Flexx is NOT an old man's bar.
I run a set of Enduro hi with 12 degree bend. I am 5'11" and the standing bar position is perfect.
Don't want to ride with any other bar. My wrists, elbows, and shoulders love me for it. SO does my wife. No complaining about pain when I return home. Not that it does any good to complain about pain caused by so much fun!