Here are some simple steps to learning how to engage your Transverse Abdominus Muscle (TVA).
The first thing is to be able to picture it in your mind and connect to it...
What is MAT?
Does one leg get more sore than the other? Does one side of your back chronically ache? Is one side of your neck always stiff? Or do you notice your shoes wearing differently on the bottoms when comparing right to left? Do you care about these differences? Are you curious to correct them and do you have time and energy to watch the magic happen?