Beds were placed at a 20 degree angle, making them near-impossible to sleep on, and the floors of the 6ft by 3ft cells was scattered with bricks and other geometric blocks to prevent prisoners from walking backwards and forwards...the walls, which were curved and covered with mind-altering patterns of cubes, squares, straight lines and spirals which utilised tricks of colour, perspective and scale to cause mental confusion and distress. Lighting effects gave the impression that the dizzying patterns on the wall were moving.
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.