the point is not much about stretching...from whatever you have said ...i gather that you are an active individual (but maybe you spend a lot of time infront of the comp or such ..this from your 'cyber space" comment!!!) but jokes apart...stretching all the muscles once a day preferably in the morning is a good idea. as for your back problem...need more info...i suggest you visit a nearby physio...he/she should be able to help you...