[header] How to strengthen your core [title] Engage your transversus abdominis during every workout. [step] In order to get the most out of your core-strengthening regimen, take a moment to find the transversus abdominis (your deepest core muscle). Once you've found it, you'll want to keep that muscle contracted and tight throughout the course of your workout. 
[substeps] Force yourself to take a deep cough. You should feel a muscle in your abs contract, which is the transversus abdominis.