Hi Jonnogunn.

Yes if the diagnosis is correct and you benefited for a brief time following intensive stabilisation training - then pick up the exercises and really work on it.

Excessive manipulation is not warranted in instability, and of course will do nothing for you in the long term. There is a school of thought that you could stretch the ligaments by overzealous and repeated manipulations. However there is no sound evidence for this and frankly Xplando, I think you are being a bit alarmist. There is no reporting of harm in the evidence literature for increasing laxity of the sacrobiliac joint following manipulation - this is just an opinion. The sacroiliac ligaments are the strongest ligaments in the body the force required to cause structural change to their length would be enormous - much more than what a manipulation could ever achieve.

However it may be wise to err on the side of caution as you already have a deficient mechanism. if you are experiencing discomfort when the joint "goes out" you can often be taught how to perform a gentle mobilisation to "realign the joint" so you don't have to use untoward force and don't have to keep going back to the therapist.

An alternative treatment that works well with the strengthening/ stabilising exercises is to wear a Sacroiliac Belt. This may or may not work with you but it would be worth a try. The belt is a very simple device that provides firm but comfortable compressive pressure across the hip bones and pelvis and may prevent the joint subluxing. If this works this may prevent or at least reduced the number of episodes you are having while you get on with the business of improving the strength of the muscles. Reducing the number of subluxations in combination with the strength training may have a beneficial effect on the length of the ligaments and help them work better but you have to keep it up for several months