A-Rod's Wifey Works Off the Dead Weight

7/7/2008 9:55 AM PDT

A-Rod's Wifey Works Off the Dead Weight

Cynthia Rodriguez is trying to drop 225 lbs -- and she's working out, too!

A-Rod's soon-to-be ex took a cue from Madonna and hit up the gym on Sunday -- the same day she let the world know she's dropping Alex to the curb.

Cynthia officially filed for divorce this morning.