I've been box squating for a little while now, with the box set at a height which is just a little below parallel. I have been told by a few people that box squats are very bad for your back when compared with regular back squats. On the other hand I have read many articles about box squats being key in a good powerlifting routine. I have found a few references to box squats being bad for your back because they compress the discs more and this increases the chances of back problems later on in life. Can anyone offer an thoughts or advice on this topic? Thanks.