Our expert says:
This is a diffucult question to answer, since you have already tried what I would have recommended (belly-breathing) and you discount the possibility that it could be caused by being undertrained, unfit or overweight! Furthermore, it is not exertion related, since you mention that you get it even when running slowly.
Unfortunately, some people are more prone to stitches than others. Have you carefully considered your diet before a run (liquid and solid), since this could bring on a stitch.
The only recommendation remaining, is to see a sports physician rather than a GP, since he/she might have a better understanding of the problem. Perhaps phone the Sports Science Institute on 021 659 5644 and either see a doctor here or ask for a referral to a sports physician in your area.
I'm sorry that I can't be of further assistance.
I also recommend that you forward this question to cyberdoc, in case he can throw some light on the matter.
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