Ruby didn't run in uncontrolled environments. The hologym was the only place that she let herself gather up the speed to use her power there, it could be programmed so that she wouldn't hit a bump, or need to avoid something. So her time in the gym was never about running. Just about keeping herself active and fit.
She was intending a usual work out -weights, benches, squats. Training tended to be power based, and Ruby's powers weren't technically offensive, so she needed to stay on her toes when it came to field work. If she ever got out to it.
Having fixed part of her hair into braids, Ruby wrapped them around the base of her neck to make a ponytail, heading to the weight bench, a little way away from the guy beating the shit outta the punching back just now. The gym felt calm, even with the steady sound of the punching back taking hits, and Ruby fell into her reps, even as she kept an eye on punchbag guy -it never hurt to be aware of who was in the area after all.