What does it feel like to be buff?

As someone who is working towards optimal physical conditioning, I have to wonder what it feels like to walk around with a fully conditioned body.

I must admit that even after basic training, I don’t think my body was even close to 100% fit.

I don’t mean pretty fit, I mean triathlete, lance armstrong, kinda fit. Anyone who fits or who ever has fit these requirements, I’d love to hear from you.