Abstract: A folding collapsible exercising apparatus includes a front base frame having a first U-shaped support and a second U-shaped support, a rear base frame slidably inserted into one end of the front base frame and locked at the desired length by a lock pin, a footboard unit pivoted to lugs at the rear base frame by locked at the desired angle by a lock pin, a seat pivoted to the second U-shaped support and locked in position by a lock pin, a supporting bar pivoted to the second U-shaped support and locked in position by a lock pin, a back support pivoted to the first U-shaped support, two elastic members bilaterally coupled between the supporting bar and the back support, a back mattress pivoted to the back support and locked in position by a lock pin, a headrest slidably coupled to the back mattress and locked in position by a lock pin, and two elastic pull cord members bilaterally coupled to the front base frame for pulling with the hands.

Abstract: A magnetic-resistance control device for an exercise bicycle includes a platform connected with a base. A flywheel axle is rotatably mounted above the platform and is engaged with a rear wheel of the bicycle to rotate in an opposite direction thereof. A flywheel is made of magnetism-conducting material and is mounted to the flywheel axle for rotating therewith. A bracket is mounted on the platform. A U-shaped permanent magnet is slidably engaged on the bracket and defines an opening in which the flywheel is partly enclosed. The flywheel interacts with magnetic flux generated by the magnet when rotated such that a magnetic force is exerted on the flywheel, thereby generating a resistance to the flywheel. A driving device is provided for driving the magnet to reciprocate relative to the flywheel.