Can you walk 10,000 steps a day?

My doctor has given me the lovely task of walking 10,000 steps a day, but I can only seem to reach 5,000 steps. I would have to walk home from work (22 miles) to get the other 5,000 in. I know in 8 weeks when I go back for my appointment with my walking chart sadly short each day he will sit there looking at me over the top of his glasses with disbelief that I couldn't manage it, I think walking to nowhere in particular is the most boring task. Sadly lacking here in Bingaland.