Strengthen that core from the inside by being mindful of your movements with everything you do.  Start with your breathing!  Breath correctly, take air in thru your nose, your belly expands with air and pull the belly into your spine as you exhale.  With any sitting down or getting up from sitting; start with your abs in the right position.  Belly into spine on an exhale and on the work part of getting up.  Support that back and strengthen your core.  Mindful movements.