sleepygeek - Try body-weight exercises. They are great for toning and building muscle (though women tone more than build, rather than men who build rather than tone).
I'm sure you can pull it off well.
Goku - Dragon Ball Z (Otakon 2015, revamp and/or DB Super)
Zoro - One Piece (Eventually)
Ippo - Hajime no Ippo (Eventually)
Free - Soul Eater (Otakon 2013, Completed)
Goku - Dragon Ball Z (Otakon 2014, Completed)
My Facebook cosplay group - Southern Maryland Cosplay
(Anyone can join)
Author of the "Getting Fit for Cosplay" Katsucon panel.