Indoor gymnastic apparatus with means for back massaging

An indoor gymnastic apparatus comprising:

• a base frame, said base frame comprising a seat at the top, two handlebars bilaterally connected to said seat, a pivot support near a rear end thereof at the top, a first cross bar below said seat transversely bilaterally extended outwards, and a lock screw near a front end thereof at the top;
• a front extension rod longitudinally connected to said base frame at one end, said front extension rod having a line of holes aligned near a rear end thereof for inserting said lock screw alternatively;
• an oscillating rod pivotably connected to said pivot support at the top, said oscillating rod having a second cross bar transversely bilaterally extended outwards, a center hole through the longitudinal axis thereof, and a through hole near a top end thereof;
• a rear extension rod inserted into the center hole on said oscillating rod, said rear extension rod having a line of through holes near a bottom end thereof alternatively connected to the through hole on said oscillating rod by a lock bolt;
• a rocker seat pivoted to said rear extension rod at one side, said rocker seat having a plurality of cylindrical cushions revolvably transversely connected thereto by bolts;
• elastic connections respectively connected between said first and second cross bars at two opposite sides, said elastic connections having each two opposite eyed ends respectively attached with cushion rings and connected to either cross bar at either end;
• and
• wherein lying the upper part of the user's back on said cylindrical cushions causes said rear extension rod and said oscillating rod to oscillate backwards;
• releasing the pressure from said cylindrical cushions causes said rear extension rod and said oscillating rod to be pulled back to their original position by said elastic connections.