It's a funny thing - when I'm crazed with work, spending time with my children relaxes me. Yet, at the end of a long weekend with them, the very thing I need to relax is a little work and time away from them!
I think I'm a better actress for having friends and interests outside the theatre. I wouldn't want to live my life surrounded by other actors all the time.
I was probably in the best shape of any athlete at the time, but you don't get to pass judgment on yourself.