Evening has arrived, and Steve makes the most of it. These pants feature a comfortable resting place for one's thumbs, allowing maximum posing potential. The jacket is double-vented to prevent Steve's bionics from overheating on a hot date.
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.