The Wii Fit board was the first object to be linked to character run speed in WoW. Now, the folks at Mana Energy Potions have raised the ante -- they connected a pair of treadmills to their computers, and set about gauging just how possible it is to run like your character.
They took a couple steps to simulate the run speed. They measured the land-speed of your average WoW character. Then, they set up a pair of treadmills to tap forward on their accounts -- everytime they moved a certain treadmill distance, their keyboard would pulse "W" to move forward. They dressed up in some silly costumes to make sure their event was as realistic as possible, or maybe just to make the pictures funnier. And then... they ran from Shadowglen to Darnassus.
The results? The experience darn near killed 'em, apparantly. They tried a few other things -- drawing a sword while running, eating, and drinking. None of it went particularly well. And while they finished the run, the pair aren't looking forward to doing it again. The author describes it as "sheer brutality."
Final result: your character in WoW is in much better shape than you are. I am shocked and amazed. Still, if I had the carpentry skills to build their rig, I think I might take my Warrior out for a jog to help get in shape.