I don't think anything is unrealistic if you believe you can do it. I think if you are determined enough and willing to pay the price, you can get it done.
I think it's important to stretch as you get older, but I try to do basically all the things I did when I played, except I can't do them as well and as much.
I think your alcohol intake has to change. You know, usually a big person feels they can drink anything they want to and as much as they want to and I've cut that way back.
So, when it comes to eating healthy, it's just doing the right thing. And it's not something you have to do 365 days a year, but I think it's something you have to do 25 days a month. Let's put it that way.