Invasive Chiropractic can be dangerous.

McTimoney Chiropractic usually not.

Osteopathy usually not.

Chiropractitioners and osteopaths usually know more about spines than physiotherapists who in turn usually know more about them than doctors! But as Guru says (I couldn't resist that) going every week for another 25 quid soon adds up.

This sounds like muscle spasm, so a visit to a McTimonay Chiro may be a good investment. It wil feel as if they do nothing, but the next day you will feel as if you were kicked by a horse. After that it may improve.

I had a fair bit of back pain quite a number of years ago, and a cynic told me to lose weight and get fit - and although you would not think it to look at me now, I did, and unless I get stoopid (which I do sometimes) the problem has never really been back.

Tell the gym of the back problems when you start. If they are any good they will assist you to find safe exercises for the lumbar region. If they suggest a lot of sit-ups, go elsewhere.