After years of overeating, drinking too much alcohol and never exercising, the good life finally caught up with Geoff Whitington.
The 64-year-old from Singleton in Kent was told by doctors in 2013 that type 2 diabetes brought on by his lifestyle would mean he would have to have a foot amputated.
But his family weren't prepared to accept that diagnoses and set themselves the task of turning Geoff's life around - and capturing his story in a documentary.
His sons Anthony and Ian decided that their own lives had to wait and they embarked on a mission to restore their dad's health and enjoyment of life.
They had to battle with decades of engrained and destructive habits and negativity but were able to transform their father from a barely mobile security guard to a fighting fit endurance cyclist.
Altering his diet and keeping up with regular exercise saw Geoff drop from 20 stone to 13 and a half, and improve his circulation.
Anthony and Ian, both experienced film-makers, decided to make the documentary, Fixing Dad to capture their father's struggle back to fitness.
Two years later, his health has improved dramatically. Geoff is on his bike every day and is planning to take part in the Prudential RideLondon for the second time.
The Kent-based charity the Paula Carr Trust has backed the family in their campaign and provided funding for the film Fixing Dad.
Here is the full report by Tom Savvides. It includes interviews with Geoff Whitington, his sons Ian and Anthony and Gary Fagg from the Paula Carr Diabetes Trust.