Absolutely swing speed affected, assuming you are connecting consistently in the club's sweet spot. I have reduced back swing to increase accuracy and make sure compressing ball. Shoulders ache somewhat so that reduces swing plane range. I hope with further tapering, more range of motion prevails. Still looking for alternatives, but hydrochlorothiazide, cyclobenzaprine hydrochloride or meloxicam do not seem to work for me. Prednizone is nasty stuff (but required I surmise)!