Old people who have trouble getting up from sitting on the toilet use it to pull them selves up. The secondary set of handlebars are in fact toilet paper hangers.
Looks like an ab rocker to me. You lie in it, rest your head on the foam roll on that lower bar, hold the handles, and "rock" back and forth to work the abs. Sort of an assisted crunch.... its kind of an infomercial thing I believe?