Hi, welcome to our site. I am Dr Saumya Mittal. Read your query. That is a very significant question and i appreciate your problem. I will try my best to answer your query You should walk. I am not sure about the status of your arthritis. but i would go with your orthopedician. if he says no jogging, no running then you should simply walk. swimming ofcourse remains a great exercise. and why dont you try the aerobic exercises? they are a great way of exercises by the way, if you start exercising, you might as well check your sugars regularly. the dose of the metformin may need to be reduced I hope this helps you. Inform the reports mentioned above so i can be of help further. Best of luck. I have given you the answer to the maximum considering the information provided. The results of the tests could further enhance my answer to you. Please do understand that some details could be extracted from a detailed history and examination. Looking forward to your return query with the details asked so that I can help you further. (If the answer has helped you, please indicate this)