When to begin the training with Bender Ball?
Whenever you have decided the time is ripe you can begin, of course, you should make sure that your Dr. is updated on your exercise plans.

How long does the training take?
This depends on you but typically a training session with the bender ball is from 20 to 45 minutes following the DVD.

How long does it take to see results?
Because everyone is different each of us will train at different levels with the Bender Ball http://www.linkedin.com/in/benderball and see results at differently.
In general after just a few solid training sessions most of us will being to see the results.