Weight training

As you finish your last rep with the heavy weights, you let out a loud grunt, and the iron clatters to the floor. The sound echoes through the gym, and you notice a few more people turning their heads to look at you. You take a deep breath, feeling a sense of accomplishment and relief wash over you. You're sweaty, and your muscles ache, but it's a good kind of pain. You begin to rack the weights, your movements deliberate and controlled.

As you're putting the weights away, you catch the eye of a woman who's been watching you from across the room.

Who is she?