Stretches for lower back?

Question

i'm trying to do backbends, but it's hard because my back is pretty unflexible. what kind of stretches should i do to make it more flexible?

Answer 1

Use one of those huge round soft airballs:

http://www.amazon.com/TOGU-T499750-GR-Po...

After I have played a tennis match I use it for my lower back.

Or use a Bosu, but they are pricey :

http://www.amazon.com/Bosu-Balance-Train...