My aunt who probably has not had to workout a day in her life bought one. I remember my grandmother having one of these contraptions when I was a kid. It was right next to the things that you stood on with a belt wrapped around you and it made everything jiggle. An older version of a power plate I suppose
I personally love doing bicycles!
Indianapolis Mini Marathon 2004 and 2005
Valparaiso Mini Marathon 2006
Chicago Marathon 2004 and 2006
yea i have one in my downstairs bedroom and actually use it as a seat when i watch tv there. but as for working out it really is not that effective. old fashioned crunches work alot better and i only bought it because it looked like it worked and my back and neck hurt from floor crunches. so if you want to get nice abs from it,dont bother, but it is comfy as a seat
I have one of the first versions with the strap at top, it seems to strain the neck alot. And its like your gonna pull the strap off. It seems ok for obliques but I just throw my clothes/coats on it these days.