My doctor told me that using a low-impact machine or low impact exercises would be good on my body my RSD is in my right upper extremities that going it's going into my Reds and down my spine now I got to figure out if it's spreading to my left side because I'm starting to get the same pains and burning feeling on my left side so I'm scared it's spreading I know it's really hard to move and try to do physical therapy and everything due to the pain I haven't been able to do it yet but I spoke to him about the machine called the gazelle it's a low-impact machine and he said that would be good if you want you can always talk to your doctor about it I don't know where your CRPS is but they say to that when you exercise it releases the endorphins is which is always a good thing good luck with everything