I'm looking for provider with a gymnast / slightly muscular build. Muscular thighs and well defined abs are an incredible turn on.

Check out sessiongirls.com or wb270.com, lots of muscular gals there that do muscle worship!

She advertises on the NY Boards and has some solid abs in her photos:
http://www.theeroticreview.com/discussion-boards/new-york-ads-88/petite--fit-blonde-bombshell----mia-lamour-visiting-nyc-8-12---14-84129
.
No personal knowledge, just know her ads.

I'm not a gymnast but I don't think I'm out of line saying I have nice strong legs and a great booty from riding my bicycle all over this wonderful city 💓💓
And my abs are pretty well defined I would say. Heehee