When I was in the Army, they forced us to do pushups.  Maybe that's why I don't care to do them nowadays.  (They also trained us to shoot at people.... I haven't done that in a while, either..)

At 80 years of age, Supreme Court Justice Ruth Ginsburg has a personal trainer, and she is now up to 20 pushups at a time!  No wonder Forbes Magazine named her one of the 100 Most Powerful Women in 2009!

(Via Yahoo)