Very nice portrait and well defined muscles because of the lighting, love the soft light on her face and the expression, only thing that bothers me is her lower arm looks a little strange to me.
A nice image but my eyes are drawn towards the bright spot of the weight instead of the subject. Perhaps burning it just a little to tone it down a bit would have brought more impact to the subject. I also find the rings on the right hand out of place. Good luck in this challenge.