Have Been On Prednisone Therapy For 4 Weeks Now (60

Have been on prednisone therapy for 4 weeks now (60 mg currently) for GCA and PMR but in the last week my legs from the knees down to my feet have been feeling weak like I just ran a marathon! I have been checked for neuropathy in my legs and told I do not have that so I am not sure if the prednisone is causing it or something else? Idea?