I actually have an outdoor gym.
My equipment includes a shovel, a pick, a digging bar, an axe, a chainsaw, rakes (with and without teeth), and wheelbarrows.
I actually switched to this method when I found out I would not only be in better shape using this equipment, but that there was money in doing it. Well, at least for ten and a half months out of the year, anyway.
"I can shoot threes now. I can finesse you. I can dunk on you. I can guard anything, and I'm rebounding better. When I block shots I catch the ball. I can post you up with my back to the basket and hit you with a post move. Or I can face you up and use my quickness to blow by you." - Chris Walker