Update 8/17/2008: Since Art changed his blog around, the links below to his photos are no longer available. However, I've written a lot of stuff about Art, and you can skim through all my "EvFit" postings here. Also, here's a recent video clip of Art, taken a few months back at a seminar I attended in Vegas.
He turns 71 years old in August. I would say that almost anyone should be able to obtain those kind of results in just a few year's time, depending on where you are when you begin. It's 80% about the diet, and the workouts should be short (30-40 minutes max), intense, and no more frequent than 2-3 times per week at the gym.
By the way, I'll probably devote a post to this and a few other items, but I dumped the Lyle McDonald Rapid Fat Loss Diet early in the week and went back to eating EvFit/Paleo and I'm not looking back, ever. I bring this up because I think a lot of people look at someone like Art, who has been practicing EvFit for 25 years or so, and they conclude it's going to be hard work, requiring too much discipline, etc. Nothing could be further from the truth. I'm just one person and I guess that perhaps some would not enjoy an EvFit lifestyle, but all I could think of while on that low-carb, low-fat, mega protein diet in order to speed my progress in getting to 10% BF was getting back to the EvFit way of eating that I have come to love. This is a way of life, or "Life Way," as Art calls it, not a diet or "exercise program." All that Art has really accomplished by eating and exercising as he does is to let his 2-3 million year evolved genes express themselves as they were meant to do — even into one's 70s, 80s, and most likely well beyond.