Inversion tables and fitness?

does anyone know what an inversion table is? I think it has something to do with fitness...

Hi,

Inversion therapy involves hanging upside down or at an inverted angle with the intention of therapeutic benefits.

Hanging by the feet, as with gravity boots or inversion tables, causes each joint in the body to be loaded in an equal and opposite manner to standing in an identical position of joint alignment.

Proponents claim that inversion therapy is particularly beneficial for the spine in that it relieves pressure on the discs and nerve roots; this in turn allows discs to recover lost moisture and to return to their original shape, decreasing the pressure they can exert on nerves. It's also used to treat back pain.

Here's a photo.

thanks heaps!!!