supervision of boss Mark Warburton (pictured above). Following this he had an inspirational chat with Olympic Marathon runners Derek and Callum Hawkins, who gave him some tips for the big day (pictured below).
Rob and Gordon were also joined by Labour leader Kezia Dugdale, Scottish Conservative leader Ruth Davidson, Edinburgh West Lib Dem MSP Alex Cole-Hamilton and Edinburgh North and Leith SNP MSP Ben Macpherson, to drum up more support.
Gordon said "What Rob is doing to fund a cure for MND is brilliant. I cannot thank him enough.
"On a day when most of us won't move from the sofa, Rob will be running over 26 miles! That's almost like running from Edinburgh to my hometown of Kirkcaldy.
"Curing MND will be a marathon, not a sprint. But every pound Rob raises, takes us a step closer to finding a cure for the thing that is killing me and far too many other people.
“It might be too late for me but we can and we must find a cure for future generations.”
To donate £5 to Rob's fundraising total text CUREMND to 70660 or donate online.
Update: Gordon sadly passed away at the age of 31 in February 2017.