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.
Undercover Steve Rogers - Captain America. (Awesome Con 2017, Summer Southern MD Cosplay Meet-Up)
Organization 13 Roxas (DAS Dover Halloween Party and Mini-Con 2017, Cosplay Judge)
Xe Yui/Lord Grim - The King's Avatar (Katsucon 2018)
All Might - My Hero Academia (Katsucon 2018)
Goku (Ultra Instinct) - Dragon Ball Super (Katsucon 2018)
Possibly? Male!Megumin - KonoSuba (Katsucon 2018)
Southern Maryland Cosplayers Group
(Anyone can join)