Firm mattresses may not be best for the back: study - Daily Times Pakistan

At last somebody has done a study of the effect of firm or medium firm mattresses on chronic lower back pain.

As might be expected from a knowledge of anatomy the medium firm users showed a higher improvement in back pain that the firm mattress users. Having said this a very soft or old sagging mattress is going to be far worse for you.

It's a shame that a memory foam mattress wasn't included in the study as these mattresses offer a more consistent support to the body.