Personally, i think they got their fitness from eating spaghetti and lugging 24lb Colnagos up the hills. God those things were heavy. Don't get me wrong, I really don't give a ***** about weight, but god those old Colnagos and Viners weighted a tonne. They had a pretty good 'Old School Euro trash' look about them back then, too.
*****, you can't train hard all the time?!?! Faaaarrk. And here I was pushing a 60:11 every day for 4 hours!