Want to make new friends while burning some calories, ladies? I've got two words for you: roller derby.

And here I was thinking (or had been told) that joining a book club or taking a pilates class was the best way to make new friends. Ha! Book clubs and pilates are for wusses.

Per CNN, moms, wives, even teachers -- i.e., real women -- are finding the best way to find "fun, friendship, and fitness" is by, you guessed it, participating in roller derby. And you get a really cool new nickname, like "Cykosis" or "Fanny Harmher," to boot. Awesome. ("J-TWO-HO" anyone?)
Who knew burning 400 calories (or more!) an hour could be so much fun?! And you know if Dr. Sanjay Gupta recommends it, it's gotta be good for you, ladies.

And just look what roller-skating did for Jessica Simpson and gal pals Christina Applegate and Eva Longoria! (Sorry, but I can't find a version of the roller-skating lovelies with an embed code. So you'll just have to watch them burn calories on YouTube.)

Sign me up! (Not.)

[Btw, for those of you interested in joining a women's roller derby league, here's a list. You're welcome.]