Story:
https://nficstoryboard.com/content/the-unintentional-nudist-ix-tami-the-strong/
my favourite snippet of the story:
As her bare feet alternately pushed down to work the blades of each treadmill, the slim, naked, sweating teenaged girl looked down in desolation and watched as a bead of sweat fell from her forehead straight down all the way to the floor. There it joined the constellation of previous drops. The girl felt another drop run down her out-splayed left leg, finally reaching the treadmill blade at her instep. This drop, too, was one of many, following a well-worn rivulet that began at her armpit, angled around her firm breast, across the hollow of her concave tummy, stopping midway for a moment at her navel, which was a little lake of sweat, then down to hunt through the forest of her pubic hair, into her vagina lips, across her butthole, and then down the inside of her thigh. . .
The whole room smelled of the girl’s sweat as she continued to work the twin treadmills. They were separated by about three feet, forcing her pumping legs to spread open, while her arms thrust up in an “X” on the two widely separated overhead bars. She was on her third session of the afternoon, having taken two short breaks for water, and had been pumping continuously now for twenty minutes. A rigorous aerobic workout, but within her capabilities as a trained athlete. Not that this activity wasn’t serving to make her beautiful, strong, slim body even more toned, strong, and perfectly in shape.