hi ok its not such a big problem if you think about it just think sitting down and how much you can do from there if you need help see a trainer at a gym for ideas. now the next idea is to just go swimming that's if you have a pool you can get to swimming is all low impact exercising and is as good as walking for your heart and body. do hope this helps you. good luck
how do i exercise with osteoarthritis and patellar tendonitis in both knees and falling arches in both feet?