One of my sisters had trouble with sciatic nerve pain. She tried chiropractic adjustment,and pain medication, but nothing seemed to work to alleviate the pain. It affected her ability to do her usual activities.
She tried a different doctor. He told her to do 50 sit-ups in the morning and evening. He said if she did these sit-ups every day for nine months, her sciatic pain and nerve entrapment would likely improve 90%. It did - she was thrilled! She has to continue her sit-ups, but does fewer of them, unless she has a real flare-up.