A few years ago, Robert Durbin weighed around 215lbs, smoked 60 cigarettes a day and needed a cane to walk.
But with grandchildren on the way, the 64-year-old decided enough was enough and embarked on a gruelling fitness regime that would make any spritely young man break out in a cold sweat.
He has now lost more than 70lbs, trimmed 18 inches off his waist and is so strong he can even support himself horizontally while holding onto a pole.
The father-of-five, from Louisville, Kentucky, has certainly put in the hard yards for his new figure.
His rigorous training regime consists of a mile on his elliptical ski glider every morning followed by up to 1,800 abdominal exercises and then a further three hours in the gym.
He then repeats his ski glider and abdominal exercises before going to bed, it was reported by ABC News.
Having once been a 'two-plate person' every meal, he now eats five or six small portions every day and has cut out fried food from his diet.
