wow i haven't posted in this forum in like 3 years anywho, i can't search and didnt see anything in the archives so if this has been answered feel free to link me. my roommate has a bad back. not sure exactly what, maybe a herniation of a disc or two. anyway, he keeps asking me to come up with a routine for him to help him build core strength. problem is, every exercise i suggest or can think of hurts his back to do i cant really think of many things that won't hurt his back. anyone have any experience working out with a bad back? or have suggestions on how to strengthen those core muscles without aggravating it too much? i suggested everything from various ab exercises to lightweight romanian deadlifts, focussing on form. since i dont have a bad back its hard for me to judge what he can and cannot do. halp!