Beware of Runners

The ship's gymnasium, like the swimming pool next door, was a hive of activity at almost any given time.  Starfleet had a bunch of fitness freaks.  It went with the territory; the whole self-improvement thing.  Since they were still sitting in dock, a lot of the crew were taking advantage of the downtime: Humans, humanoids, bench-pressing, mounting various exercise equipment.  In one of the boxing rings, two women, one green, one blue, sparred with loud impacts, dancing around each other, but without an audience.

Stepping into the gymnasium (not as empty as she thought), Kelly Nacin nearly got broadsided: A flash of gray and Caucasian skin flew past, in front of her.  The runner slowed, spinning on a heel to a stop, breathing hard: Human, bald head, gray sweatsuit, soaked with sweat.  He came back towards her and stopped.