Back injury 6 weeks out!

When did you start doing some core strengthening? I've been walking regularely.    I was told not till 3 month mark, but now, 4 days before I go back to work, I've had a lower back injury and now am on dr orders to  not lift anything over 10lbs. 

Which exercises should I start with to strengthen my core, but not mess with my abdomen?

Thanks!

Sorry to hear,

I'm 13 weeks out from fracturing a vertebra. It's the second time I fracture it in less than 18 months. I would keep to the walking until you are cleared. Backs are not to be messed with.

Good luck!

I was cleared for all exercise at 6 weeks post-op.