Alter-G puts all the extras into this futuristic “anti-gravity” treadmill — FDA approved for rehabilitation purposes. Video after the break. Click here for one more picture. Here’s how it works:

The physical lifting force generated by the G-Trainer comes from a difference in air pressure around the user’s body. Normal environmental air pressure is approximately 15psi. The maximum amount of air pressure used in the G-Trainer, if the user chooses to reduce effective body weight at the maximum 80%, is 16.5psi, so the difference is very slight. At the maximum air pressure, the user experience feels similar to the pressure against your feet if you were standing in waist-high water, but without the resistance or movement of water

[via OhGizmo!]