What causes backaches in pregnancy?

Physical changes: Physical changes that occur to your body because of the growing baby and the effect of hormones on your joints may lead to backaches. Imagine carrying a back pack with 25 pounds of stuff in it, only flip it around so that you carry it in front. Now carry that for 10 months. That weight puts a lot of stress on your back. Hormone changes in pregnancy loosen your joints, making the pain worse.

Sore muslces: Imagine you're going backpacking 9 months? The increasing body weight your will carry is extra work for muscles. Complicating this is most of the load is carried in front, far away from your spine. Stretching and yoga are excellent and can't be done too much. Strengthening your core is critical. Heat and massage are great to target trouble spots.