Nearly all adults will experience back pain at some stage in life. The majority will feel the pain in the lumbar region ( the curve in the lower back). Now this pain can be well........a real pain in the back but it may be caused by a simple thing like muscle imbalances. A chief cause is lifestyle, active people experience lower rates of back pain whilst people who sit or slouch all day have a higher instance of back pain. The reason being is that if you spend a lot of time sitting your hip flexors shorten and become tight and pull on your lower back. So suddenly you are suffering from back pain, you try and fix the back but the problem is at the front of the hips, you need to stretch the hip flexors to relieve the muscle imbalance and relieve the back pain.
To stretch the hip flexors get down in a lunge position with one leg in front of you and the other extended behind you. Keep your torso upright and sink down and forward into the stretch until you feel it in the target area. Hold the position for 30-60 seconds then switch legs.