The majority of people suffering from back pain have weak core muscles and poor body alignment. This can be mainly attributed to lack of exercise and sitting down too much. The majority of people in this day and age have desk bound jobs. A typical day for most people goes something like this:

Sit down on the way to work (car, bus, train)
Sit down all day at work
Sit down on the way home from work
Sit down and watch TV after work

 Sitting on chairs with back supports for long periods of time makes your own back support (core muscles) switch off and weaken. In addition, most sitting scenarios promote poor posture by tightening and shorting some muscles, and simultaneously weakening and lengthening others.

Poor posture and weak core muscles result in a greater activation of certain back muscles in an attempt to stabilise the spine. This is a compensatory mechanism which overloads the muscles in the back ultimately causing pain.So to cure back pain make sure that you do some regualr exercises to strengthen your back muscles