Is hammock really safe? Yes, it is. People have been sleeping in the hammock for hundreds of years. When it is done properly, hammock is really comfortable and secure stuff. A lot of people have discovered that sleeping in a hammock is good for a bad back. Whether it is a broken back or any kind of back problem, it will be better through sleeping in the hammock. In the past time, sleeping in hammock is a common thing and people were completely fine without any back problem. Try to sleep diagonally. It is the way to get a top comfort and an ergonomically flat to lie down.