Actually had a guy that use to work with us who was 75, dude was a fucking pimp at the concrete work. He did more then alot more then some of the young 20 yr olds we have hired. Good man, he passed this past yr but was a fucking pimp at concrete. Also my paps is 65 and still goin strong. But the back thing is so true, its hard to get up and move in the morning sometimes.