Wow. I heard about this last night around 9PM on my way home from my own gym (Shadyside X). My parents frequent the LA Fitness in Pleasant Hills.
This was clearly a highly disturbed and dangerous individual that has now caused horrible tragedy in the lives of many. For so many of us that work out and spend a good amount of our free time in a gym, it is truly unthinkable that something like this could happen in a place where you feel so comfortable.
See the story of the shooting at L.A. Fitness in Collier here: