I wouldn't call her chopped liver, but athletic tomboy-looking-girls don't turn all guys on, verry much. Her arms would scare many guys off and just look at her shoulders. On the other hand, I have always been attracted to girls with some muscles in the upper body. Lots of horsegirls I grew up around had arms like hers, along with massive pectorals hiddden under soft boobs, and if extended horse training was part of her game, her legs would be very muscled-up as welll, especially the grabbing-things-between-them, innner muscles. Tennis also does amazing thiings to a girl's arms.
I'd shag her, but then, I'm the 'Dawg.
(I'm not much of a dawg, anymore, since I'm marriied, but I thought it fit the mood.)