Original costume:
Look familiar?
When they updated her costume in the 50’s it was again much like gym outfits of the time (admittedly yes, the bustier is impractical, but all they would have had to do is throw some straps on it.
Similar to:
Jane Russell in the gym scene in Gentleman Prefer Blondes:
You’ll also note it resembles swimming costume of the era if you look into it (right down to the bustier)
So in short, it wouldn’t be unreasonable to stick her in spangled yoga pants and a sports bra.
This is still important to me.
Like her clothing matched athletic outfits of the time and so like updating it should be like updating it to look like cute athletic gear of now
Thoughts From The Peacock Angel 