Pre PMR I ran 5k every other day + fitness training workouts etc. I’ve tapered from 20mg to 6 in the last 3 months and so far so good but I miss the exercise! I tried running gently for about 2k and suffered very sore hips for 3 days as a result.
However I have found that I can still swim my normal 50 lengths at a reasonable pace without the bad reactions. For me it’s the best form of exercise - low impact, supportive and uplifting