"People who say they are addicted to chocolate or pizza may not be exaggerating, U.S.-based scientists said Tuesday.
A brain scan study of normal, hungry people showed their brains lit up when they saw and smelled their favorite foods in much the same way as the brains of cocaine addicts when they think about their next snort."
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.