As it happens, you don't need to own photoshop (or even a computer) to do the same thing to your own photos. HP now offers a "slimming" option on their cameras. I thought this was a joke based on current events, but it is really on HP's site.
Any ideas on other things HP can add to their cameras to enhance photos?
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.