| 摘要 |
An exercise bicycle is composed of a base frame and an adjunct device. The base frame is formed of a first support tube, a second support tube, and a seat. The first support tube is provided with a shaft tube on which a crank is mounted. The crank is provided with two support shafts separated from each other for fastening pedals. The second support tube is located between two ends of the base frame and is provided at the top end thereof with a handlebar. The adjunct device consists of two long tread rods of a metal material and provided with two foot pads. The long tread rods are fastened pivotally and respectively at one end thereof with the crank such that another ends of said long tread rods are supported by two support elements at a level for doing a reciprocating motion. An exerciser is seated on the seat such that both feet of the exerciser pedal, or that the exerciser stands on the foot pads for doing a revolving treading motion.
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