Shortly after my dad retired at ~ 56 he told me:

"I'm going to have to get a part-time job so that I can have some free time."

:-)

My step-mom said in a recent visit that she lost about 10 pounds after she retired because now she is always on her feet, moving around, working in the yard, etc., rather than sitting for hours at a desk.

Enjoy!

Cheers,
Scott.