In reply to SenzuBean:
I think it's quite clear that the OP is talking about a prescription for oral steroids rather than steroid injections. Please don't confuse the two as they will have completely different indications, side effects and risk-benefit profiles. I think the OP should take David Hillebrandt's advice above.
Out of interest have you read the paper that you mention? I've had a quick skim through it, and whilst I can't put it into the context of Dave MacLeod's book (having not bought it) I'm not sure the data supports such a bleak outlook. They find varying effects for steroid injections (notably *not* looking at any injections into joints), and only really find negative effects in elbow tendonopathy rather than in rotator cuff problems.
> "an even more worrying finding has been repeated reports of subsequent ruptures in tendons that have been treated with multiple steroid injections"
I assume this is from somewhere different, as Coombs et al. report a single case of achilles tendon rupture which was reported from a participant who had been withdrawn from the trial, that had otherwise favourable results of steroid injections into achilles and knee injuries.
I'm not saying there is necessarily good evidence for steroid injections, or that anything in Dave's book is wrong, but I'm not sure the study you've quoted is a particularly good one to justify your further comments.