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zjrog - one might argue that the position of the recumbent is *too* comfortable the way you're supported I suppose. I am mixing about equal amounts of walking and riding on that indoor recumbent trainer. On colder days, I ride inside on the recumbent bike and on warmer days I walk outside either on the sidewalks or (before the snow and ice made them treacherous) on carriage roads and foot trails down at the park. I get more of a cardio and quad workout on the recumbent, but more help on dynamic balance from walking, plus the walking is supposed to be good for your spine. I wouldn't want to ride a recumbent on the street - we have a lot of cars on our town streets and I feel safer, more visible to drivers up higher and I think I can see better too.