I don't exercise, but my school is a vocational one and I'm in the Carpentry program. We're currently building a home, and I'd say I've gained a fair bit of arm strength from it. Walls are damn heavy, as are sheets of drywall. I've also got a serious farmer's tan. My forearms below my sleeves are tanned, but anything under my shirt is pasty white.
Did anybody watch this show? I think it really represents the feel of this rp. A bunch of people are thrown into a realistic simulation of the apocalypse and are told to survive. They construct means of electricity, showers and toilets, hell, even a solar panel that tracks the sun's movements and follows it.
I'd recommend watching it, both the first and the second season. Here's a link if anyone wants it.