Jointed bicycle-simulation device for isometric exercise

A bicycle-simulation device to provide exercise for a user in a seated position comprising,

• a frame,
• a first pair of pivotally connected, upwardly extending longitudinal bars, each bar having a midportion slidably coupled to said frame and having a lower end joined to the other bar of said first pair of bars at a first pivot axis, said first pair of bars defining an acute angle at said first pivot axis,
• a second pair of upwardly extending longitudinal bars adjacent said first pair, each having a midportion slidably coupled to said frame and having a lower end joined to the other bar of said second pair of bars at a second pivot axis to define an acute angle, said second pivot axis being parallel said first pivot axis, one of said bars of each pair of bars having an upper end terminating in a foot pedal and the other bar of each pair of bars terminating in a handle,
• a pulley mounted to said frame, and
• an elastomeric band tensioned about said pulley, said elastomeric band having a first end fixed to said first pair of bars at said first pivot axis and having a second end fixed to said second pair of bars at said second pivot axis, thereby causing a swinging movement of each of said bars and a pivoting at each of said first and second pivot axes upon application of force onto any one of said bars.

A bicycle-simulation device comprising,

• a housing having a base for placement on a floor,
• first and second adjacent linear bars, each having a lower end slidably received within said housing and having an upper end terminating in a foot pedal,
• third and fourth linear bars, each having a lower portion received within said housing, the lower ends of said first and third bars being pivotally attached at a first axis, the lower ends of said second and fourth bars being pivotally attached at a second axis, said third and fourth bars each having an upper end terminating in a hand-gripping means,
• a pulley mounted to said frame, said pulley having a pulley axis extending generally vertical in direction, and
• a belt frictionally trained about said pulley, said belt having opposed ends fixed to said first and second axes, thereby causing opposed back-and-forth swinging motion of said first and second bars and of said third and fourth bars upon movement of any one of said bars.