Reg Owen's work colleagues in County Hall, Haverfordwest, are urging him to go on a crash diet - before they push him across Wales!
Billed as 'The Big Push', it is a sponsored walk with a difference.
Next month around 27 people - many of them Pembrokeshire County Council employees - will walk the breadth of the Principality pushing wheelchair-user Reg all the way.
The route, from the village of Anchor on the English border, to Aberystwyth on the west coast, measures around 60 miles
"They are all asking me if I'm going to go on a diet, but there's no chance of that," joked Reg, who works in Community Education.
Although the hike does have its fun side with the pushers working in shifts, it also has a serious purpose - to raise money for the Lynne Shipp Memorial Fund.
Lynne from Neyland was a former county council colleague of Reg and his friends. Although she suffered from Cystic Fibrosis, Lynne led an active life.
Everyone who knew her was devastated when she died last November, just four months after marrying her fiance, Tony.
The Memorial Fund was set up by her family to support the work of the Cystic Fibrosis Unit at Llandough Hospital, Cardiff.
The group have set themselves three days to complete the journey - from May 10 to May 12 - and have even set up their own website to publicise the event: http://www.geocities.com">www.geocities.com /thebigpush2003/route.html