Swimming, for example, may be an excellent way to keep fit and relieve the stress on your back from the extra pregnancy weight. Water exercises also invariably work out the trunk muscles, as you use them to balance yourself while floating weightlessly.
You can also try kneeling down on one knee with the other foot flat on the floor. Get as close to the renegade object as you can.
When sitting, try not to cross your legs. This can aggravate your back pain and compromise the circulation in your extremities.
Lying on your back puts 55 lbs. of pressure on your back. Placing a pillow under your knees cuts the pressure in half. Lying on your side with a pillow between your knees also reduces the pressure.
Ask your partner or a friend to massage your back — remember though that some aromatherapy oils can be dangerous for the baby. Instead, use baby oil to rub your aches away. Also, make sure you get enough rest, especially later on in your pregnancy. Lastly, try not to stand for long periods of time. If you have to, keep one foot up on a stool with your knee bent to prevent strain on your lower back.