New Workout: Science Fiction

She got to know the detainees by having them try to kill her. It all started when she needed a new, challenging exercise routine. Once you're super-strong, super-fast, and augmented six ways to hell, you take some serious challenges in order to keep growing and getting better. She knew most people stuck to the minimum regimented workout/supplement schedule, but she didn't just want to be good enough--she wanted to be better than everybody else. Partly so that she could do better, and partly so that if things ever went really, really South, she'd be able to get out. Or at least she'd stand a better chance of doing so. She'd tried the standard extreme sports and the recommended workouts--had even gotten a greyhound dog and started running with it every morning--

Inspiration: LJ writing prompt about working out, various people's posts about finding a challenging workout.
Story Potential: Medium.
Notes: It's an interesting way to get to know somebody, and this does seem to be unfolding to a larger story. On the other hand, it's not a very original larger story.