Nordic Walking

I weigh in at about 312 lbs, a loss of 32 lbs. I have severe arthritis in my knees and have a bad ankle courtesy of a car wreck in 2007. I've been searching for some way to walk that isn't so painful and was told that Nordic Walking is a possibility. Does anyone participate or know anything about this sport?

What abou****er walking/ treading? They have those pools that push the water at you and you can walk/ swim forward without actually going anywhere. Just an idea...