When it comes to finding the best ab exercises to start with, you need to view everything through a critical filter.
Important Filter: If it causes pain above a 4/10 on a pain scale, modify it or take it away.
Now that you have this rule of thumb in place let’s look at a few options.
When building a stronger core with low back pain, start with core exercises that encourage a neutral spine.
We do this to focus on building the necessary stability and endurance around an ideal position for your spine.
Not that flexion or extension or twisting is terrible, but your bad back needs a break from those pain-provoking movements, so that’s exactly what you need to give it.
Here are some of my best resources for Core Training:
Beginners Guide To Core Training With Back Pain
Top 4 Core Exercises Safe For Disc Bulges
Top 4 Barbell Core Exercises
Top 4 Core Exercises For Herniated Discs