My family has a history of back pain....genetically speaking. My dad and sister are disabled due to spinal issues....so it is always in the back of my mind(no pun intended). I strive to keep my back 'healthy' with the exercises I choose and activities I pursue.
Lately I have been reading about strengthening the core region and found this article and video very educational. I don't believe I will be doing anymore crunches with my clients!